## Abstract

Fission fragment angular distributions have been measured for ^{10}B(spin=3^{+}), ^{11}B(spin=3/2^{-})+^{232}Th reactions at projectile energies below and above the Coulomb barrier. The fragment anisotropies for the ^{11}B +^{232}Th system are found to be significantly larger than the statistical saddle point model (SSPM) predictions at sub-barrier energies, while for the ^{10}B+^{232}Th system the deviations from SSPM predictions are found to be much less. The present results indicate that the ground state spin of the projectile influences the fragment anisotropies at sub-barrier energies in a larger way than predicted by the statistical model with the inclusion of the M-state distributions. Calculations were carried out based on the entrance channel dependent Κ-states distribution and preequilibrium fission models, with inclusion of ground state spin of the projectiles, which are found to explain the variation of fission fragment anisotropies as a function of bombarding energy for both the systems.

Original language | English |
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Article number | 031601 |

Pages (from-to) | 316011-316015 |

Number of pages | 5 |

Journal | Physical Review C - Nuclear Physics |

Volume | 62 |

Issue number | 3 |

Publication status | Published - 2000 Sep |

## ASJC Scopus subject areas

- Nuclear and High Energy Physics