Published April 2009 | Version v1
Journal article Metadata-only

Fast decay of a three-quasiparticle isomer in 171Tm

Creators

  • 1. Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom)
  • 2. Department of Nuclear Physics, RSPhysSE, Australian National University, Canberra ACT0200 (Australia)
  • 3. School of Environment and Technology, University of Brighton, Brighton BN2 4GJ (United Kingdom)
  • 4. Department of Physics, Australian National University, Canberra ACT0200 (Australia)

Description

Incomplete-fusion reactions have been used to study high-spin states in 171Tm. Gamma rays and conversion electrons were measured using pulsed-beam conditions for enhanced isomer sensitivity. A Kπ=19/2+, three-quasiparticle isomer was identified, with a half-life of 1.7(2)μs. The faster than expected transition rates from the isomer can be understood as being due to a chance near-degeneracy, with mixing between the isomeric state and the Iπ=19/2+ member of the one-quasiparticle rotational band to which it decays. The implied mixing matrix element is 12(2) eV.

Additional details

Identifiers

DOI
10.1103/PhysRevC.79.044321;

Publishing Information

Journal Title
Physical Review. C, Nuclear Physics
Journal Volume
79
Journal Issue
4
Journal Page Range
p. 044321-044321.5
ISSN
0556-2813
CODEN
PRVCAN

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
41035200
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Descriptors DEI
BEAMS; CONVERSION; DECAY; ELECTRONS; GAMMA RADIATION; HALF-LIFE; HIGH SPIN STATES; INCOMPLETE FUSION REACTIONS; ISOMERS; MATRIX ELEMENTS; MIXING; ROTATIONAL STATES; SENSITIVITY; THULIUM 171
Descriptors DEC
BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY LEVELS; EXCITED STATES; FERMIONS; HEAVY ION REACTIONS; INTERMEDIATE MASS NUCLEI; IONIZING RADIATIONS; ISOTOPES; LEPTONS; NUCLEAR REACTIONS; NUCLEI; ODD-EVEN NUCLEI; RADIATIONS; RADIOISOTOPES; RARE EARTH NUCLEI; THULIUM ISOTOPES; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
(c) 2009 The American Physical Society