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Browsing by Subject "nucleosynthesis"

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  • Rauscher, T. (American Institute of Physics, 2010)
    The relevant energy ranges for stellar nuclear reactions are introduced. Low-energy compound and direct reactions are discussed. Stellar modifications of the cross sections are presented. Implications for experiments are outlined.
  • Freiburghaus, C.; Rembges, J.F.; Rauscher, T.; Kolbe, E.; Thielemann, Friedrich-Karl; Kratz, K.L.; Pfeiffer, B.; Cowan, J.J. (1999-05-01)
    The rapid neutron-capture process (r-process) encounters unstable nuclei far from beta-stability. Therefore its observable features, like the abundances, witness (still uncertain) nuclear structure as well as the conditions ...
  • Yalcin, C.; Gueray, R. T.; Oezkan, N.; Kutlu, S.; Gyuerky, Gy.; Farkas, J.; Kiss, G. G.; Fueloep, Zs.; Rauscher, T.; Somorjai, E. (American Institute of Physics, 2009)
    The cross sections of (113)In(alpha, gamma)(117)Sb and (113)In(alpha,n)(116)Sb reactions have been measured using the activation method. The experiments were carried out at the ATOMKI cyclotron accelerator in the center ...
  • Skakun, Ye; Rauscher, T. (American Institute of Physics, 2010)
    Astrophysical S-factors of (p,n) reactions on (99)Ru, (100)Ru, (101)Ru, and (102)Ru were derived from the sum of experimental isomeric and ground states cross sections measured in the incident proton energy range of 5-9 ...
  • Gallagher, A.J.; Ryan, Sean G.; Garcia Perez, A.E.; Aoki, W. (2010)
    Context: Current theory regarding heavy element nucleosynthesis in metal-poor environments states that the r-process would be dominant. The star HD 140283 has been the subject of debate after it appeared in some studies ...
  • Rauscher, T.; Thielemann, Friedrich-Karl; Gorres, J.; Wiescher, M. (2000-08-14)
    The reaction rates for ct capture processes on self-conjugate nuclei in the mass range A = 20-40 have been investigated. The rates were calculated using the statistical model code NON-SMOKER taking into account isospin ...
  • Loens, H. P.; Langanke, K.; Martinez-Pinedo, G.; Rauscher, T.; Thielemann, Friedrich-Karl (2008-09-04)
    Microscopic calculations show a strong parity dependence of the nuclear level density at low excitation energy of a nucleus. Previously, this dependence has either been neglected or only implemented in the initial and final ...
  • Skakun, Ye.; Rauscher, T. (American Institute of Physics, 2008)
    Astrophysical S-factors for (p,n) reactions on stable Pd isotopes derived from experimental cross sections were compared to statistical model predictions with the NON-SMOKER code. Satisfactory agreement was found. Reaction ...
  • Rauscher, T. (2012-08-10)
    A general formalism to include experimental reaction cross sections into calculations of stellar rates is presented. It also allows us to assess the maximally possible reduction of uncertainties in the stellar rates by ...
  • Marrone, S.; Abbondanno, U.; Aerts, G.; Alvarez, H.; Alvarez-Velarde, F.; Andriamonje, S.; Andrzejewski, J.; Assimakopoulos, P.; Audouin, L.; Badurek, G.; Baumann, P.; Bevcar, F.; Berthoumieux, E.; Calvino, F.; Cano-Ott, D.; Capote, R.; De Albornoz, A. Carrillo; Cennini, P.; Chepell, V.; Chiaveri, E.; Colonna, N.; Cortes, G.; Couture, A.; Cox, J.; David, S.; Dolfini, R.; Domingo-Pardo, C.; Dahlfors, M.; Dridi, W.; Duran, I.; Eleftheriadis, C.; Embid-Segura, M.; Ferrant, L.; Feffari, A.; Ferreira-Marques, R.; Fitzpatrick, L.; Frais-Koelb, H.; Fujii, K.; Furman, W.; Guerrer, C.; Goncalves, I.; Goverdovski, A.; Gramegna, F.; Griesmayer, E.; Gunsing, F.; Haas, B.; Haight, R.; Heil, M.; Herrera-Martinez, A.; Igashira, M.; Isaev, S.; Jericha, E.; Kadi, Y.; Kappeler, F.; Karamanis, D.; Karadimos, D.; Kerveno, M.; Ketlerov, V.; Koehler, P.; Konovalov, V.; Kossionides, E.; Krticka, M.; Lamboudis, C.; Leeb, H.; Lindote, A.; Lopes, I.; Lozano, M.; Lukic, S.; Marganiec, J.; Marques, L.; Mastinu, P.; Mengoni, A.; Milazzo, P. M.; Moreau, C.; Mosconi, M.; Neves, F.; Oberhummer, H.; O'Brien, S.; Oshima, M.; Pancin, J.; Papachristodoulou, C.; Papadopoulos, C. T.; Paradela, C.; Patronis, N.; Pavlik, A.; Pavlopoulos, P.; Perrot, L.; Plag, R.; Plompen, A.; Plukis, A.; Poch, A.; Pretel, C.; Quesada, J.; Rauscher, T.; Reifarth, R.; Rosetti, M.; Rubbia, C.; Rudolf, G.; Rullhusen, P.; Salgado, J.; Sarchiapone, L.; Savvidis, I.; Stephan, C.; Tagliente, G.; Tain, J. L.; Tassan-Got, L.; Tavora, L.; Terlizzi, R.; Dillmann, I.; Vannini, G.; Vaz, P.; Ventura, A.; Villamarin, D.; Vincente, M. C.; Vlachoudis, V.; Vlastou, R.; Voss, F.; Walter, S.; Wendler, H.; Wiescher, M.; Wisshak, K. (American Institute of Physics, 2006)
    The accurate knowledge of the Sm-151(n,gamma) cross section has important implications for the nuclear technologies as well as for fundamental studies. Due to its radioactivity, the only experimental data available on ...
