TY - JOUR
T1 - Measurement of pre-fission neutrons from 200Pb; Further limits to the statistical fission parameters
AU - Ward, D.
AU - Charity, R. J.
AU - Hinde, D. J.
AU - Leigh, J. R.
AU - Newton, J. O.
PY - 1983/7/11
Y1 - 1983/7/11
N2 - The average number of pre-fission neutrons (νpre) emitted following fusion of 181Ta and 19F has been measured. The multiplicity is 2.1 ± 0.5, 2.7 ∓ 0.5 and 2.9 ∓ 0.5 at bombarding energies of 105, 115 and 125 MeV respectively. Thus, on average, fission occurs about half way down the neutron evaporation chain for 200Pb. Calculated values of νpre, from the statistical/rotating liquid drop model, are extremely sensitive to af an, the ratio of the level density parameters at the saddle point and equilibrium deformations. The results restrict the effective value of af an to 1.02 ± 0.02.
AB - The average number of pre-fission neutrons (νpre) emitted following fusion of 181Ta and 19F has been measured. The multiplicity is 2.1 ± 0.5, 2.7 ∓ 0.5 and 2.9 ∓ 0.5 at bombarding energies of 105, 115 and 125 MeV respectively. Thus, on average, fission occurs about half way down the neutron evaporation chain for 200Pb. Calculated values of νpre, from the statistical/rotating liquid drop model, are extremely sensitive to af an, the ratio of the level density parameters at the saddle point and equilibrium deformations. The results restrict the effective value of af an to 1.02 ± 0.02.
KW - Nuclear reactions
UR - https://www.scopus.com/pages/publications/0001381259
U2 - 10.1016/0375-9474(83)90196-3
DO - 10.1016/0375-9474(83)90196-3
M3 - Article
AN - SCOPUS:0001381259
SN - 0375-9474
VL - 403
SP - 189
EP - 204
JO - Nuclear Physics, Section A
JF - Nuclear Physics, Section A
IS - 1
ER -