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Astrophysical conditions for an r-process in the high-entropy wind scenario of type II supernovae
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 110334
Author(s) Farouqi, K.; Freiburghaus, C.; Kratz, K.-L.; Pfeiffer, B.; Rauscher, T.; Thielemann, F.-K.
Author(s) at UniBasel Thielemann, Friedrich-Karl
Rauscher, Thomas
Year 2005
Title Astrophysical conditions for an r-process in the high-entropy wind scenario of type II supernovae
Journal Nuclear physics. A, Nuclear and hadronic physics
Volume 758
Number Sp. Iss. SI
Pages / Article-Number 631-4
Abstract

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 <= 0.5.

Publisher North Holland
ISSN/ISBN 0375-9474
edoc-URL http://edoc.unibas.ch/dok/A5253962
Full Text on edoc No
Digital Object Identifier DOI 10.1016/j.nuclphysa.2005.05.187
ISI-Number INSPEC:8699220
Document type (ISI) Journal Paper
 
   

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