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Journal articles on the topic 'Spin polarized electron energy spectrometer'

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Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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1

Ibach, H., D. Bruchmann, R. Vollmer, M. Etzkorn, P. S. Anil Kumar, and J. Kirschner. "A novel spectrometer for spin-polarized electron energy-loss spectroscopy." Review of Scientific Instruments 74, no. 9 (September 2003): 4089–95. http://dx.doi.org/10.1063/1.1597954.

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2

MEZIANI, ZEIN-EDDINE. "NUCLEON SPIN PHYSICS USING CEBAF AT 11 GeV." International Journal of Modern Physics A 18, no. 08 (March 30, 2003): 1281–88. http://dx.doi.org/10.1142/s0217751x03014617.

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We disscuss key experiments that address some of the nucleon spin physics questions as part of the 12 GeV planning for the energy upgrade of the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab. These experiments take advantage of a highly polarized beam and the availability of polarized target namely 3 He combined with a Medium Acceptance Spectrometer (MAD) in Hall A.

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3

SHIBATA, TOSHI-AKI. "SPIN STRUCTURE OF THE NUCLEON STUDIED BY HERMES." International Journal of Modern Physics A 18, no. 08 (March 30, 2003): 1161–68. http://dx.doi.org/10.1142/s0217751x03014472.

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The spin structure of the proton and neutron is studied by polarized deep inelastic scattering at HERMES. The longitudinally polarized electron beam at 27.6 GeV, polarized internal gas targets of 3 He , H and D, and a wide acceptance magnetic spectrometer with a particle identification capability are the important ingredients of the experiment. The basic concepts of the measurements at HERMES as well as recent physics results are presented.

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4

AUGUSTYNIAK, WITOLD. "SINGLE-SPIN AZIMUTHAL ASYMMETRY IN EXCLUSIVE ELECTROPRODUCTION OF ɸ AND ω VECTOR MESONS ON TRANSVERSELY POLARIZED PROTONS." International Journal of Modern Physics A 26, no. 03n04 (February 10, 2011): 763–65. http://dx.doi.org/10.1142/s0217751x11052773.

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The hard exclusive electro-production of ɸ and ω vector mesons was studied with the HERMES spectrometer at the DESY laboratory by scattering 27.6 GeV positron and electron beams off a transversely polarized hydrogen target. The single-spin azimuthal asymmetry with respect to the transverse proton polarization was measured.

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5

GAO, HAIYAN. "NEW RESULTS FROM THE BATES LARGE ACCEPTANCE SPECTROMETER TOROID (BLAST)." International Journal of Modern Physics E 18, no. 02 (February 2009): 209–19. http://dx.doi.org/10.1142/s0218301309012227.

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An experiment using the novel technique of scattering a longitudinally polarized electron beam from polarized internal hydrogen/deuterium gas targets was carried out in the South Hall Ring at the MIT-Bates Accelerator Center. The scattered particles were detected by the Bates Large Acceptance Spectrometer Toroid (BLAST) detector. The proton electric to magnetic form factor ratio, [Formula: see text] at Q 2 = 0.1 - 0.65 ( GeV/c )2 has been determined from the experiment by measuring the spin-dependent ep elastic scattering asymmetry in the two symmetric sectors of the BLAST simultaneously for the first time. The neutron electric form factor [Formula: see text] in the same Q2 range has been extracted by measuring the spin-dependent asymmetry from the [Formula: see text] process with a vector polarized deuterium target. These results on the nucleon form factors from the BLAST experiment are presented.

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6

GRIFFIOEN, KEITH. "DOUBLE SPIN ASYMMETRIES AND NUCLEON STRUCTURE AT CLAS." International Journal of Modern Physics A 18, no. 08 (March 30, 2003): 1177–84. http://dx.doi.org/10.1142/s0217751x03014496.

