Artigos de revistas sobre o tema "Nuclear astrophysics"

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1

Depalo, Rosanna. "Nuclear Astrophysics Deep Underground". International Journal of Modern Physics: Conference Series 46 (janeiro de 2018): 1860003. http://dx.doi.org/10.1142/s2010194518600030.

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Cross sections of nuclear reactions relevant for astrophysics are crucial ingredients to understand the energy generation inside stars and the synthesis of the elements. At astrophysical energies, nuclear cross sections are often too small to be measured in laboratories on the Earth surface, where the signal would be overwhelmed by the cosmic-ray induced background. LUNA is a unique Nuclear Astrophysics experiment located at Gran Sasso National Laboratories. The extremely low background achieved at LUNA allows to measure nuclear cross sections directly at the energies of astrophysical interest. Over the years, many crucial reactions involved in stellar hydrogen burning as well as Big Bang nucleosynthesis have been measured at LUNA. The present contribution provides an overview on underground Nuclear Astrophysics as well as the latest results and future perspectives of the LUNA experiment.
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2

Adsley, Philip. "Transfer Reactions in Nuclear Astrophysics". EPJ Web of Conferences 275 (2023): 01001. http://dx.doi.org/10.1051/epjconf/202327501001.

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Transfer reactions are important tool in nuclear astrophysics. These reactions allow us to identify states in nuclei and to find the corresponding energies, to determine if these states can contribute to astrophysical nuclear reactions and ultimately to determine the strength of that contribution. In this paper,the basic details of how transfer reactions may be used in nuclear astrophysics are set out along with some common pitfalls to avoid.
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3

Gyürky, György. "Challenges and Requirements in High-Precision Nuclear Astrophysics Experiments". Universe 8, n.º 4 (28 de março de 2022): 216. http://dx.doi.org/10.3390/universe8040216.

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In the 21th century astronomical observations, as well as astrophysical models, have become impressively precise. For a better understanding of the processes in stellar interiors, the nuclear physics of astrophysical relevance—known as nuclear astrophysics—must aim for similar precision, as such precision is not reached yet in many cases. This concerns both nuclear theory and experiment. In this paper, nuclear astrophysics experiments are put in focus. Through the example of various parameters playing a role in nuclear reaction studies, the difficulties of reaching high precision and the possible solutions are discussed.
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4

Lépine-Szily, Alinka, e Pierre Descouvemont. "Nuclear astrophysics: nucleosynthesis in the Universe". International Journal of Astrobiology 11, n.º 4 (9 de maio de 2012): 243–50. http://dx.doi.org/10.1017/s1473550412000158.

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AbstractNuclear astrophysics is a relatively young science; it is about half a century old. It is a multidisciplinary subject, since it combines nuclear physics with astrophysics and observations in astronomy. It also addresses fundamental issues in astrobiology through the formation of elements, in particular those required for a carbon-based life. In this paper, a rapid overview of nucleosynthesis is given, mainly from the point of view of nuclear physics. A short historical introduction is followed by the definition of the relevant nuclear parameters, such as nuclear reaction cross sections, astrophysical S-factors, the energy range defined by the Gamow peak and reaction rates. The different astrophysical scenarios that are the sites of nucleosynthesis, and different processes, cycles and chains that are responsible for the building of complex nuclei from the elementary hydrogen nuclei are then briefly described.
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5

Arnould, M., e K. Takahashi. "Nuclear astrophysics". Reports on Progress in Physics 62, n.º 3 (1 de janeiro de 1999): 395–462. http://dx.doi.org/10.1088/0034-4885/62/3/003.

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6

Penionzhkevich, Yu E. "Nuclear astrophysics". Physics of Atomic Nuclei 73, n.º 8 (agosto de 2010): 1460–68. http://dx.doi.org/10.1134/s106377881008020x.

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7

Langanke, K. "Nuclear astrophysics". Nuclear Physics A 654, n.º 1-2 (julho de 1999): C330—C349. http://dx.doi.org/10.1016/s0375-9474(99)00262-6.

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8

Rauscher, Thomas, e Friedrich-Karl Thielemann. "Nuclear astrophysics". Europhysics News 32, n.º 6 (novembro de 2001): 224–26. http://dx.doi.org/10.1051/epn:2001608.

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9

Haxton, W. C. "Nuclear astrophysics". Nuclear Physics A 553 (março de 1993): 397–406. http://dx.doi.org/10.1016/0375-9474(93)90638-e.

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10

Descouvemont, P. "Astrophysica for Windows: a PC software for nuclear astrophysics". Nuclear Physics A 688, n.º 1-2 (maio de 2001): 557–59. http://dx.doi.org/10.1016/s0375-9474(01)00786-2.

