Published 1976 | Version v1
Miscellaneous Metadata-only

Observation of rotational states before fission barrier for the 232Th(n,f) reaction

Creators

  • 1. CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France). Dept. de Physique Nucleaire

Description

The 232Th fission cross section has been measured relative to that of 235U up to 5 MeV, with a neutron energy resolution of 3 keV at 1.6 MeV. The angular anisotropy of fission fragments has also been measured in the same energy range with an energy resolution of 6 keV at 1.6 MeV. The broad vibrational levels located above 1 MeV are resolved into sharp structures which are interpreted as rotational states. The rotational constants h2/2J of highly deformed 233Th are found to be 2.45 and 2.65 keV at 1.5 and 1.6 MeV respectively. Our results are interpreted by the possibility of a third minimum in the fission barrier

Additional details

Additional titles

Original title (French)
Mise en evidence de bandes de rotation pres du seuil de fission dans la reaction

Publishing Information

Imprint Title
Neutron physics
Imprint Pagination
no. 5 p. 291-299.
Report number
INIS-mf--3896

Conference

Title
3. all-union conference on neutron physics.
Dates
9 - 13 Jun 1975.
Place
Kiev, Ukrainian SSR.

INIS

Country of Publication
USSR
Country of Input or Organization
USSR
INIS RN
9356715
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ANGULAR DISTRIBUTION; ANISOTROPY; COMPARATIVE EVALUATIONS; CROSS SECTIONS; FISSION BARRIER; FISSION FRAGMENTS; KEV RANGE; NEUTRON REACTIONS; ROTATIONAL STATES; THORIUM 232 TARGET; THORIUM 233; VIBRATIONAL STATES
Descriptors DEC
ACTINIDE NUCLEI; BARYON REACTIONS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; DISTRIBUTION; ENERGY; ENERGY LEVELS; ENERGY RANGE; EVEN-ODD NUCLEI; EXCITED STATES; HADRON REACTIONS; HEAVY NUCLEI; ISOTOPES; MINUTES LIVING RADIOISOTOPES; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; POTENTIAL ENERGY; RADIOISOTOPES; TARGETS; THORIUM ISOTOPES

Optional Information

Notes
7 refs.; 3 figs.; 1 table. Imprint:Nejtronnaya fizika.;Chast' 5.