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

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.

11 pages, 4 figures

References in corpus (4)

• Rates and properties of type Ia supernovae as a function of mass and star-formation in their host galaxies
• Neutronization During Type Ia Supernova Simmering
• On the extraction of weak transition strengths via the (3He,t) reaction at 420 MeV
• Measurement of the Gamow-Teller Strength Distribution in 58Co via the 58Ni(t,3He) reaction at 115 MeV/nucleon

Cited by in corpus (6)

• Gamow-Teller Unit Cross Sections for (t,3He) and (3He,t) Reactions
• Type Ia Supernovae keep memory of their progenitor metallicity
• Spectroscopy of 13B via the 13C(t,3He) reaction at 115 AMeV
• Spectroscopy of 24Al and extraction of Gamow-Teller strengths with the 24Mg(3He,t) reaction at 420 MeV
• Exploring the Carbon Simmering Phase: Reaction Rates, Mixing, and the Convective Urca Process
• Description of ${}^{93}$Nb stellar electron-capture rates by the Projected Shell Model