E. K. Warburton

First-forbidden beta decay: Meson-exchange enhancement of the axial charge at A~16.

Calculations are presented for four relatively strong first-forbidden [beta] decays in the region [ital A]=11--16 in order to study the very large mesonic-exchange-current enhancement of the rank-zero components. The [mu][sup [minus]] capture on [sup 16]O is considered on the same footing. The wave functions utilized include up to 4[h bar][omega] 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 [epsilon][sub exp]=1.61[plus minus]0.03 from three [beta][sup [minus]] decays and [mu][sup [minus]] capture on [sup 16]O, which is in excellent agreement with meson-exchange calculations in the soft-pion approximation.Calculations are presented for four relatively strong first-forbidden

Yrast decay schemes from heavy-ion + /sup 48/Ca fusion-evaporation reactions: IV: /sup 53/Cr, /sup 54/V, /sup 62/Co, and /sup 61hyphen63/Ni

beta

New calculations of the parity nonconservation matrix element for the J pi T 0(+)1, 0(-)1 doublet in 14N.

decays in the region A=11-16 in order to study the very large mesonic-exchange-current enhancement of the rank-zero components. The

First-forbidden [beta] decay: Meson-exchange enhancement of the axial charge at [ital A][similar to]16

mu^-

New calculations of the parity nonconservation matrix element for the [ital J][sup [pi]][ital T] 0[sup +]1, 0[sup [minus]]1 doublet in [sup 14]N

capture on

A New Look to the Nuclear Structure Calculations of the PNC Cases in A=18-21 Nuclei

^{16}

First-Forbidden beta decay: Medium enhancement of the axial charge at A=16

O is considered on the same footing. The wave functions utilized include up to 4

Mass systematics for A=29-44 nuclei: The deformed A ~ 32 region

hbaromega

Gamow-Teller beta-decay rates for A <= 18 nuclei.

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

Yrast decay schemes from heavy ion + /sup 48/Ca fusion-evaporation reactions. I. /sup 54/ /sup 56/Mn, /sup 56/Cr, and /sup 52/ /sup 53/V. [Branching, J,. pi. , lifetimes]

epsilon_{exp}