Determination of shell correction energies at saddle point using pre-scission neutron multiplicities

作者：Golda K S^*; Saxena A; Mittal V K; Mahata K; Sugathan P; Jhingan A; Singh V; Sandal R; Goyal S; Gehlot J; Dhal A; Behera B R; Bhowmik R K; Kailas S

来源：Nuclear Physics A, 2013, 913: 157-169.

DOI：10.1016/j.nuclphysa.2013.05.016

• NUCLEAR REACTIONS Pt-194,Pt- 198(C-12. f), E*=49.3, 54.3, 59.4, 62.2 MeV
• measured fission fragments, E-n, I-n(theta) using ToF
• deduced neutron multiplicity vs E-n and theta, pre-scission neutron multiplicity vs E*, fusion-fission sigma
• calculated fission barrier, shell effects, statistical model parameters, pre-scission neutron multiplicity vs E*, fusion-fission sigma, fission sigma vs E*, evaporation residue sigma vs E*. Compared w

Pre-scission neutron multiplicities have been measured for C-12 + Pt-194,Pt- 198 systems at matching excitation energies at near Coulomb barrier region. Statistical model analysis with a modified fission barrier and level density prescription have been carried out to fit the measured pre-scission neutron multiplicities and the available evaporation residue and fission cross sections simultaneously to constrain statistical model parameters. Simultaneous fitting of the pre-scission neutron multiplicities and cross section data requires shell correction at the saddle point.

• 出版日期2013-9-2