γ-ray multipolarimetry between low-spin states of 136Ce: Search for the 21,ms+ one-phonon mixed-symmetry state
Creators
- 1. Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany)
- 2. Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Koeln (Germany)
- 3. Department of Physics and Astronomy, State University of New York at Stony Brook, Stony Brook, New York 11794-3800 (United States)
- 4. Faculty of Physics, St. Kliment Ohridski University of Sofia, Sofia 1164 (Bulgaria)
Description
An experiment was performed on 136Ce to measure E2/M1 multipole mixing ratios using the method of γγ angular correlations. The low-spin states of interest were populated by β decay from the 2+ ground state of 136Pr that has a half-life of 13.1 min. Emitted γ rays were detected with the Stony Brook cube germanium detector array. Five E2/M1 multipole mixing ratios were measured for the first time and two spin and parity quantum numbers were assigned. Candidates for the 21,ms+ state of 136Ce were identified from large M1 fractions in the E2/M1 multipole mixing ratios. The 21,ms+ state is suggested to be fragmented between the closely lying 23+ and 24+ states. A two state mixing scenario is employed for deducing an F-spin mixing matrix element of 43(5) keV
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review. C, Nuclear Physics
- Journal Volume
- 75
- Journal Issue
- 1
- Journal Page Range
- p. 014313-014313.7
- ISSN
- 0556-2813
- CODEN
- PRVCAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39014341
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- ANGULAR CORRELATION; BETA DECAY; CERIUM 136; GAMMA RADIATION; GE SEMICONDUCTOR DETECTORS; GROUND STATES; HALF-LIFE; KEV RANGE 10-100; MATRIX ELEMENTS; MIXING; MIXING RATIO; PARITY; PHONONS; PRASEODYMIUM 136; QUANTUM NUMBERS; SPIN; SYMMETRY
- Descriptors DEC
- ANGULAR MOMENTUM; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; CERIUM ISOTOPES; CORRELATIONS; DECAY; DIMENSIONLESS NUMBERS; ELECTROMAGNETIC RADIATION; ELECTRON CAPTURE RADIOISOTOPES; ENERGY LEVELS; ENERGY RANGE; EVEN-EVEN NUCLEI; INTERMEDIATE MASS NUCLEI; IONIZING RADIATIONS; ISOTOPES; KEV RANGE; MEASURING INSTRUMENTS; MINUTES LIVING RADIOISOTOPES; NUCLEAR DECAY; NUCLEI; ODD-ODD NUCLEI; PARTICLE PROPERTIES; PRASEODYMIUM ISOTOPES; QUASI PARTICLES; RADIATION DETECTORS; RADIATIONS; RADIOISOTOPES; RARE EARTH NUCLEI; SEMICONDUCTOR DETECTORS; STABLE ISOTOPES
Optional Information
- Notes
- (c) 2007 The American Physical Society