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11

RAUSCHER, THOMAS. "THE PATH TO IMPROVED REACTION RATES FOR ASTROPHYSICS". International Journal of Modern Physics E 20, n.º 05 (maio de 2011): 1071–169. http://dx.doi.org/10.1142/s021830131101840x.

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This review focuses on nuclear reactions in astrophysics and, more specifically, on reactions with light ions (nucleons and α particles) proceeding via the strong interaction. It is intended to present the basic definitions essential for studies in nuclear astrophysics, to point out the differences between nuclear reactions taking place in stars and in a terrestrial laboratory, and to illustrate some of the challenges to be faced in theoretical and experimental studies of those reactions. The discussion revolves around the relevant quantities for astrophysics, which are the astrophysical reaction rates. The sensitivity of the reaction rates to the uncertainties in the prediction of various nuclear properties is explored and some guidelines for experimentalists are also provided.
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12

Kubono, S. "Nuclear Astrophysics with Radioactive Nuclear Beams". Progress of Theoretical Physics 96, n.º 2 (1 de agosto de 1996): 275–306. http://dx.doi.org/10.1143/ptp.96.275.

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13

APRAHAMIAN, A., K. LANGANKE e M. WIESCHER. "Nuclear structure aspects in nuclear astrophysics". Progress in Particle and Nuclear Physics 54, n.º 2 (abril de 2005): 535–613. http://dx.doi.org/10.1016/j.ppnp.2004.09.002.

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14

Arcones, Almudena, Dan W. Bardayan, Timothy C. Beers, Lee A. Bernstein, Jeffrey C. Blackmon, Bronson Messer, B. Alex Brown et al. "White paper on nuclear astrophysics and low energy nuclear physics Part 1: Nuclear astrophysics". Progress in Particle and Nuclear Physics 94 (maio de 2017): 1–67. http://dx.doi.org/10.1016/j.ppnp.2016.12.003.

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15

Käppeler, F. "Astrophysics at nuclear reactors". Acta Physica Hungarica 75, n.º 1-4 (dezembro de 1994): 41–45. http://dx.doi.org/10.1007/bf03156556.

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16

Salpeter, Edwin E. "Nuclear Astrophysics Before 1957". Publications of the Astronomical Society of Australia 25, n.º 1 (2008): 1–6. http://dx.doi.org/10.1071/as07036.

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AbstractI discuss especially my summer with Willy Fowler at Kellogg Radiation Laboratory in 1951, where I did my ‘triple alpha’ work. I also go back even earlier to Arthur Eddington and Hans Bethe. The 1953 summer school in Ann Arbor only gets a mention.
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17

Gialanella, Lucio, Antonino Di Leva e Fillipo Terrasi. "Nuclear Astrophysics at CIRCE". Nuclear Physics News 28, n.º 3 (3 de julho de 2018): 20–24. http://dx.doi.org/10.1080/10619127.2018.1463018.

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18

Huang, Meirong, Hernan J. Quevedo, Guoqiang Zhang e Aldo Bonasera. "Nuclear Astrophysics with Lasers". Nuclear Physics News 29, n.º 3 (3 de julho de 2019): 9–13. http://dx.doi.org/10.1080/10619127.2019.1603555.

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19

Broggini, Carlo. "Nuclear Astrophysics with LUNA". Journal of Physics: Conference Series 703 (abril de 2016): 012006. http://dx.doi.org/10.1088/1742-6596/703/1/012006.

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20

Malaney, Robert A. "Supercomputers And Nuclear Astrophysics". Computers in Physics 2, n.º 6 (1988): 40. http://dx.doi.org/10.1063/1.4822797.

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21

Dillmann, I., e R. Reifarth. "Nuclear astrophysics with neutrons". Journal of Instrumentation 7, n.º 04 (19 de abril de 2012): C04014. http://dx.doi.org/10.1088/1748-0221/7/04/c04014.

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22

Jonson, B. "Nuclear processes in astrophysics". Physica Scripta T59 (1 de janeiro de 1995): 53–58. http://dx.doi.org/10.1088/0031-8949/1995/t59/006.

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23

Schatz, Hendrik. "Trends in nuclear astrophysics". Journal of Physics G: Nuclear and Particle Physics 43, n.º 6 (16 de maio de 2016): 064001. http://dx.doi.org/10.1088/0954-3899/43/6/064001.

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24

Bertulani, C. A., e T. Kajino. "Frontiers in nuclear astrophysics". Progress in Particle and Nuclear Physics 89 (julho de 2016): 56–100. http://dx.doi.org/10.1016/j.ppnp.2016.04.001.

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25

Mohr, P., T. Rauscher, K. Sonnabend, K. Vogt e A. Zilges. "Photoreactions in nuclear astrophysics". Nuclear Physics A 718 (maio de 2003): 243–46. http://dx.doi.org/10.1016/s0375-9474(03)00721-8.