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Inclusive and exclusive double spin asymmetries have been measured in Hall B at Jefferson Lab using the CLAS spectrometer. The data cover the resonance region for 0.15 < Q2 < 1.5 GeV 2. They were taken using longitudinally polarized electron beams of 2.6 and 4.3 GeV and longitudinally polarized 15 NH 3 and 15 ND 3 targets. The data provide information on the helicity amplitudes of specific resonances as well as on the Q2-evolution of the generalized Gerasimov-Drell-Hearn Sum Rule.

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7

Vasilyev, D., and J. Kirschner. "Design and performance of a spin-polarized electron energy loss spectrometer with high momentum resolution." Review of Scientific Instruments 87, no. 8 (August 2016): 083902. http://dx.doi.org/10.1063/1.4961471.

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8

CHEN, JIAN-PING. "EXPERIMENTAL STUDY OF SINGLE SPIN ASYMMETRIES AND TMDs." International Journal of Modern Physics: Conference Series 25 (January 2014): 1460021. http://dx.doi.org/10.1142/s2010194514600210.

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Single Spin Asymmetries and Transverse Momentum Dependent (TMD) distribution study has been one of the main focuses of hadron physics in recent years. The initial exploratory Semi-Inclusive Deep-Inelastic-Scattering (SIDIS) experiments with transversely polarized proton and deuteron targets from HERMES and COMPASS attracted great attention and lead to very active efforts in both experiments and theory. A SIDIS experiment on the neutron with a polarized 3 He target was performed at JLab. Recently published results as well as new preliminary results are shown. Precision TMD experiments are planned at JLab after the 12 GeV energy upgrade. Three approved experiments with a new SoLID spectrometer on both the proton and neutron will provide high precision TMD data in the valence quark region. In the long-term future, an Electron-Ion Collider (EIC) as proposed in US (MEIC@JLab and E-RHIC@BNL) will provide precision TMD data of the gluons and the sea. A new opportunity just emerged in China that a low-energy EIC (1st stage EIC@HIAF) may provide precision TMD data in the sea quark region, complementary to the proposed EIC in US.

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9

Ahuja, Babu Lal, Ashish Rathor, Vinit Sharma, Yamini Sharma, Ashvin Ramniklal Jani, and Balkrishna Sharma. "Electronic Structure and Compton Profiles of Tungsten." Zeitschrift für Naturforschung A 63, no. 10-11 (November 1, 2008): 703–11. http://dx.doi.org/10.1515/zna-2008-10-1114.

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The energy bands, density of states and Compton profiles of tungsten have been computed using band structure methods, namely the spin-polarized relativistic Korringa-Kohn-Rostoker (SPR-KKR) approach as well as the linear combination of atomic orbitals with Hartree-Fock scheme and density functional theory. The full potential linearized augmented plane wave scheme to calculate these properties and the Fermi surface topology (except the momentum densities) have also been used to analyze the theoretical data on the electron momentum densities. The directional Compton profiles have been measured using a 100 mCi 241Am Compton spectrometer. From the comparison, the measured anisotropies are found to be in good agreement with the SPR-KKR calculations. The band structure calculations are also compared with the available data.

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10

Abd-Rahman, M. Kamil, N. F. M. Suhaimi, Evy Evana Edwin, Winnie Dian, and Nur Hanis Abdul Halim. "Optical Characteristics of Erbium-Doped SiO₂/PVA Electrospun Nanofibers." Advanced Materials Research 1108 (June 2015): 59–66. http://dx.doi.org/10.4028/www.scientific.net/amr.1108.59.

