J. Barrette

Measurement of the static quadrupole moments of the first 2+ states in 76Se, 78Se, 80Se and 82Se☆

Abstract The reorientation effect in Coulomb excitation was employed to measure the static quadrupole moments of the first 2 + excited states in 76 Se, 78 Se, 80 Se, and 82 Se. Beams of 4 He and 16 O were used on thin highly enriched targets and the resulting spectra of the well resolved backward elastic and inelastic scattered particles were detected by four surface-barrier detectors. For constructive interference via the second 2 + excited states the determined quadrupole moments are: −0.34±0.07 e· b for 76 Se ; −0.26±0.09 e· b for 78 Se ; −0.31±0.07 e· b for 80 Se ; −0.22±0.07 e· b for 82 Se .

Search for the parity-forbidden heavy-particle width Γ′dα of the Ex = 3.562 MeV state in 6Li

Abstract Alpha-particle capture by deuterium has been investigated at excitation energies in 6 Li close to the J π = 0 + , T = 1, E x , = 3.562 MeV state. A search for resonance γ-rays from this state has yielded a negative result and an upper limit for the heavy-particle width Γ ′ d α ≦ 0.017 eV.