Giant dipole resonance built on highly excited states of {sup 120}Sn nuclei populated by inelastic {alpha} scattering

Journal Article · Fri Mar 01 04:00:00 UTC 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.76.2025· OSTI ID:286147

Ramakrishnan, E; Baumann, T; Azhari, A; Kryger, R A; Pfaff, R; Thoennesen, M; Yokoyama, S ^[1]; Beene, J R; Halbert, M L; Mueller, P E; Stracener, D W; Varner, R L ^[2]; Charity, R J; Dempsey, J F; Sarantites, D G; Sobotka, L G ^[3]

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1. National Superconducting Cyclotron Laboratory and Department of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States)
2. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
3. Department of Chemistry, Washington University, St. Louis, Missouri 63130 (United States)

High energy {gamma} rays from the decay of the giant resonance in hot {sup 120}Sn nuclei were measured in the excitation energy range of 30{endash}130 MeV. The excited nuclei were populated by inelastic scattering of {alpha} particles at 40 and 50 MeV/nucleon. The resonance width was observed to increase monotonically with increasing excitation energy, from 5 MeV at the ground state to {approximately}12 MeV at the largest excitation energy. Inelastic scattering predominantly populates low angular momentum states, and the observed width increase is thus attributed to fluctuations in the nuclear shape induced by temperature. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-84OR21400; FG02-88ER40406; FG02-87ER40316
• OSTI ID: 286147
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 76; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALPHA REACTIONS
ANGULAR MOMENTUM
DIPOLES
EXCITATION
EXCITED STATES
FLUCTUATIONS
GAMMA RADIATION
GIANT RESONANCE
INELASTIC SCATTERING
TIN 120