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26

Smith, Michael S. "Nuclear data for astrophysics". Nuclear Physics A 718 (maio de 2003): 339–46. http://dx.doi.org/10.1016/s0375-9474(03)00736-x.

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27

Schatz, H. "Nuclear masses in astrophysics". International Journal of Mass Spectrometry 349-350 (setembro de 2013): 181–86. http://dx.doi.org/10.1016/j.ijms.2013.03.016.

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28

Rehm, K. E. "Experiments in Nuclear Astrophysics". Nuclear Physics A 787, n.º 1-4 (maio de 2007): 289–98. http://dx.doi.org/10.1016/j.nuclphysa.2006.12.045.

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29

Mathews, Grant J. "Frontiers of Nuclear Astrophysics". Nuclear Physics A 805, n.º 1-4 (junho de 2008): 303c—312c. http://dx.doi.org/10.1016/j.nuclphysa.2008.02.258.

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30

Buchmann, L., P. Amaudruz, J. D'Auria, D. Hutcheon, C. Matei, J. Pearson, C. Ruiz et al. "Nuclear Astrophysics at TRIUMF". Nuclear Physics A 805, n.º 1-4 (junho de 2008): 462c—469c. http://dx.doi.org/10.1016/j.nuclphysa.2008.02.267.

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31

Kubono, S., Dam N. Binh, S. Hayakawa, H. Hashimoto, D. Kahl, Y. Wakabayashi, H. Yamaguchi et al. "Nuclear Clusters in Astrophysics". Nuclear Physics A 834, n.º 1-4 (março de 2010): 647c—650c. http://dx.doi.org/10.1016/j.nuclphysa.2010.01.113.

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32

Matteson, J. L. "The nuclear astrophysics explorer". Advances in Space Research 11, n.º 8 (janeiro de 1991): 369–78. http://dx.doi.org/10.1016/0273-1177(91)90190-u.

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33

Arnould, M., e M. Rayet. "Nuclear reactions in astrophysics". Annales de Physique 15, n.º 3 (1990): 183–254. http://dx.doi.org/10.1051/anphys:01990001503018300.

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34

Grawe, H., K. Langanke e G. Martínez-Pinedo. "Nuclear structure and astrophysics". Reports on Progress in Physics 70, n.º 9 (29 de agosto de 2007): 1525–82. http://dx.doi.org/10.1088/0034-4885/70/9/r02.

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35

Reifarth, R., S. Dababneh, S. Fiebiger, J. Glorius, K. Göbel, M. Heil, P. Hillmann et al. "Nuclear astrophysics at FRANZ". Journal of Physics: Conference Series 940 (janeiro de 2018): 012024. http://dx.doi.org/10.1088/1742-6596/940/1/012024.

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36

Shen, Yang-Ping, Bing Guo e Wei-Ping Liu. "An indirect technique in nuclear astrophysics: alpha-cluster transfer reaction". EPJ Web of Conferences 260 (2022): 01001. http://dx.doi.org/10.1051/epjconf/202226001001.

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Helium(4He, or α)is the second most abundant element in the observable Universe. The α-particle induced reactions such as(α, γ), (α, n) and (α, p) play a crucial role in nuclear astrophysics, especially for understanding stellar heliumburning. Because of the strong Coulomb repulsion, it is greatly hindered to directly measure the cross sections for these α-capture reactions at stellar energies. Alpha-cluster transfer reaction is a powerful tool for investigation of astrophysical(α, γ), (α, n)and(α, p)reactions since it can preferentially populate the natural-parity states with an α-cluster structure which dominantly contribute to these astrophysical α-capture reactions during stellar heliumburning. In this paper, we reviewthe theoretical scheme, theexperimental technique, astrophysical applications and the future perspectives of such approach based on α-cluster transfer reactions.
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37

Broggini, Carlo. "Origin and status of LUNA at Gran Sasso". Modern Physics Letters A 29, n.º 34 (6 de novembro de 2014): 1430038. http://dx.doi.org/10.1142/s0217732314300389.

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The ultimate goal of nuclear astrophysics, the union of nuclear physics and astronomy, is to provide a comprehensive picture of the nuclear reactions which power the stars and, in doing so, synthesize the chemical elements. Deep underground in the Gran Sasso Laboratory the key reactions of the proton–proton chain and of the carbon–nitrogen–oxygen cycle have been studied down to the energies of astrophysical interest. The main results obtained in the past 20 years are reviewed and their influence on our understanding of the properties of the neutrino, the Sun, and the Universe itself is discussed. Finally, future developments of underground nuclear astrophysics beyond the study of hydrogen burning are outlined.
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38

Goriely, Stephane. "Nuclear Reaction Data Relevant to Nuclear Astrophysics". Journal of Nuclear Science and Technology 39, sup2 (agosto de 2002): 536–41. http://dx.doi.org/10.1080/00223131.2002.10875157.

