Astrophysical conditions for an r-process in the high-entropy wind scenario of type II supernovae

K. Farouqi, C. Freiburghaus, K. L. Kratz, B. Pfeiffer, T. Rauscher, Friedrich-Karl Thielemann

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16 Citations (Scopus)


Within a full dynamical parameter study including freezeout effects, we have determined the astrophysical conditions for an r-process in the so-called "neutrino-wind" scenario of core-collapse type II supernovae (SNII). We have started our calculations after the total photo disintegration of the matter above the nascent neutron star at 9 (.) 101 Kelvin with protons and neutrons. We have used the charged-particle network of Thielemann and the r-process code of Freiburghaus, combined with the NON-SMOKER neutron-capture rates of Rauscher, nuclear masses from the ETFS1-Q mass model and recent experimental and theoretical gross beta-decay properties. Using the three parameters V-exp (expansion speed of the shock wave), S (entropy of the bubble) and the neutron-to-proton ratio Y-e, we show that the above quantities have to fulfill specific conditions in order to make a successful r-process. According to observations and hydrodynamical simulations, respectively, a realistic value for V-exp is 7500 km/s, and Y-e

Original languageEnglish
Pages (from-to)631C-634C
Number of pages4
JournalNuclear Physics A
Publication statusPublished - 25 Jul 2005
Event8th International Symposium on Nucle in the Cosmos (NIC8) - Vancouver, Canada
Duration: 19 Jul 200423 Jul 2004


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