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This paper reports on the fabrication and optical characteristics of erbium-doped silica/PVA nanofibers via sol gel and electrospinning techniques. Silica glass, PVA (polyvinyl alcohol) and SiO2/PVA composites displayed 85% to 90% transparent across 300 2000 nm wavelength range. The transmission spectra were measured using Cary 5000 UV-Vis-NIR spectrophotometer. Silica was synthesized using TEOS (tetraethylorthosilicate) as the precursor, while PVA solution comprised of 7.0 wt% in H2O. The compositional ratios of SiO2:PVA were from 6:4 to 1:9 and were doped with 0.2% to 0.6% of erbium. Suitable viscosities of Er3+-doped SiO2:PVA solutions were electrospun into mesh of long strands nanofibers. Morphological and material compositions in the nanofibers were analysed using FESEM (field-emission scanning electron microscopy) and EDX (energy-dispersive X-ray spectroscopy). Er3+-doped SiO2:PVA thin films were coated on fused-silica glass substrates via spin coating and were characterized for their refractive indices, optical transmission, and fluorescence using M-line technique, UV-Vis-NIR spectrometer and photoluminescence spectrophotometer, respectively. Lower ratios of silica to PVA solutions results in higher viscosities and produced more uniform nanofiber structures of diameters around 100 nm with lesser beads. The refractive index of 1.61 for Er-doped SiO2:PVA (1:9) thin film was measured with TE polarized 632.8 nm wavelength laser and the index shows to be higher for more content of PVA in the glass/polymer composites. The 0.4% of Er3+ in SiO2:PVA composite produced the highest luminescence intensity at 605 nm when excited with 514 nm source. Higher doping content caused ion clustering effect and leads to concentration quenching, hence decreased in the emission intensity.

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11

Weigold, Erich. "Future Directions in Electron Momentum Spectroscopy of Matter." Australian Journal of Physics 51, no. 4 (1998): 751. http://dx.doi.org/10.1071/p98019.

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The development of coincidence spectrometers with multivariable detection techniques, higher energy kinematics, monochromated and spin-polarised electron sources, will usher in a new generation of electron momentum spectroscopy revealing new electronic phenomena in atoms, molecules and solids. This will be enhanced by developments in target preparation, such as spin polarised, oriented and aligned atoms and molecules, radicals, surfaces and strongly correlated systems in condensed matter.

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12

KOSHIKAWA, Takanori, Masahiko SUZUKI, Tsuneo YASUE, Ernst BAUER, Tsutomu NAKANISHI, Xiuguang JIN, and Yoshikazu TAKEDA. "Spin-polarized Low Energy Electron Microscopy." Journal of the Vacuum Society of Japan 57, no. 10 (2014): 382–90. http://dx.doi.org/10.3131/jvsj2.57.382.

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13

HOPSTER, H. "SPIN-POLARIZED ELECTRON ENERGY LOSS SPECTROSCOPY." Surface Review and Letters 01, no. 01 (June 1994): 89–96. http://dx.doi.org/10.1142/s0218625x94000114.

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Spin-polarized electron energy loss spectroscopy (SPEELS) probes the spin-dependent electron-hole pair excitation spectrum at surfaces. It is a very surface sensitive method for the detection of surface magnetization. Indirectly, information on surface magnetic moments is obtained. SPEELS is capable of resolving layer-by-layer antiferromagnetic order as found in 3d metal (Cr, Mn, V) films on Fe(100).

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14

Duden, Th, and E. Bauer. "Spin-Polarized Low Energy Electron Microscopy." Surface Review and Letters 05, no. 06 (December 1998): 1213–19. http://dx.doi.org/10.1142/s0218625x98001547.

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We present the concept and recent developments of spin-polarized low energy electron microscopy. A detailed discussion addresses the questions of magnetic resolution and the image acquisition rate. Examples of recent experiments illustrating the possibilities of the present instrumental setup are given.

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15

QIAO, S., A. KIMURA, A. MORIHARA, S. HASUI, E. KOTANI, H. TAKAYAMA, K. SHIMADA, H. NAMATAME, and M. TANIGUCHI. "ELECTRON OPTICS WITH CYLINDRICAL DEFLECTOR FOR SPIN-RESOLVED INVERSE PHOTOEMISSION SPECTROSCOPY." Surface Review and Letters 09, no. 01 (February 2002): 487–89. http://dx.doi.org/10.1142/s0218625x02002506.

