Abstract
The decay of ms) has been observed in two experiments at the TISOL facility at TRIUMF employing different detector configurations for each run. In the first of two papers [E. Gete et al., Phys. Rev. C 61, 064310 (2000)], the experimental technique and data analysis were described. Phenomenological branching ratios and Gamow-Teller strengths were then deduced. In this paper, the data are analyzed using a multichannel, multistate approach which leads to a different interpretation of the spectra and therefore modified state energies, widths, branching ratios, and Gamow-Teller strengths. Difficulties in fitting the second excited state of at 2.34 MeV and possible modifications to the penetrability are described. The existence of a state at about 5 MeV excitation energy is suggested from the fits, as well as a considerable decay strength from the ground state at high energies. Consequences for the properties of the nuclear system are then discussed; in particular, it is shown that the data agree qualitatively with shell model predictions without unusual Gamow-Teller strength present at high excitation energies. Finally, an estimate of the stellar reaction rate is given.
- Received 22 June 2000
DOI:https://doi.org/10.1103/PhysRevC.63.034303
©2001 American Physical Society