Half-lives andP
n
values of delayed-neutron precursors in the mass chains 85–87, 92, 135, 136 and 145 |
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Authors: | J CranÇon C Ristori H Ohm W Rudolph K -L Kratz M Asghar |
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Institution: | 1. Département de Recherche Fondamentale, Laboratoire de Chimie Physique Nucléaire, Centre d'Etudes Nucléaires de Grenoble, Grenoble, France 2. Institut für Kernchemie der Universit?t Mainz, Mainz, Germany 4. Institut Laue-Langevin, Grenoble, France
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Abstract: | Further results are presented on half-lives and neutron emission probabilities (P n ) of short-lived delayed-neutron precursors in the mass chains 85–87, 92, 135, 136 and 145 obtained with the recoil focussing parabola-type mass separator for unslowed fission products LOHENGRIN installed at the Grenoble high-flux reactor. A newP n -value of (44±14)% is given for the (0.73±0.06)s87As; theP n -values of seven precursor nuclides have been redetermined: (1.9±0.1)s85As with (22±8)%, 0.9s86As with (10.5±2.2)%, (0.35±0.04)s92Br with (21±8)%, (1.6±0.15)s135Sb with (14±1)%, (0.9±0.1)s136Sb with (19±9)%, (17.5±0.2)s136Te with (2.0±1.0)% and 0.6s145Cs with (12.5±3.0)%. The results are compared with the existing data, and the neutron emission probabilities are discussed within a simple semi-empirical picture. |
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