Study of the Photon Strength Functions for Gadolinium Isotopes with the DANCE Array

Journal Article · Tue Mar 10 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3120134· OSTI ID:21289628

Dashdorj, D; Mitchell, G E; Baramsai, B; Chankova, R; Chyzh, A; Walker, C ^[1]; Agvaanluvsan, U ^[2]; Becker, J A; Parker, W; Sleaford, B; Wu, C Y ^[3]; Bredeweg, T A; Couture, A; Haight, R C; Jandel, M; Rundberg, R S; Ullmann, J L; Vieira, D J; Wouters, J M ^[4]; Krticka, M ^[5]

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1. North Carolina State University, Raleigh, NC 27695 and Triangle Universities Nuclear Laboratory, Durham, NC 27708 (United States)
2. Stanford University, Palo Alto, CA 94305 (United States)
3. Lawrence Livermore National Laboratory, Livermore, CA 94551 (United States)
4. Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
5. Charles University in Prague, CZ-180 00 Prague 8 (Czech Republic)

The gadolinium isotopes are interesting for reactor applications as well as for medicine and astrophysics. The gadolinium isotopes have some of the largest neutron capture cross sections. As a consequence they are used in the control rod in reactor fuel assembly. From the basic science point of view, there are seven stable isotopes of gadolinium with varying degrees of deformation. Therefore they provide a good testing ground for the study of deformation dependent structure such as the scissors mode. Decay gamma rays following neutron capture on Gd isotopes are detected by the DANCE array, which is located at flight path 14 at the Lujan Neutron Scattering Center at Los Alamos National Laboratory. The high segmentation and close packing of the detector array enable gamma-ray multiplicity measurements. The calorimetric properties of the DANCE array coupled with the neutron time-of-flight technique enables one to gate on a specific resonance of a specific isotope in the time-of-flight spectrum and obtain the summed energy spectrum for that isotope. The singles gamma-ray spectrum for each multiplicity can be separated by their DANCE cluster multiplicity. Various photon strength function models are used for comparison with experimentally measured DANCE data and provide insight for understanding the statistical decay properties of deformed nuclei.

• OSTI ID: 21289628
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1099; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CAPTURE
COMPARATIVE EVALUATIONS
CROSS SECTIONS
DEFORMED NUCLEI
ENERGY-LEVEL TRANSITIONS
GADOLINIUM ISOTOPES
GAMMA DETECTION
GAMMA SPECTRA
LANL
MULTIPLICITY
NEUTRON REACTIONS
NUCLEAR DEFORMATION
STABLE ISOTOPES
STRENGTH FUNCTIONS
TIME-OF-FLIGHT METHOD