Absolute cross sections and isomeric cross-section ratios for the ¹⁴⁸Nd(d,2n), ¹⁴⁸Nd(p,n), and ¹⁴⁶Nd(α,pn) reactions producing the isomeric pair ¹⁴⁸Pm^m,g

Excitation functions and isomeric cross-section ratios were determined for the ¹⁴⁸Nd(d,2n), ¹⁴⁸Nd(p,n), and ¹⁴⁶Nd(α,pn) reactions producing the isomeric pair ¹⁴⁸Pm^m,g. The experimental isomer ratios of 41.3-day ¹⁴⁸Pm^m (6-) and 5.37-day ¹⁴⁸Pm^g (1-) were compared with statistical model calculations wherein spin cutoff parameters μ were obtained assuming that σ is either independent or varying with excitation energy. The spin cutoff parameters and the effective moments of inertia deduced from these calculations were σ=4.2 and θ=0.70θ_r, respectively, for the reaction ¹⁴⁸Nd(p,n) ¹⁴⁸Pm^m,g, and σ=3.9 and θ=0.65θ_r, respectively, for the reaction ¹⁴⁸Nd(d,2n) ¹⁴⁸Pm^m,g.

[NUCLEAR REACTIONS ¹⁴⁸Nd(p,n), (d,2n), ¹⁴⁶Nd(α,pn), E_P=9-45 MeV, E_d=6.5-52 MeV, E_α=29-59 MeV; measured σ(E), isomer ratio; deduced spin cutoff parameter, moment of inertia.]