skip to main content


This content will become publicly available on July 27, 2018

Title: First-excited state g factor of Te 136 by the recoil in vacuum method

The g factor of the first 2 + state of radioactive 136Te with two valence protons and two valence neutrons beyond double-magic 132Sn has been measured by the recoil in vacuum (RIV) method. The lifetime of this state is an order of magnitude longer than the lifetimes of excited states recently measured by the RIV method in Sn and Te isotopes, requiring a new evaluation of the free-ion hyperfine interactions and methodology used to determine the g factor. In this paper, the calibration data are reported and the analysis procedures are described in detail. The resultant g factor has a similar magnitude to the g factors of other nuclei with an equal number of valence protons and neutrons in the major shell. However, an unexpected trend is found in the g factors of the N = 84 isotones, which decrease from 136Te to 144Nd. Finally, shell model calculations with interactions derived from the CD Bonn potential show good agreement with the g factors and E2 transition rates of 2 + states around 132Sn, confirming earlier indications that 132Sn is a good doubly magic core.
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [4] ;  [2] ;  [5] ;  [2]
  1. Australian National Univ., Canberra, ACT (Australia)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. St. Kliment Ohridski Univ. of Sofia (Bulgaria); Univ. of Tennessee, Knoxville, TN (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  5. Univ. of Tennessee, Knoxville, TN (United States); Univ. of Oxford (United Kingdom)
Publication Date:
Grant/Contract Number:
AC05-00OR22725; FG02-96ER40963; DP0773273
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 96; Journal Issue: 1; Journal ID: ISSN 2469-9985
American Physical Society (APS)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); Australian Research Council (ARC) (Australia)
Country of Publication:
United States
74 ATOMIC AND MOLECULAR PHYSICS; electromagnetic transitions; low & intermediate energy heavy-ion reactions; nuclear structure & decays; spectroscopic factors & electromagnetic moments; unstable nuclei induced nuclear reactions
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1373133