Cumulative and independent yields of krypton and xenon isotopes from reactor neutron induced fission of 232Th |
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| Affiliation: | 1. Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116, Braunschweig, Germany;2. Laboratory of Radiochemistry, Paul Scherrer Institut, Forschungsstrasse 111, 5232, Villigen, PSI, Switzerland;3. Institut für Physik, Johannes Gutenberg Universität Mainz, Staudingerweg 7, D-55128, Mainz, Germany;1. Amity Institute of Geoinformatics & Remote Sensing (AIGIRS), Amity University, Sector 125, Noida, 201313, Gautam Buddha Nagar, Uttar Pradesh, India;2. Department of Soil Science & Agriculture Chemistry, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, 221005, Uttar Pradesh, India;3. Department of Geology, University of Delhi, Chhatra Marg, Delhi, 110007, India;1. Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India;2. Department of Physics, Kyungpook National University, Daegu, 41566, South Korea |
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| Abstract: | The fractional cumulative and independent yields of 139Xe, 140Xe, 90Kr and 91Kr from the fission of 232Th induced by reactor neutrons were measured. The fission produced gases xenon and krypton were separated from the other elements by fast sweeping with a stream of helium. The γ-ray spectra of the noble gases and their daughters were followed and from these γ-ray activities and the known absolute γ-ray abundances, the corresponding yields were calculated. The procedure was verified by remeasuring the yields of the noble gases from the thermal fission of 235U and an excellent fit with the published values was obtained.The fractional independent yields of the cesium and rubidium isotopes were derived from the measured yields of the corresponding isobaric members, krypton and xenon. The comparison of the measured yields with the “normal” yields reveals an enhancement or diminishing of products with an even or odd number, respectively, of ∼30%. |
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