  • Cyburt, Richard H.; Amthor, A. Matthew; Ferguson, Ryan; Meisel, Zach; Smith, Karl; Warren, Scott; Heger, Alexander; Hoffman, R. D.; Rauscher, T.; Sakharuk, Alexander; Schatz, Hendrik; Thielemann, Friedrich-Karl; Wiescher, Michael (2010-07)
    We present results from the JINA REACLIB project, an ongoing effort to maintain a current and accurate library of thermonuclear reaction rates for astrophysical applications. Ongoing updates are transparently documented ...
  • Rauscher, T. (2004-02)
    This overview discusses issues relevant to modeling nucleosynthesis in type II supernovae and implications of detailed studies of the ejecta. After a brief presentation of the most common approaches to stellar evolution ...
  • Gallagher, Andrew James (2012-11-22)
    The principal theory concerning the origin of the elements heavier than the Fe-peak, such as Ba, strongly suggest that for old, metal-poor environments, the rapid (r-) process is the most likely path taken in their ...
  • Panov, I. V.; Korneev, I. Yu; Rauscher, T.; Martinez-Pinedo, G.; Kelic-Heil, A.; Zinner, N. T.; Thielemann, Friedrich-Karl (2010-04)
    Neutron-induced reaction rates, including fission and neutron capture, are calculated in the temperature range 10(8)
  • Oberhummer, H.; Herndl, H.; Rauscher, T.; Beer, H. (1996-11)
    Neutron-induced nucleosynthesis plays an important role in astrophysical scenarios like in primordial nucleosynthesis in the early universe, in the s-process occurring in Red Giants, and in the cu-rich freeze-out and ...
  • Thielemann, Friedrich-Karl; Argast, D.; Brachwitz, F.; Martinez-Pinedo, G.; Rauscher, T.; Liebendoerfer, M.; Mezzacappa, A.; Hoflich, P.; Nomoto, K. (2002)
    Two of the basic building blocks of galaxies are stars and the interstellar medium. The evolution of the abundance composition in the latter and especially the enrichment of heavy elements as a function of space and time ...
  • Nomoto, Ken'ichi; Tominaga, Nozomu; Umeda, Hideyuki; Kobayashi, C.; Maeda, Keiichi (2006-10-17)
    We present new nucleosynthesis yields as functions of the stellar mass, metallicity, and explosion energy (corresponding to normal supernovae and hypernovae). We apply the results to the chemical evolution of the solar ...
  • Rauscher, T.; Mohr, P.; Dillmann, I.; Plag, R. (2011-09-10)
    Modern models of s-process nucleosynthesis in stars require stellar reaction rates of high precision. Most neutron-capture cross-sections in the s-process have been measured, and for an increasing number of reactions the ...
  • Rauscher, T. (2011-05)
    This review focuses on nuclear reactions in astrophysics and, more specifically, on reactions with light ions (nucleons and alpha particles) proceeding via the strong interaction. It is intended to present the basic ...
  • Rauscher, T.; Froehlich, C. (American Institute of Physics, 2012)
    Although the detailed conditions for explosive nucleosynthesis are derived from astrophysical modeling, nuclear physics determines fundamental patterns in abundance yields, not only for equilibrium processes. Focussing on ...

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