https://doi.org/10.1140/epjad/i2005-06-128-7
ENAM 2004
Coulomb excitation measurements of transition strengths in the isotopes 132, 134Sn
1
Physics Division, Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA
2
Joint Institute for Heavy Ion Research, Oak Ridge National Laboratory, Oak Ridge, 37831, TN, USA
3
Department of Physics and Astronomy, University of Tennessee, 37996, Knoxville, TN, USA
4
Instituto de Ciencias Nucleares, 04510, Mexico
Received:
17
January
2005
Accepted:
4
April
2005
Published online:
10
August
2005
We describe an experiment optimized to determine the transition probabilities for excitation of the first excited 2+ state in 132Sn. The large excitation energy (4.04MeV) and consequent small excitation cross-section, together with the modest beam intensity available makes this a challenging experiment. The preliminary result is B(E2;0+ → 2+) = 0.11±0.03e 2 b 2. The high efficiency and generalized nature of the setup enabled us to also measure the first 2+ state in the two-neutron nucleus 134Sn. We have determined a value of B(E2;0+ → 2+) = 0.029±0.005e 2 b 2 which shows no sign of the asymmetry with respect to the N = 82 shell closure exhibited by the Te isotopes.
PACS: 21.10.Re Collective levels – / 25.70.De Coulomb excitation – / 27.60.+j 90 ⩽ A ⩽ 149 –
© Società Italiana di Fisica and Springer-Verlag, 2005
