Evidence for the Scissors Mode in {sup 160}Tb from the Two-Step Gamma Cascades Measurement

Journal Article · Fri Oct 28 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3628416· OSTI ID:21612089

Kroll, J; Becvar, F; Krticka, M ^[1]; Tomandl, I ^[2]

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1. Faculty of Mathematics and Physics, Charles University, V Holesovickach 2, 182 00 Prague (Czech Republic)
2. Nuclear Physics Institute of the Czech Academy of Science, 250 68 Rez (Czech Republic)

Spectra of two-step {gamma} cascades (TSCs) following the neutron capture in {sup 159}Tb were measured by the sum-coincidence technique with a two-HPGe-detector facility [1] installed at a pure sub-thermal neutron beam of the 15 MW light-water research reactor at Rez near Prague. In order to obtain information about the quantities governing the {gamma} decay of {sup 160}Tb levels--the photon strength functions (PSFs) and the level density (LD)--experimental TSC spectra were compared with the output of simulations of the {gamma} cascade decay based on the validity of extreme statistical model. These simulations were performed with the aid of the DICEBOX algorithm [2] assuming various combinations of the PSFs and LD. The results obtained lead to an inescapable conclusion that the Scissors Mode (SM) plays a crucial role in the cascade {gamma} decay of the product nucleus {sup 160}Tb. This finding represents the first evidence for the existence of the SM in an odd-odd nucleus.

• OSTI ID: 21612089
• Journal Information: AIP Conference Proceedings, Vol. 1377, Issue 1; Conference: FINUSTAR 3 Conference on frontiers in nuclear structure, astrophysics, and reactions, Rhodes (Greece), 23-27 Aug 2010; Other Information: DOI: 10.1063/1.3628416; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALGORITHMS
CAPTURE
COMPUTERIZED SIMULATION
D CODES
ENERGY-LEVEL DENSITY
GAMMA CASCADES
GAMMA DECAY
HIGH-PURITY GE DETECTORS
NEUTRON REACTIONS
RESONANCE NEUTRONS
STATISTICAL MODELS
STRENGTH FUNCTIONS
TERBIUM 159
TERBIUM 160
THERMAL NEUTRONS
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COMPUTER CODES
DAYS LIVING RADIOISOTOPES
DECAY
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
FERMIONS
FUNCTIONS
GE SEMICONDUCTOR DETECTORS
HADRON REACTIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
NEUTRONS
NUCLEAR CASCADES
NUCLEAR DECAY
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
RADIATION DETECTORS
RADIOISOTOPES
RARE EARTH NUCLEI
SEMICONDUCTOR DETECTORS
SIMULATION
STABLE ISOTOPES
TERBIUM ISOTOPES