Improved Nuclear Level Densities via Identification of Spurious Levels

An accurate value of the nuclear resonance spacing is crucial for determination of level densities. Level densities are key input for the calculation of nuclear reaction rates and cross sections. This paper discusses various effects that can adversely impact the average level spacing, with special e...

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Bibliographic Details
Main Authors: Agvaanluvsan, U, Mitchell, G E, Dashdorj, D, Frankle, C M, Lokitz, S L, Shriner Jr, J F
Format: Conference Proceeding
Language:English
Subjects:
CALCIUM 44 TARGET
ENERGY LEVELS
ENERGY-LEVEL DENSITY
NEUTRON REACTIONS
NEUTRONS
NUCLEAR PHYSICS AND RADIATION PHYSICS
PROTON REACTIONS
PROTON-NUCLEON INTERACTIONS
PROTONS
RESONANCE
S WAVES
SPIN
URANIUM 238 TARGET
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Summary:An accurate value of the nuclear resonance spacing is crucial for determination of level densities. Level densities are key input for the calculation of nuclear reaction rates and cross sections. This paper discusses various effects that can adversely impact the average level spacing, with special emphasis on the issue of quantum number assignment. The most striking property of spacings of resonances with the same quantum number is level repulsion. We investigate how a simple test based on level repulsion can be used in the identification of spin misassignment and provide new experimental verification of the proposed test. Proton resonances obtained in the 44Ca+p reaction are used as an example. In addition, s-wave neutron resonances in the 238U+n reaction are considered.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.1945214