Abstract
The general question of the analysis of beta-delayed particle emission is discussed. It is emphasized that neither an integrated Fermi function nor a beta branching ratio is, in general, rigorously defined for beta decay to a specific level (resonance). As an example, spectra of breakup α particles observed following (Be and (Be are analyzed by the many-level one-channel approximation of R-matrix theory. In addition, the L=2 α-α elastic scattering phase shifts are analyzed up to =34 MeV. It is found that satisfactory fits are obtained without introducing intruder states below 26-MeV excitation. Gamow-Teller matrix elements are extracted for decay to the 3.0-MeV first-excited state of and for the doublet near 16 MeV. The width and location of the 3.0-MeV state are also obtained. The results are compared to shell-model predictions.
- Received 25 September 1985
DOI:https://doi.org/10.1103/PhysRevC.33.303
©1986 American Physical Society