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Title: Sub-nanosecond Half-life Measurement of the Yrast I{sup π}=5{sup −} State in the N=78 Nucleus {sup 136}{sub 58}Ce using Fast-timing Coincident Gamma-ray Spectroscopy

We report on the measurement of the half-life of the yrast I{sup π}=5{sup −} state in the transitional nucleus {sup 136}Ce using a combined HPGe-LaBr3(Ce) scintillator gamma-ray detection array. The measured value for the E1 decay is approximately half a nanosecond, which corresponds to an E1 decay strength of approximately 2×10{sup −6} Wu. This value is in line with single-particle type E1 decays in this mass region and suggests no sign of additional K-hindrance associated with axially symmetric quadrupole deformations observed for lighter cerium isotopes.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ; ; ;  [1] ; ; ; ; ; ;  [4] ;  [5] ; ; ;  [4] ;  [1] ;  [6] more »; ;  [4] ; « less
  1. Department of Physics, University of Surrey, Guildford, GU2 7XH (United Kingdom)
  2. (Saudi Arabia)
  3. (United Kingdom)
  4. Horia Hulubei – National Institute for Physics and Nuclear Engineering (IFIN-HH), Bucharest (Romania)
  5. School of Engineering, University of the West of Scotland, High Street, Paisley PA1 2BE (United Kingdom)
  6. School of Computing Engineering and Mathematics, University of Brighton, Brighton, BN2 4GJ (United Kingdom)
Publication Date:
OSTI Identifier:
22436685
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nuclear Data Sheets; Journal Volume: 120; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; AXIAL SYMMETRY; CERIUM 136; GAMMA DETECTION; GAMMA SPECTROSCOPY; HALF-LIFE; HIGH-PURITY GE DETECTORS; LANTHANUM BROMIDES; NUCLEAR DECAY; SCINTILLATION COUNTERS