Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 19: Nukleare Astrophysik I

HK 19.1: Gruppenbericht

Dienstag, 16. März 2010, 14:00–14:30, HG VI

Exploiting the superior resolution of the Munich Q3D spectrograph for nuclear astrophysics — •Anuj Parikh1, Thomas Faestermann1, Ralf Hertenberger2, Reiner Krücken1, Hans Wirth2, Thomas Behrens1, Vinzenz Bildstein1, Shawn Bishop1, Alan Chen3,4, Jason Clark5, Catherine Deibel5,6, Katrin Eppinger1, Clemens Herlitzius1, Christoph Hinke1, Olga Lepyoshkina1, Peter Maierbeck1, Georg Rugel1, Dominik Seiler1, Kiana Setoodehnia4, Kathrin Wimmer1, and Chris Wrede71Physik Department E12, TU-München — 2Fakultät für Physik, LMU-München — 3Excellence Cluster Universe, TU-München — 4Department of Physics and Astronomy, McMaster Univ. — 5Physics Division, Argonne — 6JINA, Michigan State Univ. — 7CENPA, Univ. Washington

Classical novae are unique in nuclear astrophysics because most of the involved reaction rates are constrained by experiments. This allows one to judge which measurements are still necessary to improve the nuclear physics input to models. In this context, the 30P(p,γ)31S reaction rate needs to be better determined over nova temperatures. Direct measurements of this reaction are not possible yet, and so indirect techniques must be used. There has been significant recent activity on this issue, but difficulties have been encountered in nuclear spectroscopy studies (e.g., 31P(3He,t)31S) due to experimental energy resolution. For this and other reactions, we discuss recent measurements using the superior resolution of the Munich Q3D spectrograph (ΔE/E≈2 x 10−4) that can improve determinations of thermonuclear rates.

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