Abstract
The independent isomeric yield ratio of $^{134}\mathrm{I}$ has been determined radiochemically for the photofission of $^{235}\mathrm{U}$ and $^{238}\mathrm{U}$ with bremsstrahlung with end-point energies ranging from 12 to 30 MeV. The root-mean-square values of the angular momentum of the corresponding fission fragments, ${J}_{\mathrm{rms}}$, calculated using a statistical deexcitation model show an independence on the compound nucleus angular momentum and excitation energy. This ${J}_{\mathrm{rms}}$ behavior is compared to the results obtained in thermal neutron induced and medium-energy particle induced fission.NUCLEAR REACTIONS, FISSION $^{235,238}\mathrm{U}$($\ensuremath{\gamma}$,$F$), ${E}_{\ensuremath{\gamma}}max=12, 15, 20, 30$ MeV; measured $^{134}\mathrm{I}$ independent isomeric yields; deduced angular momenta.
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