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Gamma-ray spectra from capture of 2-eV to 3-keV neutrons by /sup 181/Ta

Journal Article · · Phys. Rev., C; (United States)
;
The spectra of ..gamma.. rays from the capture of neutrons by /sup 181/Ta were measured at the Livermore 100-MeV linac for neutrons from 2 eV to 3 keV with a Ge(Li) -NaI three-crystal spectrometer. Neutron resonances were resolved to 200-eV neutron energy. Individual primary ..gamma..-ray transitions to final states in /sup 182/Ta were resolved to 1778-keV excitation energy. These transitions were used to place 110 states with spin and parity assignments in the /sup 182/Ta level diagram. A set of 1240 E1 transition strengths was extracted from 19 neutron resonances of known spin and parity. The most likely chi/sup 2/ fit to the distribution of these widths yielded 1.38 +- 0.11 degrees of freedom. The E1 transition strengths were also examined for correlations with the reduced neutron widths of the initial and final states. The E1 strength function was extracted for E/sub ..gamma../to 6.1 MeV and compared with previous results.
Research Organization:
Lawrence Livermore Laboratory, University of California, Livermore, California 94550
OSTI ID:
7288610
Journal Information:
Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 16:2; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651823* -- Nuclear Properties & Reactions
A=150-189
Experimental-- Energy Levels & Transitions-- (-1987)
651825 -- Nuclear Properties & Reactions
A=150-189
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CAPTURE
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
GAMMA SPECTRA
GAMMA SPECTROMETERS
HADRON REACTIONS
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KEV RANGE
KEV RANGE 01-10
MEASURING INSTRUMENTS
MINUTES LIVING RADIOISOTOPES
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-ODD NUCLEI
PARITY
PARTICLE PROPERTIES
RADIOISOTOPES
SPECTRA
SPECTROMETERS
SPIN
TANTALUM 181 TARGET
TANTALUM 182
TANTALUM ISOTOPES
TARGETS