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For a spin-resolved inverse photoemission spectrometer, the most important component is the electron optics system consisting of a 90° deflector and lenses to transfer the spin-polarized electrons from a GaAs photocathode to the sample at high transmission. We adopt a cylindrical deflector when we construct a spin-resolved inverse photoemission spectrometer. A performance test shows that our electronic optics system has achieved 83% transmission, and also that the cylindrical deflector has no shortcoming compared to the spherical type.

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16

Stachulec, K. "Spin polarized low energy electron diffraction (SPLEED)." Physica B+C 142, no. 3 (December 1986): 332–47. http://dx.doi.org/10.1016/0378-4363(86)90028-8.

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17

Okuda, T., Y. Takeichi, A. Harasawa, I. Matsuda, T. Kinoshita, and A. Kakizaki. "High efficiency and high energy-resolution spin-polarized photoemission spectrometer." European Physical Journal Special Topics 169, no. 1 (March 2009): 181–85. http://dx.doi.org/10.1140/epjst/e2009-00990-y.

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18

Petrov, V. N., and A. S. Kamochkin. "Energy analyzer for spin polarized Auger electron spectroscopy." Review of Scientific Instruments 75, no. 5 (May 2004): 1274–79. http://dx.doi.org/10.1063/1.1711142.

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19

Yu, Lei, Weishi Wan, Takanori Koshikawa, Meng Li, Xiaodong Yang, Changxi Zheng, Masahiko Suzuki, et al. "Aberration corrected spin polarized low energy electron microscope." Ultramicroscopy 216 (September 2020): 113017. http://dx.doi.org/10.1016/j.ultramic.2020.113017.

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20

Abraham, D. L., and H. Hopster. "Spin-polarized electron-energy-loss spectroscopy on Ni." Physical Review Letters 62, no. 10 (March 6, 1989): 1157–60. http://dx.doi.org/10.1103/physrevlett.62.1157.

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21

Bixler, D. L., J. C. Lancaster, R. A. Popple, F. B. Dunning, and G. K. Walters. "Low-energy, electron-spin-polarized 4He+ ion source." Review of Scientific Instruments 69, no. 5 (May 1998): 2012–16. http://dx.doi.org/10.1063/1.1148890.

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22

Sawler, J., and D. Venus. "Electron polarimeter based on spin‐polarized low‐energy electron diffraction." Review of Scientific Instruments 62, no. 10 (October 1991): 2409–18. http://dx.doi.org/10.1063/1.1142256.

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23

Muchnoi, N. Yu. "Electron beam polarimeter and energy spectrometer." Journal of Instrumentation 17, no. 10 (October 1, 2022): P10014. http://dx.doi.org/10.1088/1748-0221/17/10/p10014.

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Abstract The backscattering of laser radiation by a relativistic electron beam is a widely used method for measuring the spin polarization of electrons. We consider again the properties of the scattering process paying special attention to recoil electrons. Based on this consideration we propose the concept of the Compton polarimeter in which, in addition to all the polarization components, it becomes possible to accurately measure the energy and other parameters of the electron beam. To demonstrate the capabilities of the method we conduct a Monte Carlo simulations of the polarimeter developed for the FCC-ee project.

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24

Rougemaille, N., and A. K. Schmid. "Magnetic imaging with spin-polarized low-energy electron microscopy." European Physical Journal Applied Physics 50, no. 2 (April 16, 2010): 20101. http://dx.doi.org/10.1051/epjap/2010048.

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25

Bixler, D. L., J. C. Lancaster, F. J. Kontur, R. A. Popple, F. B. Dunning, and G. K. Walters. "Improved low-energy, electron-spin-polarized 4He+ ion source." Review of Scientific Instruments 70, no. 1 (January 1999): 240–41. http://dx.doi.org/10.1063/1.1149572.

