X iv : n uc l - ex / 9 90 40 05 v 2 1 1 Ju n 19 99 ANL - 1999 Fission Hindrance in hot 216 Th : Evaporation Residue Measurements

نویسندگان

  • B. B. Back
  • D. J. Blumenthal
  • C. N. Davids
  • D. J. Henderson
  • R. Hermann
  • D. J. Hofman
  • C. L. Jiang
  • H. T. Penttilä
  • A. H. Wuosmaa
چکیده

The fusion evaporation-residue cross sections for 32 S+ 184 W have been mea-246, and 257 MeV using the ATLAS Fragment Mass Analyzer. The data are compared with Statistical Model calculations and it is found that a nuclear dissipation strength, which increases with the excitation energy is required to reproduce the excitation function. A comparison with previously published data shows that the dissipation strength depends strongly on the shell structure of the nuclear system.

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منابع مشابه

ar X iv : n uc l - ex / 9 90 40 05 v 1 8 A pr 1 99 9 ANL - 1999 Fission Hindrance in hot 216 Th : Evaporation Residue Measurements

The fusion evaporation-residue cross sections for 32 S+ 184 W has been mea-246, and 257 MeV using the ATLAS Fragment Mass Analyzer. The data are compared with Statistical Model calculations and it is found that a nuclear dissipation strength, which increases with the excitation energy is required to reproduce the excitation function. A comparison with previously published data show that the dis...

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ar X iv : n uc l - th / 9 90 10 16 v 1 8 J an 1 99 9 Experimental and Theoretical Search for a Phase Transition in Nuclear Fragmentation

Phase transitions of small isolated systems are signaled by the shape of the caloric equation of state e∗(T ), the relationship between the excitation energy per nucleon e∗ and temperature. In this work we compare the experimentally deduced e∗(T ) to the theoretical predictions. The experimentally accessible temperature was extracted from evaporation spectra from incomplete fusion reactions lea...

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تاریخ انتشار 2008