Energy spectra of delayed neutrons from separated fission products: (III). The precursors 88Br, 90Br, 138I, 140I, 142(Xe+Cs) and 144Cs |
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Authors: | S Shalev G Rudstam |
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Institution: | The Swedish Research Councils'' Laboratory, Studsvik, Fack, S-611 01 Nyköping, Sweden |
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Abstract: | Energy spectra of delayed neutrons from the mass-separated fission products 88. 90Br, 138, 14I, 142(Xe+Cs) and 144Cs have been measured. Average level spacings, neutron envelopes and Pn values were calculated and compared with the experimental data. The neutron envelopes are well reproduced for all precursors except 90Br and 140I. For the latter the neutron window predicted by various mass formulae is too wide and a considerable reduction was found necessary to bring calculated envelopes in agreement with the experimental distributions. |
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Keywords: | Radioactivity |
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