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

        Author
        Farouqi, K.
        Freiburghaus, C.
        Kratz, K. L.
        Pfeiffer, B.
        Rauscher, T.
        Thielemann, Friedrich-Karl
        Attention
        2299/10380
        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
        Publication date
        2005-07-25
        Published in
        Nuclear Physics A
        Published version
        https://doi.org/10.1016/j.nuclphysa.2005.05.187
        Other links
        http://hdl.handle.net/2299/10380
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