München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 44: Kern- und Teilchen-Astrophysik

HK 44.1: Vortrag

Donnerstag, 23. März 2006, 14:00–14:15, E

QRPA calculations of weak-interaction rates for pre-supernova evolution of massive stars — •B. Pfeiffer¹, S. Gupta^2,3, P. Möller⁴, H. Schatz^2,3, and K.-L. Kratz¹ — ¹Inst. für Kernchemie & HGF-VISTARS, Univ. Mainz, Germany — ²NSCL/MSU, USA — ³JINA — ⁴T-16, LANL, USA

Ground-state and excited-state GT strength distributions and temperature-dependent electron-capture rates for a number of key Fe-group nuclei, relevant to the pre-supernova (SN) evolution of massive stars, have been calculated using the deformed QRPA (Folded-Yukawa, Lipkin-Nogami) theory. We compare our results with previous shell-model diagonalization and QRPA (Nilsson, BCS) calculations. The inclusion of our new rates in SN evolution codes is foreseen.