Published November 2014 | Version v1
Journal article Metadata-only

β decay of 72Co and microsecond isomers in even-mass neutron-rich nickel isotopes

Creators

  • 1. Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996 (United States)
  • 2. UNIRIB, Oak Ridge Associated Universities, Oak Ridge, TN 37831 (United States)
  • 3. National Superconducting Cyclotron Laboratory, East Lansing, MI 48824 (United States)
  • 4. Department of Physics and Astronomy, Mississippi State University, MS 39762 (United States)
  • 5. Faculty of Physics, University of Warsaw, Warszawa, PL 00-681 (Poland)
  • 6. Institute of Nuclear Physics, Polish Academy of Sciences, Kraków, PL 31-342 (Poland)
  • 7. Department of Chemistry, Michigan State University, East Lansing, MI 48824 (United States)
  • 8. Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States)

Description

A new excited state at 2164 keV has been identified in 72Ni with tentative spin and parity of 4+ based on comparison to shell model calculations. This level is suggested to be populated via the β-decay of an isomeric state in 72Co, and is postulated to be one of the key states that play a role in the disappearance of isomers in 72,74Ni. The known low-energy levels in 72Ni are compared with results of shell model calculations using the NR78 interaction to follow the seniority of the observed states. In addition, the half-life of the 8+ isomer in 76Ni has been measured as 630(90) ns and the full cascade of transitions from this isomer has been verified experimentally in this work. (paper)

Availability note (English)

Available from http://dx.doi.org/10.1088/0954-3899/41/11/115104

Additional details

Identifiers

DOI
10.1088/0954-3899/41/11/115104;

Publishing Information

Journal Title
Journal of Physics. G, Nuclear and Particle Physics
Journal Volume
41
Journal Issue
11
Journal Page Range
[9 p.]
ISSN
0954-3899
CODEN
JPGPED

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
46035972
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
COBALT 72; EXCITED STATES; HALF-LIFE; ISOMERIC NUCLEI; KEV RANGE; NEUTRON-RICH ISOTOPES; NICKEL 72; NICKEL 74; PARITY; SHELL MODELS; SPIN
Descriptors DEC
ANGULAR MOMENTUM; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; COBALT ISOTOPES; ENERGY LEVELS; ENERGY RANGE; EVEN-EVEN NUCLEI; INTERMEDIATE MASS NUCLEI; ISOTOPES; MATHEMATICAL MODELS; MILLISECONDS LIVING RADIOISOTOPES; NICKEL ISOTOPES; NUCLEAR MODELS; NUCLEI; ODD-ODD NUCLEI; PARTICLE PROPERTIES; RADIOISOTOPES; SECONDS LIVING RADIOISOTOPES