Study of isovector charge-exchange excitations and their decay via the 16O(3He, tp) reaction

Autor: W.A. Sterrenburg, S. Brandenburg, J.H. van Dijk, A.G. Drentje, M.B. Greenfield, M.N. Harakeh, H. Riezebos, H. Sakai, W. Segeth, S.Y. van der Werf, A. van der Woude
Rok vydání: 1984
Předmět:
Zdroj: Nuclear Physics A. 420:257-284
ISSN: 0375-9474
DOI: 10.1016/0375-9474(84)90442-1
Popis: The nucleus 16F was studied via the 16O(3He, t) reaction at 81 MeV. Differential cross sections for many states were obtained and interpreted with DWBA calculations, using microscopic wave functions and an effective projectile-nucleon interaction. Proton decay to several states in 15O was observed and angular correlations for protons in coincidence with tritons detected at θ = 0° were measured. Several spin-parity assignments have been made. The distribution of isovector ΔL = 1 strength could be deduced. The analog of the giant dipole resonance ( E x ⋍ 9.5 MeV ) is strongly excited. The magnetic quadrupole strength has two strong components, one low, at Ex = 0.424 MeV, and one high, at E x ⋍ 7.5 MeV . Evidence is given for a proportionality between cross section and M2 strength for transitions to Jπ = 2− states, which possibly make the (3He, t) reaction a suitable tool for determining quantitatively isovector M2 (or Bij) strengths.
Databáze: OpenAIRE