Phys. Rev. C 77, 024307 (2008) [10 pages]Gamow-Teller strength for the analog transitions to the first T=1/2,Jπ=3/2- states in 13C and 13N and the implications for type Ia supernovaeReceived 12 October 2007; published 21 February 2008 The Gamow-Teller strength for the transition from the ground state of 13C to the T=1/2,Jπ=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-,νe)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 resulting from this transition, the overall effect on the pre-explosive evolution is small. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.77.024307
DOI:
10.1103/PhysRevC.77.024307
PACS:
21.60.Cs, 24.50.+g, 25.40.Kv, 25.55.-e
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