New Approaches To Nuclear Level Densities Through Particle Emission Measurements

Journal Article · Tue Aug 26 04:00:00 EDT 2003 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1619723· OSTI ID:20632587

Haight, R C; Rochman, D; O'Donnell, J M; Devlin, M ^[1]

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1. Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

With the intense spallation neutron source at the Los Alamos Neutron Science Center (LANSCE), new approaches to nuclear level densities are being explored through neutron-induced reactions and measurements of the resultant particle emission. This continuous-in-energy neutron source has been used to study Ericson fluctuations, charged-particle emission cross sections and spectra, gamma-ray production and, recently, neutron emission. Examples of each will be discussed. The FIGARO array of neutron and gamma-ray detectors has been developed in the past year to allow measurement of neutron emission in a 'double time-of-flight' experiment. The incident neutron energy is determined by time-of-flight over a 21-meter flight path with gamma rays from the induced reaction. Neutron emission spectra from this reaction are then measured by time-of-flight over a flight path of typically 1 meter. Data on 28Si(n,n') are presented, and the relevance to determination of nuclear level densities is discussed.

• OSTI ID: 20632587
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 680; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGED PARTICLES
CROSS SECTIONS
ENERGY-LEVEL DENSITY
ENERGY-LEVEL TRANSITIONS
ERICSON THEORY
GAMMA DETECTION
GAMMA RADIATION
NEUTRON DETECTORS
NEUTRON EMISSION
NEUTRON SOURCES
SPALLATION
TIME-OF-FLIGHT METHOD