({gamma},n) study of the isovector quadrupole resonance in {sup 40}Ca
- The School of Physics, University of Melbourne, Parkville, Victoria, 3052 (Australia)
- Department of Physics, University of Lund, Soelvegatan 14, S--223 62 Lund (Sweden)
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ (United Kingdom)
The forward-to-backward asymmetry of neutrons emitted in the {sup 40}Ca({gamma},n{sub 0}) reaction was measured at photon energies in the range of 27{endash}50 MeV. An energy-dependent asymmetry was observed that is interpreted as evidence of interference between the isovector quadrupole resonance and the giant dipole resonance. Data analysis in terms of semiclassical and direct-semidirect models estimate the isovector quadrupole resonance to be at an excitation energy of 31.0{plus_minus}1.5 MeV, with a width of 16.0{plus_minus}1.5 MeV, and exhausting most of the energy-weighted sum rule for the isovector quadrupole resonance. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 512815
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 55; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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