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26

Duden, T., and E. Bauer. "Spin-polarized low energy electron microscopy of ferromagnetic layers." Journal of Electron Microscopy 47, no. 5 (January 1, 1998): 379–85. http://dx.doi.org/10.1093/oxfordjournals.jmicro.a023608.

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27

Hatsugai, Yasuhiro, and Takeo Fujiwara. "Spin polarized electron energy band of orthorhombic (La2CuO4)2." Solid State Communications 65, no. 11 (March 1988): 1271–74. http://dx.doi.org/10.1016/0038-1098(88)90074-9.

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28

Kaplan, S. N., C. F. Burrell, R. V. Pyle, L. Ruby, A. S. Schlachter, and J. W. Stearns. "Electron-Spin-Polarized Targets for a Collisionally-Pumped Polarized-Ion Source." IEEE Transactions on Nuclear Science 32, no. 5 (1985): 1739–41. http://dx.doi.org/10.1109/tns.1985.4333707.

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29

Iqbal, Z., M. Ayub, H. A. Shah, and G. Murtaza. "Energy behavior of spin electron cyclotron wave in a spin polarized plasma." Physics Letters A 383, no. 24 (August 2019): 2903–7. http://dx.doi.org/10.1016/j.physleta.2019.06.005.

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30

Suzuki, Masahiko, Michihiro Hashimoto, Tsuneo Yasue, Takanori Koshikawa, Yasuhide Nakagawa, Taro Konomi, Atsushi Mano, et al. "Real Time Magnetic Imaging by Spin-Polarized Low Energy Electron Microscopy with Highly Spin-Polarized and High Brightness Electron Gun." Applied Physics Express 3, no. 2 (January 29, 2010): 026601. http://dx.doi.org/10.1143/apex.3.026601.

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31

Tereshchenko, Oleg E., Vladimir A. Golyashov, Vadim S. Rusetsky, Andrey V. Mironov, Alexander Yu Demin, and Vladimir V. Aksenov. "A new imaging concept in spin polarimetry based on the spin-filter effect." Journal of Synchrotron Radiation 28, no. 3 (March 30, 2021): 864–75. http://dx.doi.org/10.1107/s1600577521002307.

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The concept of an imaging-type 3D spin detector, based on the combination of spin-exchange interactions in the ferromagnetic (FM) film and spin selectivity of the electron–photon conversion effect in a semiconductor heterostructure, is proposed and demonstrated on a model system. This novel multichannel concept is based on the idea of direct transfer of a 2D spin-polarized electron distribution to image cathodoluminescence (CL). The detector is a hybrid structure consisting of a thin magnetic layer deposited on a semiconductor structure allowing measurement of the spatial and polarization-dependent CL intensity from injected spin-polarized free electrons. The idea is to use spin-dependent electron transmission through in-plane magnetized FM film for in-plane spin detection by measuring the CL intensity from recombined electrons transmitted in the semiconductor. For the incoming electrons with out-of-plane spin polarization, the intensity of circularly polarized CL light can be detected from recombined polarized electrons with holes in the semiconductor. In order to demonstrate the ability of the solid-state spin detector in the image-type mode operation, a spin detector prototype was developed, which consists of a compact proximity focused vacuum tube with a spin-polarized electron source [p-GaAs(Cs,O)], a negative electron affinity (NEA) photocathode and the target [semiconductor heterostructure with quantum wells also with NEA]. The injection of polarized low-energy electrons into the target by varying the kinetic energy in the range 0.5–3.0 eV and up to 1.3 keV was studied in image-type mode. The figure of merit as a function of electron kinetic energy and the target temperature is determined. The spin asymmetry of the CL intensity in a ferromagnetic/semiconductor (FM-SC) junction provides a compact optical method for measuring spin polarization of free-electron beams in image-type mode. The FM-SC detector has the potential for realizing multichannel 3D vectorial reconstruction of spin polarization in momentum microscope and angle-resolved photoelectron spectroscopy systems.

