Home / Store / Journals / Electronic Articles / Nuclear Science and Engineering / Volume 73 / Number 2
J. T. Caldwell, E. J. Dowdy, R. A. Alvarez, B. L. Berman, P. Meyer
Nuclear Science and Engineering
Volume 73 / Number 2 / February 1980 / Pages 153-163
Format:electronic copy (download)
The prompt neutron multiplicities for photofission of the four isotopes 235U, 236U, 238U, and 232Th have been measured with monoenergetic photons over the energy range from 5.5 to 18 MeV using the annihilation in flight of fast positrons. The delayed neutron yield has been measured for all four isotopes at 10.9- and 16.8-MeV photon energies. The ratio of first- to second-chance fission has been measured as a function of energy up to 17-MeV excitation energy for 236U and 238U photofission.
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