Mechanism of the reaction /sup 181/Ta(p, n)/sup 181/W at proton energies below 10 MeV
Journal Article
·
· Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
OSTI ID:6561338
The spectra and angular distributions of neutrons from the reaction /sup 181/Ta(p, n)/sup 181/W have been measured for proton energies from 5.76 to 9.83 MeV with a step approx.1 MeV. The neutron spectra were measured by the time-of-flight method in the EGP-10M charge-exchange accelerator for neutron-emission angles from 30 to 150/sup 0/ with a 30/sup 0/ step. It is shown that the angular distributions of the neutrons of the high-energy part of the spectra have an anisotropic nature, starting at a proton energy E/sub p/ = 7.80 MeV. This behavior of the angular distributions indicates that in the hard part of the spectrum there is a contribution of direct processes. Methods of experimental separation of the contribution of nonequilibrium processes in the integrated spectra are discussed. The level density obtained, after taking into account the contribution of nonequilibrium processes, agrees satisfactorily with the predictions of the back-shifted Fermi gas model.
- Research Organization:
- Physics and Power Engineering Institute, Obninsk
- OSTI ID:
- 6561338
- Journal Information:
- Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 31:5; ISSN SJNCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
651725* -- Nuclear Properties & Reactions
A=90-149
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
ANISOTROPY
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
ENERGY RANGE
ENERGY SPECTRA
EVEN-ODD NUCLEI
FERMI GAS MODEL
HADRON REACTIONS
HEAVY NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 01-10
NEUTRON SPECTRA
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PROTON REACTIONS
RADIOISOTOPES
SPECTRA
TANTALUM 181 TARGET
TARGETS
TUNGSTEN 181
TUNGSTEN ISOTOPES
A=90-149
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
ANISOTROPY
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
ENERGY RANGE
ENERGY SPECTRA
EVEN-ODD NUCLEI
FERMI GAS MODEL
HADRON REACTIONS
HEAVY NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 01-10
NEUTRON SPECTRA
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PROTON REACTIONS
RADIOISOTOPES
SPECTRA
TANTALUM 181 TARGET
TARGETS
TUNGSTEN 181
TUNGSTEN ISOTOPES