Importance of E2 transitions in 175Lu(n, γ) isomer production calculations

The 175Lu(n,γ)176m,gLu reaction produces 176Lu both in the ground state(g.s.)(7-, t1/2 = 3.6 x 1010 y) and in an isomeric state at 0.123 MeV(1-, t1/2=3.7 h). In the calculation of the isomer production for the 175Lu(n,γ)176m,gLu reaction the authors have found that the inclusion of E2 transitions from 62 band-head members of 176Lu (a possible s-process chronometer and/or thermometer) led to an m/total value of 0.82 at En = 30 keV, compared to the 0.62 m/total value obtained previously when no E2 transitions from the band heads were considered. All recent cross-section calculations were made with STAPLUS, the modification of the STAPRE code. They used the same neutron optical model potential and the same discrete levels and level density parameterizations for 175Lu and 176Lu as in their earlier work