Neutron-induced fission of even- and odd-mass plutonium isotopes within a four-dimensional Langevin framework

Neutron multiplicity prior to scission and evaluation of mass distribution of fission fragments with the fission time scale for neutron induced fission of plutonium isotopes are investigated using a dynamical Langevin approach. Also, mass yield of fragments and prompt neutron multiplicity in different time scales of the fission process are compared with experimental data. Reasonable agreement is achieved between calculated and available experimental data.

Figure 1

Mass distribution of neutron-induced fission fragments of ${}^{238}\mathrm{Pu}$ with $E_n=0.0253$ eV. Experimental data [48] are indicated by open squares.

Figure 2

Mass distribution of neutron-induced fission fragments of ${}^{239}\mathrm{Pu}$ with $E_n=0.0253$ eV. Experimental data [49] are indicated by open squares.

Figure 3

Mass distribution of neutron-induced fission fragments of ${}^{240}\mathrm{Pu}$ with $E_n=1.9$ eV. Experimental data [50] are indicated by open squares.

Figure 4

Mass distribution of neutron-induced fission fragments of ${}^{241}\mathrm{Pu}$ with $E_n=0.0253$ eV. Experimental data [51] are indicated by open squares.

Figure 5

Mass distribution of neutron-induced fission fragments of ${}^{242}\mathrm{Pu}$ with $E_n=15.1$ MeV. Experimental data [52] are indicated by open squares.

Figure 6

Average prompt fission neutron multiplicity for ${}^{238}\mathrm{Pu}$ as a function of the incident neutron energy. Experimental data are denoted by the solid line.

Figure 7

Average prompt fission neutron multiplicity for ${}^{239}\mathrm{Pu}$ as a function of the incident neutron energy. Experimental data [53] are denoted by open squares.

Figure 8

Average prompt fission neutron multiplicity for ${}^{240}\mathrm{Pu}$ as a function of the incident neutron energy. Experimental data [54] are denoted by open squares.

Figure 9

Average prompt fission neutron multiplicity for ${}^{241}\mathrm{Pu}$ as a function of the incident neutron energy. Experimental data [55] are denoted by open squares.

Figure 10

Average prompt fission neutron multiplicity for ${}^{242}\mathrm{Pu}$ as a function of the incident neutron energy. Experimental data [54] are denoted by open squares.