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Particle coupling to the octupole state in 89Sr from 88Sr(p,p')88Sr analog resonances and 88Sr(d,p)89Sr
Authors:DC Slater  ER Cosman  DJ Pullen
Institution:1. Department of Physics and Applied Physics, Lowell Technological Institute, Lowell, MassachusettsUSA;2. Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104 USA
Abstract:A study has been made of the six most pronounced isobaric analog resonances in the 88Sr(p, p')88Sr (3?) excitation function at Ep = 7.65, 7.80, 7.92, 8.78, 9.75, and 9.90 MeV. They are believed to have a simple structure in the parent nucleus 89Sr consisting of the lowlying positive-parity, single-neutron spectrum of 89Sr weakly coupled to the collective 3? state in 88Sr. A high-resolution 88Sr(d, p)89Sr experiment was performed to locate small 2f and 3p admixed fragments in 89Sr which would allow these analog resonances their entrance widths. In addition, on-resonance 88Sr(p, p')88Sr (3?) angular distributions were measured in order to determine the partial waves involved in the exit channel. Results are compared to a particlephonon coupling model, and overall selectivity, strengths, and angular distributions of the (p, p') analog resonances are consistent with the above interpretation.
Keywords:Nuclear reactions
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