Revised prompt neutron emission multiplicity distributions for 236,238Pu

The prompt neutron emission multiplicity distributions and average values (Pν and <ν>, respectively) for nuclei which decay via spontaneous fission have been reevaluated. In the cases of 236Pu and 238Pu, inconsistencies were found in the recommended values for Pν and <ν> that were given in the most recent compilation of neutron emission multiplicity distributions from the fission of uranium and transuranium nuclides. In correcting for these inconsistencies, the values of <ν> for 236Pu and 238Pu have now been revised to 2.07+/-0.13 and 2.19+/-0.07, respectively. The corresponding neutron emission probabilities for these two nuclei have also been revised in order to take into account the new recommended <ν> values