Pion elastic and inelastic 2{sup +}{sub 1} scattering on {sup 58,60,62,64}Ni at {ital T}{sub {pi}}=180 MeV
- Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Department of Physics, New Mexico State University, Las Cruces, New Mexico 88003 (United States)
- Department of Physics, University of Texas, Austin, Texas 78712 (United States)
- Physics Department, University of York, Heslington, York Y015DD (United Kingdom)
Angular distributions for {pi}{sup +} and {pi}{sup {minus}} elastic and inelastic scattering from the {ital Z}=28 closed-proton-shell nuclei {sup 58,60,62,64}Ni have been measured at an incident pion kinetic energy of 180 MeV. Values for the neutron and proton matrix elements for the transition to the {ital J}{sup {pi}}=2{sup +}{sub 1} state have been extracted using the distorted wave impulse approximation in which the {pi}{sup +} and {pi}{sup {minus}} data were fitted simultaneously and the neutron and proton vibrational transition strengths were treated as free parameters. While all transitions are predominantly collective, extracted values of {ital M}{sub {ital n}}/{ital M}{sub {ital p}} indicate increasing collectivity as a function of neutron number and are consistent with the collective limit of {ital N}/{ital Z} for {sup 64}Ni. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 279117
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 53; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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