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Investigation into the semimagic nature of the tin isotopes through electromagnetic moments

Journal Article · · Physical Review C, Nuclear Physics
 [1];  [2];  [3];  [4];  [1];  [5];  [3];  [6];  [1];  [6];  [1];  [7];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Australian National Univ., Canberra, ACT (Australia)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  4. Instituto de Ciencias Nucleares (Mexico)
  5. Oak Ridge Associated Univ., Oak Ridge, TN (United States)
  6. Rutgers Univ., New Brunswick, NJ (United States)
  7. Univ. of Tennessee, Knoxville, TN (United States); Oxford Univ., Oxford (United Kingdom)
A complete set of electromagnetic moments, B(E2;0+1 2+1), Q(2+1), and g(2+1), have been measured from Coulomb excitation of semi-magic 112,114,116,118,120,122,124Sn (Z = 50) on natural carbon and titanium targets. The magnitude of the B(E2) values, measured to a precision of ~4%, disagree with a recent lifetime study [Phys. Lett. B 695, 110 (2011)] that employed the Doppler- shift attenuation method. The B(E2) values show an overall enhancement compared with recent theoretical calculations and a clear asymmetry about midshell, contrary to naive expectations. A new static electric quadrupole moment, Q(2+1), has been measured for 114Sn. The static quadrupole moments are generally consistent with zero but reveal an enhancement near midshell; this had not been previously observed. The magnetic dipole moments are consistent with previous measurements and show a near monotonic decrease in value with neutron number. The current theory calculations fail to reproduce the electromagnetic moments of the tin isotopes. The role of 2p-2h and 4p-4h intruders, which are lowest in energy at mid shell and outside of current model spaces, needs to be investigated in the future.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725; AC05-76OR00033; FG02-96ER40963; FG52-08NA28552
OSTI ID:
1223667
Alternate ID(s):
OSTI ID: 1223832
Journal Information:
Physical Review C, Nuclear Physics, Journal Name: Physical Review C, Nuclear Physics Journal Issue: 4 Vol. 92; ISSN 0556-2813; ISSN PRVCAN
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Shell-model study of quadrupole collectivity in light tin isotopes journal April 2015
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Cited By (8)

Measurement of the 2 1 + level lifetime in Sn 120 by the Doppler shift attenuation method: Evidence of enhanced collectivity journal September 2019
Z = 50 core stability in Sn 110 from magnetic-moment and lifetime measurements journal April 2016
First-excited state g factor of Te 136 by the recoil in vacuum method journal July 2017
No evidence of reduced collectivity in Coulomb-excited Sn isotopes journal November 2017
Shape coexistence and collective low-spin states in Sn 112 , 114 studied with the ( p , p ′ γ ) Doppler-shift attenuation coincidence technique journal May 2018
Electromagnetic Moments of Radioactive Te 136 and the Emergence of Collectivity 2 p ⊕ 2 n Outside of Double-Magic Sn 132 journal March 2017
Structure of the Lightest Tin Isotopes journal April 2018
Early Signal of Emerging Nuclear Collectivity in Neutron-Rich Sb 129 journal January 2020

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