Abstract
Abstract The radiative decay properties of the first 16 bound states in 17 N with E x 11 B ( 7 Li, p γ) 17 N reaction at E = 6 MeV. Proton-gamma coincidence data were taken with an annular particle detector located at 180° and a Ge(Li) detector placed at θ γ = 3°, 45° and 90°. Angular distributions, branching ratios and Doppler shifts were measured. The resulting energies (keV), lifetimes (fs) and spin-parity assignments (those in brackets are probable assignments) were: (1374, 93±35, 3 2 − ), (1850, > 1 ps , 1 2 + ), (1907, > 1 ps , ( 5 2 − )), (2526, > 1 ps , ( 5 2 + )), (3129, 275±80, ( 7 2 − )), (3203, 3 2 − )), (3629, > 1 ps , ( 9 2 − )), (3663, 7 2 − )), (4006, 3 2 + )), (4208, 3 2 − )), (5770, . The properties of these levels are interpreted in terms of a weak coupling model in which a p 1 2 proton hole is coupled to levels in 18 O or two proton holes are coupled to the K = 1 2 + g.s. band in 19 F. A shell model calculation which includes 2p-1h negative parity states and 3p-2h positive parity states is also shown to provide a reasonable description of the bound states of 17 N.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call