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32

Okuda, Taichi, Yasuo Takeichi, Yuuki Maeda, Ayumi Harasawa, Iwao Matsuda, Toyohiko Kinoshita, and Akito Kakizaki. "A new spin-polarized photoemission spectrometer with very high efficiency and energy resolution." Review of Scientific Instruments 79, no. 12 (December 2008): 123117. http://dx.doi.org/10.1063/1.3058757.

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33

Pradeep, A. V., Arnab Roy, P. S. Anil Kumar, and J. Kirschner. "Development of a spin polarized low energy electron diffraction system." Review of Scientific Instruments 87, no. 2 (February 2016): 023906. http://dx.doi.org/10.1063/1.4941682.

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34

Ortiz, G., and P. Ballone. "The Correlation Energy of the Spin-Polarized Uniform Electron Gas." Europhysics Letters (EPL) 23, no. 1 (July 1, 1993): 7–13. http://dx.doi.org/10.1209/0295-5075/23/1/002.

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35

Tillmann, D., R. Thiel, and E. Kisker. "Very-low-energy spin-polarized electron diffraction from Fe(001)." Zeitschrift f�r Physik B Condensed Matter 77, no. 1 (February 1989): 1–2. http://dx.doi.org/10.1007/bf01313611.

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36

Bauer, E., T. Duden, and R. Zdyb. "Spin-polarized low energy electron microscopy of ferromagnetic thin films*." Journal of Physics D: Applied Physics 35, no. 19 (September 13, 2002): 2327–31. http://dx.doi.org/10.1088/0022-3727/35/19/301.

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37

Zakeri, Kh, Y. Zhang, and J. Kirschner. "Surface magnons probed by spin-polarized electron energy loss spectroscopy." Journal of Electron Spectroscopy and Related Phenomena 189 (August 2013): 157–63. http://dx.doi.org/10.1016/j.elspec.2012.06.009.

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38

Vasilyev, D., and J. Kirschner. "Spin-polarized electron energy loss spectroscopy at high momentum resolution." Surface and Interface Analysis 48, no. 11 (July 27, 2016): 1100–1103. http://dx.doi.org/10.1002/sia.6093.

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39

KHALILOV, V. R. "AHARONOV–BOHM EFFECT WITH SPIN-POLARIZED ELECTRONS." Modern Physics Letters A 21, no. 21 (July 10, 2006): 1647–56. http://dx.doi.org/10.1142/s0217732306020962.

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The scattering of spin-polarized electrons in an Aharonov–Bohm vector potential is considered. The scattering cross-sections for spin-unpolarized and spin-polarized electron beams differ. It is shown that a bound electron state may occur if the interaction of electron spin with magnetic field having the form of two-dimensional delta function is included. The occurrence of bound state can modify the scattering states but the total cross-section does not change.

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40

PAN, SHEAU-SHI, WEI-TOU NI, and SHEN-CHE CHEN. "EXPERIMENTAL SEARCH FOR ANOMALOUS SPIN-SPIN INTERACTIONS." Modern Physics Letters A 07, no. 14 (May 10, 1992): 1287–99. http://dx.doi.org/10.1142/s0217732392003773.

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A Cavendish-type torsion pendulum, having test masses with 2.5×1022 polarized electrons and "attracting" masses with 8×1023 polarized electrons, is used to search for an anomalous spin interaction of macroscopic range. Competition from magnetic forces is reduced by using ferrimagnetic Dy-Fe masses which exhibit orbital compensation of the electron spin magnetic moments. Combined with magnetic shielding, the sensitivity is 2×10-4 of the gravitational force. Fluctuations set the overall experimental limit at about 5 times this level. Our results set limits on electron spin interactions and on moments which are not of electromagnetic origin. In terms of a standard dipole-dipole form, the limit is 1.5 ×10-12 of the interaction strength between the magnetic moments of the electrons. Compared to previous results, this is a six-cold improvement.

