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Properties of N=84, even-even nuclei populated in the spontaneous fission of 248Cm |
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| Authors: | A Korgul W Urban T Rząca-Urban M Rejmund JL Durell MJ Leddy MA Jones WR Phillips AG Smith BJ Varley N Schulz M Bentaleb E Lubkiewicz I Ahmad LR Morss |
| Institution: | (1) Institute of Experimental Physics, Warsaw University, ul.Hoża 69, 00-681 Warszawa, Poland, PL;(2) Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, bat. 104, 91405 Orsay Campus, France, FR;(3) Schuster Laboratory, Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK, GB;(4) Institut de Recherches Subatomiques, CNRS-IN2P3 et Universite Louis Pasteur, 67037 Strasbourg, France, FR;(5) Argonne National Laboratory, Argonne, IL 60439, USA, US |
| Abstract: | Excited states in the neutron-rich, N=84 nuclei 134Sn, 136Te and 138Xe, populated in the spontaneous fission of 248Cm, were studied to medium spins using the EUROGAM2 array. OXBASH code calculations support the experimental identification of maximum aligned configurations in these isotopes. Empirical shell model calculations agree with the proposed excitation energy of the neutron h9/2 excitation in the 132Sn region. A discrepancy between the observed and calculated excitation energy of the Iπ= 12+ level in 136Te indicates possible admixtures of collective excitations in this nucleus. Clear signs of collective excitations are observed in 138Xe. Received: 10 November 1999 / Revised version: 22 December 1999 |
| Keywords: | PACS: 21 60 Cs Shell model – 23 20 Lv Gamma transitions and level energies – 27 80 +w 190 ≤ A ≤ 219 – 25 70 -z Low and intermediate energy heavy-ion reactions |
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