First-Forbidden beta decay: Medium enhancement of the axial charge at A=16
| dc.creator | Warburton, E. K. | |
| dc.creator | Towner, I. S. | |
| dc.creator | Brown, B. A. | |
| dc.date | 1993-09-10 | |
| dc.date.accessioned | 2026-07-07T11:15:07Z | |
| dc.date.available | 2026-07-07T11:15:07Z | |
| dc.description | Calculations are presented for four relatively strong first-forbidden $β$ decays in the region A=11-16 in order to study the very large mesonic-exchange-current enhancement of the rank-zero components. The $μ^-$ capture on $^{16}$O is considered on the same footing. The wave functions utilized include up to 4$\hbarω$ excitations. Two-body exchange-current matrix elements are calculated as well as one-body impulse approximation matrix elements. The resultant enhancement factor that multiplies the impulse-approximation axial-charge matrix element is thereby determined by comparison to experiment to be $ε_{exp}$ = 1.61 $\pm$ 0.03 from three $β^-$ decays and $μ^-$ capture on $^{16}$O, which is in excellent agreement with meson-exchange calculations in the soft-pion approximation. | |
| dc.description | 17pages double columned, RevteX, Four figures not included, available from Towner at Chalk River Laboratories | |
| dc.identifier | https://arxiv.org/abs/nucl-th/9309014 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/9309014 | |
| dc.identifier | Phys.Rev.C49:824-839,1994 | |
| dc.identifier | doi:10.1103/PhysRevC.49.824 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/192294 | |
| dc.subject | Nuclear Theory | |
| dc.title | First-Forbidden beta decay: Medium enhancement of the axial charge at A=16 | |
| dc.type | text |