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41

Berger, Michael, Dominik Schulz, and Jamal Berakdar. "Spin-Resolved Quantum Scars in Confined Spin-Coupled Two-Dimensional Electron Gas." Nanomaterials 11, no. 5 (May 11, 2021): 1258. http://dx.doi.org/10.3390/nano11051258.

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Quantum scars refer to an enhanced localization of the probability density of states in the spectral region with a high energy level density. Scars are discussed for a number of confined pure and impurity-doped electronic systems. Here, we studied the role of spin on quantum scarring for a generic system, namely a semiconductor-heterostructure-based two-dimensional electron gas subjected to a confining potential, an external magnetic field, and a Rashba-type spin-orbit coupling. Calculating the high energy spectrum for each spin channel and corresponding states, as well as employing statistical methods known for the spinless case, we showed that spin-dependent scarring occurs in a spin-coupled electronic system. Scars can be spin mixed or spin polarized and may be detected via transport measurements or spin-polarized scanning tunneling spectroscopy.

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42

Pandey, P., S. Kuhn, V. Lagerquist, C. Keith, J. Brock, and J. Maxwell. "Longitudinal Solid Polarized Target for CLAS12." Journal of Nepal Physical Society 8, no. 2 (December 19, 2022): 23–30. http://dx.doi.org/10.3126/jnphyssoc.v8i2.50144.

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The Run Group C suite of experiments measure multiple spin-dependent observables by scattering an 11 GeV electron beam from longitudinally polarized nucleon targets inside the CLAS12 spectrometer in Hall B at Jefferson Lab. The dynamically polarized target built for these experiments has been extensively tested by the JLab Target Group in the Experimental Equipment Lab using an auxiliary 5 T magnet. We report on the operational experience with the target, the benchmarks achieved so far (using various polarizable materials) as well as the complete target setup, experimental readiness, and its present status. Our results show that all target components work well and the project has started successfully with the first beam on June 11, 2022.

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43

ALARCON, R. "THE BLAST EXPERIMENT: POLARIZED ELECTRON SCATTERING FROM HYDROGEN AND DEUTERIUM." Modern Physics Letters A 24, no. 11n13 (April 30, 2009): 875–80. http://dx.doi.org/10.1142/s0217732309000218.

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At the MIT-Bates Linear Accelerator Center, the nucleon form factors have been measured by scattering polarized electrons from vector-polarized hydrogen and deuterium. The experiment used the longitudinally polarized electron beam stored in the MIT-Bates South Hall Ring along with an isotopically pure, highly vector-polarized internal atomic hydrogen and deuterium target provided by an atomic beam source. The measurements were carried out with the symmetric Bates Large Acceptance Spectrometer Toroid (BLAST). Results are presented for the proton form factor ratio, [Formula: see text], and for the charge form factor of the neutron, [Formula: see text]. Both results are more precise than previous data in the corresponding Q2 ranges.

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44

Valizadeh, Mohammad M., and Sashi Satpathy. "RKKY interaction for the spin-polarized electron gas." International Journal of Modern Physics B 29, no. 30 (November 18, 2015): 1550219. http://dx.doi.org/10.1142/s0217979215502197.

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We extend the original work of Ruderman, Kittel, Kasuya and Yosida (RKKY) on the interaction between two magnetic moments embedded in an electron gas to the case where the electron gas is spin-polarized. The broken symmetry of a host material introduces the Dzyaloshinsky–Moriya (DM) vector and tensor interaction terms, in addition to the standard RKKY term, so that the net interaction energy has the form [Formula: see text]. We find that for the spin-polarized electron gas, a nonzero tensor interaction [Formula: see text] is present in addition to the scalar RKKY interaction [Formula: see text], while [Formula: see text] is zero due to the presence of inversion symmetry. Explicit expressions for these are derived for the electron gas both in 2D and 3D and we show that the net magnetic interaction can be expressed as a sum of Heisenberg and Ising like terms. The RKKY interaction exhibits a beating pattern, caused by the presence of the two Fermi momenta [Formula: see text] and [Formula: see text], while the [Formula: see text] distance dependence of the original RKKY result for the 3D electron gas is retained. This model serves as a simple example of the magnetic interaction in systems with broken symmetry, which goes beyond the RKKY interaction.

