un 2 00 4 Supernova Neutrino - Nucleus Physics and the r - process
نویسنده
چکیده
This talk reviews three inputs important to neutrino-induced nu-cleosynthesis in a supernova: 1) " standard " properties of the super-nova neutrino flux, 2) effects of phenomena like neutrino oscillations on that flux, and 3) nuclear structure issues in estimating cross sections for neutrino-nucleus interactions. The resulting possibilities for neutrino-induced nucleosynthesis – or the ν-process – in massive stars are discussed. This includes two relatively recent extensions of ν-process calculations to heavier nuclei, one focused on understanding the origin of 138 La and 180 Ta and the second on the effects following r-process freezeout. From calculations of the neutrino post-processing of the r-process distribution, limits can be placed on the neutrino fluence after freezeout and thus on the dynamic timescale for the expansion.
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