Angular momentum of fission fragments in low energy fission of actinides

Abstract

Independent isomeric yield ratios (IYR) of ${}^{128}\mathrm{Sb}$, ${}^{130}\mathrm{Sb}$, ${}^{132}\mathrm{Sb}$, ${}^{131}\mathrm{Te}$, ${}^{133}\mathrm{Te}$, ${}^{132}\mathrm{I}$, ${}^{134}\mathrm{I}$, ${}^{136}\mathrm{I}$, ${}^{135}\mathrm{Xe}$, and ${}^{138}\mathrm{Cs}$ have been determined in fast neutron induced fission of ${}^{232}\mathrm{Th}$, ${}^{238}\mathrm{U}$, ${}^{240}\mathrm{Pu}$, and ${}^{244}\mathrm{Cm}$ as well as in thermal neutron induced fission of ${}^{232}\mathrm{U}$ and ${}^{238}\mathrm{Pu}$ using radiochemical and offline $\gamma$-ray spectrometric techniques. From the IYR, fragment angular momenta ($J_{\mathrm{rms}}$) have been deduced using a spin-dependent statistical model analysis. These data along with the literature data for ${{}^{230}\mathrm{Th}}^{\ast }$, ${{}^{234}\mathrm{U}}^{\ast }$, ${{}^{236}\mathrm{U}}^{\ast }$, ${{}^{240}\mathrm{Pu}}^{\ast }$, ${{}^{242}\mathrm{Pu}}^{\ast }$, ${}^{244}\mathrm{Cm}$(SF), ${{}^{246}\mathrm{Cm}}^{\ast }$, ${{}^{250}\mathrm{Cf}}^{\ast }$, and

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