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N. Shinohara, K. Tsukada, S. Ichikawa, M. Magara, Y. Hatsukawa

Isomeric yield ratios of ¹³⁴I and ¹³⁶I in the proton-, ¹²C- and ¹⁹F-induced fission of ²³⁵U, ²³⁷Np and ²³⁸U

Short-lived nuclides of iodine produced in the proton-, ¹²C- and ¹⁹F-induced fission of ²³⁵U, ²³⁷Np and ²³⁸U were separated with a rapid chemical separation system SISAK. Relative yields of the nuclides were determined by γ -ray spectrometry to obtain the isomeric yield ratios of ^134mI/^134gI and ^136mI/^136gI. Angular momenta of the fission fragments, ¹³⁴I and ¹³⁶I, were derived from the measured isomeric yield ratios by the spin-dependent statistical model. In the light- and heavy-ion fission, variation of the observed angular momenta can be explained by the excitation energies of the fissioning nuclei and the spherical shell structure with N = 82.

Radiochimica Acta, Oldenbourg Wissenschaftsverlag

Print ISSN: 0033-8230
Volume: 88, 01/2000
Pages: 001

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