Title: Nuclear charge distribution in fission: Fractional independent yield of 140La from thermal-neutron induced fission of 249Cf
Abstract: The fractional independent yield of 140La from the thermal-neutron induced fission of 249Cf has been measured by two methods. In one method, the change in activity as a function of time of the 1596·2-keV gamma ray from 140La was measured with a Ge(Li) detector in the presence of the gross fission products. In the other method, 140La was chemically separated from 140Ba at known times after fission and its gamma activity was measured. The weighted mean of the yields from the two methods was 0·035±0·001. This yield is consistent with other yields from 249Cf and 252Cf fission which show there may be less redistribution of charge during fission of 249Cf and 252Cf than during fission of 233U and 235U. The most probable charge, Zp, for A = 134, 136, 138, and 140 appears to be 0·3 to 0·4 charge units closer to unchanged charge distribution for fission of 249Cf and 252Cf than for fission of 233U and 235U.
Publication Year: 1972
Publication Date: 1972-03-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 11
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