Observation of Fine Structure in Nuclear Level Densities and {bold {gamma}}-Ray Strength Functions

Journal Article · Sun Sep 01 00:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.2404· OSTI ID:383880

Tveter, T S; Bergholt, L; Guttormsen, M; Melby, E; Rekstad, J ^[1]

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1. Department of Physics, University of Oslo, Box 1048 Blindern, N-0316 Oslo (Norway)

An iterative procedure for simultaneous extraction of fine structure in the level density and the {gamma}-ray strength function from a set of primary {gamma}-ray spectra has been developed. Data from the reactions {sup 163}Dy({sup 3}He,{alpha}{gamma}){sup 162}Dy and {sup 173}Yb({sup 3}He,{alpha}{gamma}){sup 172}Yb reveal steplike enhancements in the level density in the region below 5 MeV and peaks in the {gamma}-ray strength function at low {gamma} energy ({ital E}{sub {gamma}}{approx_equal}2{endash}3.5 MeV). Tentative physical interpretations are presented. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 383880
• Journal Information: Physical Review Letters, Vol. 77, Issue 12; Other Information: PBD: Sep 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ENERGY-LEVEL DENSITY
FINE STRUCTURE
GAMMA RADIATION
STRENGTH FUNCTIONS
DYSPROSIUM 163 TARGET
HELIUM 3 REACTIONS
YTTERBIUM 173 TARGET
GAMMA SPECTRA
DYSPROSIUM 162
YTTERBIUM 172 TARGET