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39

Prati, Paolo. "Underground Nuclear Astrophysics: pushing direct measurements toward the Gamow window". EPJ Web of Conferences 227 (2020): 01015. http://dx.doi.org/10.1051/epjconf/202022701015.

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The aim of experimental nuclear astrophysics is to provide information on the nuclear processes involved in astrophysical scenarios at the relevant energy range. However, the measurement of the cross section of nuclear reactions at low energies present formidable difficulties due to the very low reaction rates often overwhelmed by the background. Several approaches have been proposed and exploited to overcome such severe obstacles: in such frame, the idea to install a low energy - high intensity ion accelerator deep underground, to gain high luminosity while reducing the cosmic ray background, brought more than 25 years ago, to the pilot LUNA experiment. LUNA stands for Laboratory for Underground Nuclear Astrophysics: in the cave under the Gran Sasso mountain (in Italy) first a 50 kV and then a 400 kV single-ended accelerator for protons and alphas were deployed and produced plenty of data mainly on reactions of the H-burning phase in stars. Recently, similar facilities have been installed and/or proposed in other underground laboratories in US and China. LUNA as well is going to make a big step forward, with a new machine in the MV range which will be able to provide intense beams of protons, alphas and carbon ions. The rationale of underground nuclear astrophysics will be presented together with the last updates on the ongoing research programs.
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40

NAGAI, Yasuki. "Nuclear Astrophysics Studied by Neutrons". Journal of Plasma and Fusion Research 79, n.º 9 (2003): 884–90. http://dx.doi.org/10.1585/jspf.79.884.

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41

Misch, G. Wendell, Surja K. Ghorui, Projjwal Banerjee, Yang Sun e Matthew R. Mumpower. "Astromers: Nuclear Isomers in Astrophysics". Astrophysical Journal Supplement Series 252, n.º 1 (17 de dezembro de 2020): 2. http://dx.doi.org/10.3847/1538-4365/abc41d.

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42

Ferraro, F. "Underground Nuclear Astrophysics at LUNA". Acta Physica Polonica B 49, n.º 3 (2018): 429. http://dx.doi.org/10.5506/aphyspolb.49.429.

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43

Bemmerer, D., E. Grosse, A. R. Junghans, R. Schwengner e A. Wagner. "Nuclear Physics in Astrophysics III". Journal of Physics G: Nuclear and Particle Physics 35, n.º 1 (13 de dezembro de 2007): 010301. http://dx.doi.org/10.1088/0954-3899/35/1/010301.

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44

Descouvemont, P. "Cluster models in nuclear astrophysics". Journal of Physics G: Nuclear and Particle Physics 35, n.º 1 (13 de dezembro de 2007): 014006. http://dx.doi.org/10.1088/0954-3899/35/1/014006.

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45

Reifarth, René, Jan Glorius, Kathrin Göbel, Tanja Heftrich, Michael Jentschel, Beatriz Jurado, Franz Käppeler et al. "Reactor neutrons in nuclear astrophysics". EPJ Web of Conferences 146 (2017): 01003. http://dx.doi.org/10.1051/epjconf/201714601003.

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46

Broggini, Carlo, Daniel Bemmerer, Alessandra Guglielmetti e Roberto Menegazzo. "LUNA: Nuclear Astrophysics Deep Underground". Annual Review of Nuclear and Particle Science 60, n.º 1 (23 de novembro de 2010): 53–73. http://dx.doi.org/10.1146/annurev.nucl.012809.104526.

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47

Mukhamedzhanov, A. M., L. D. Blokhintsev, B. A. Brown, V. Burjan, S. Cherubini, C. A. Gagliardi, B. F. Irgaziev et al. "Indirect techniques in nuclear astrophysics". European Physical Journal A 27, S1 (março de 2006): 205–15. http://dx.doi.org/10.1140/epja/i2006-08-032-7.

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48

Descouvemont, Pierre. "Reaction models in nuclear astrophysics". EPJ Web of Conferences 117 (2016): 09001. http://dx.doi.org/10.1051/epjconf/201611709001.

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49

Champagne, A. E. "Amazing developments in nuclear astrophysics". European Physical Journal A 25, S1 (2 de junho de 2005): 623–28. http://dx.doi.org/10.1140/epjad/i2005-06-103-4.

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50

Bertulani, C. A., Shubhchintak, A. Mukhamedzhanov, A. S. Kadyrov, A. Kruppa e D. Y. Pang. "Indirect methods in nuclear astrophysics". Journal of Physics: Conference Series 703 (abril de 2016): 012007. http://dx.doi.org/10.1088/1742-6596/703/1/012007.

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