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Etzkorn, M., P. S. Anil Kumar, R. Vollmer, H. Ibach, and J. Kirschner. "Spin waves in ultrathin Co-films measured by spin polarized electron energy loss spectroscopy." Surface Science 566-568 (September 2004): 241–45. http://dx.doi.org/10.1016/j.susc.2004.05.051.

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Zhou, Hsiao-Ling, Barbara L. Whitten, Wayne K. Trail, Michael A. Morrison, Keith B. MacAdam, Klaus Bartschat, and David W. Norcross. "Low-energy electron collisions with sodium: Scattering of spin-polarized electrons." Physical Review A 52, no. 2 (August 1, 1995): 1152–77. http://dx.doi.org/10.1103/physreva.52.1152.

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de la Figuera, Juan, Lucía Vergara, Alpha T. N'Diaye, Adrian Quesada, and Andreas K. Schmid. "Micromagnetism in (001) magnetite by spin-polarized low-energy electron microscopy." Ultramicroscopy 130 (July 2013): 77–81. http://dx.doi.org/10.1016/j.ultramic.2013.02.020.

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Hoffman, Gary G. "Correlation energy of a spin-polarized electron gas at high density." Physical Review B 45, no. 15 (April 15, 1992): 8730–33. http://dx.doi.org/10.1103/physrevb.45.8730.

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Qiao, S., A. Kimura, A. Harasawa, and A. Kakizaki. "A new compact spin- and angle-resolving photoelectron spectrometer with a high efficiency." Journal of Synchrotron Radiation 5, no. 3 (May 1, 1998): 741–43. http://dx.doi.org/10.1107/s0909049597019067.

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Abstract:

A portable spin- and angle-resolving photoelectron spectrometer has been constructed, equipped with a newly developed compact retarding-potential Mott-scattering electron spin polarimeter with an efficiency of 1.9 × 10−4 for a gold target. Based on Monte Carlo calculations for the spin-dependent electron-scattering process and electron ray-tracing calculations, a novel design of the retarding-field electron optics with 0.59 sr collection solid angle for scattered electrons has been accomplished. Utilizing this spectrometer, the spin- and angle-resolved photoelectron spectra have been measured and the spin-dependent electronic structure of Ni(110), Ni(110)-p(2 × 1)O and Ni(110)-c(2 × 2)S along the {\overline {\Gamma S}} line of the Ni(110) surface Brillouin zone have been studied.

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BRADAMANTE, FRANCO. "TRANSVERSE SPIN AND TRANSVERSE MOMENTUM EFFECTS AT COMPASS." Modern Physics Letters A 24, no. 35n37 (December 7, 2009): 3015–24. http://dx.doi.org/10.1142/s0217732309001224.

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Abstract:

The study of transverse spin and transverse momentum effects is part of the scientific program of COMPASS, a fixed target experiment at the CERN SPS. For these studies, a 160 GeV/c momentum muon beam is scattered on a transversely polarized nucleon target, and the scattered muon and the forward going hadrons produced in DIS processes are reconstructed and identified in a magnetic spectrometer. The measurements have been performed on a deuteron target in 2002, 2003 and 2004, and on a proton target in 2007. The main results obtained measuring single spin asymmetries are reviewed, with particular emphasis on the most recent proton measurements. After two years of spectroscopy measurements with hadron beams, in 2008 and 2009, the Collaboration will resume measurements with the muon beam and a transversely polarized target in 2010.

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