Short note
Measurement of the lifetime of the first 2
state in 124Ba
K. Uchiyama1 - K. Furuno1 - T. Shizuma1 - M. Sugita2 - M. Kato1 - Y. Tokita1 - M. Murasaki1 - N. Hashimoto1 - H. Takahashi1 - T. Komatsubara1 - K. Matsuura1 - T. Tanaka1 - Y. Sasaki1
1 Institute of Physics and Tandem Accelerator Center, University of Tsukuba,
Ibaraki, 305-8577, Japan
2 Japan Atomic Energy Research Institute, Tokai, Ibaraki, 319-1106, Japan
Received: 23 February 1998 Communicated by B. Herskind
Abstract
The lifetime of the first 2+ state in the nucleus
124Ba has been measured by -
coincidence recoil-distance
Doppler shift method. The 109Ag(19F, 4n)124Ba reaction
at a beam energy of 75 MeV was employed to populate excited states
in 124Ba. The mean lifetime was determined to be 275(12) ps
using the differential decay curve method. The value of
for 124Ba deduced from the
lifetime is in reasonable agreement with the prediction of
the proton-neutron interacting boson model(IBM-2) without Pauli blocking
effect.
PACS
21.10.Tg Lifetimes -
23.20.-g Electromagnetic transitions -
27.60.+j
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