1. Gamow-Teller strength for the analog transitions to the first T=1/2, J^pi=3/2- states in 13C and 13N and the implications for Type Ia supernovae
- Author
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Zegers, R. G. T., Brown, E. F., Akimune, H., Austin, Sam M., Berg, A. M. van den, Brown, B. A., Chamulak, D. A., Fujita, Y., Fujiwara, M., Gal`es, S., Harakeh, M. N., Hashimoto, H., Hayami, R., Hitt, G. W., Itoh, M., Kawabata, T., Kawase, K., Kinoshita, M., Nakanishi, K., Nakayama, S., Okamura, S., Shimbara, Y., Uchida, M., Ueno, H., Yamagata, T., and Yosoi, M.
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Nuclear Experiment - Abstract
The Gamow-Teller strength for the transition from the ground state of 13C to the T=1/2, J^pi=3/2- excited state at 3.51 MeV in 13N is extracted via the 13C(3He,t) reaction at 420 MeV. In contrast to results from earlier (p,n) studies on 13C, a good agreement with shell-model calculations and the empirical unit cross section systematics from other nuclei is found. The results are used to study the analog 13N(e-,v_e)13C reaction, which plays a role in the pre-explosion convective phase of type Ia supernovae. Although the differences between the results from the (3He,t) and (p,n) data significantly affect the deduced electron-capture rate and the net heat-deposition in the star due to this transition, the overall effect on the pre-explosive evolution is small., Comment: 11 pages, 4 figures
- Published
- 2007
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