Coincidence Doppler shift lifetime measurements in 73,74Se and 74Br using the EUROBALL cluster cube array
Creators
- 1. Goettingen Univ. (Germany). 2. Physikalisches Inst.
- 2. Universidad Nacional de Colombia, Bogota D.C. (Colombia)
- 3. Max-Planck-Institut fuer Kernphysik, 69029 Heidelberg (Germany)
Description
Subpicosecond lifetimes of high spin states in the rotational nuclei 73Se, 74Se and 74Br have been measured using the 58Ni+19F compound reaction and the Doppler shift attenuation method. Six EUROBALL cluster detectors arranged in cube geometry allowed us to select the relevant transitions in γγ coincidence mode. The high counting statistics achieved in this setup also facilitated the determination of average sidefeeding times, which were found to agree rather well with the results of Monte-Carlo calculations of the particle and γ-ray evaporation process. The deduced quadrupole strengths and deformations are compared with the results of previous measurements and the predictions of cranked shell model calculations. In 74Br, a large and constant prolate deformation of β2=0.37(1) was found for the presumed 4+ and 3- two-quasiparticle bands. (orig.)
Additional details
Publishing Information
- Journal Title
- European Physical Journal. A
- Journal Volume
- 6
- Journal Issue
- 3
- Journal Page Range
- p. 257-268
- ISSN
- 1434-6001
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 31000336
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BROMINE 74; DE-EXCITATION; E2-TRANSITIONS; EXPERIMENTAL DATA; FLUORINE 19 REACTIONS; GAMMA CASCADES; HEAVY ION FUSION REACTIONS; HIGH SPIN STATES; LIFETIME; MEV RANGE 10-100; NEUTRONS; NICKEL 58 TARGET; NUCLEAR DEFORMATION; NUCLEAR ELECTRIC MOMENTS; PROTONS; QUADRUPOLE MOMENTS; ROTATIONAL STATES; SELENIUM 73; SELENIUM 74; STRENGTH FUNCTIONS
- Descriptors DEC
- BARYONS; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; BROMINE ISOTOPES; CATIONS; CHARGED PARTICLES; DATA; DEFORMATION; ELECTRIC MOMENTS; ELECTRON CAPTURE RADIOISOTOPES; ELEMENTARY PARTICLES; ENERGY LEVELS; ENERGY RANGE; ENERGY-LEVEL TRANSITIONS; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; EXCITED STATES; FERMIONS; FUNCTIONS; HADRONS; HEAVY ION REACTIONS; HOURS LIVING RADIOISOTOPES; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; INFORMATION; INTERMEDIATE MASS NUCLEI; IONS; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MEV RANGE; MINUTES LIVING RADIOISOTOPES; MULTIPOLE TRANSITIONS; NUCLEAR CASCADES; NUCLEAR PROPERTIES; NUCLEAR REACTIONS; NUCLEI; NUCLEONS; NUCLEOSYNTHESIS; NUMERICAL DATA; ODD-ODD NUCLEI; RADIOISOTOPES; SELENIUM ISOTOPES; STABLE ISOTOPES; SYNTHESIS; TARGETS
Optional Information
- Notes
- With 9 figs., 4 tabs., 33 refs.