The experimental large fluctuation in odd-even differences in moments of inertia of deformed actinide nuclei is investigated using the particle-number conserving (PNC) method for treating the cranked shell model with monopole and quadrupole pairing interactions. PNC calculations show that the large odd-even difference in moments of inertia mainly comes from the interference contributions j(μν) from particles in high j intruder orbitals μ and ν quite near the Fermi surface, which have no counterpart in the BCS formalism. The effective monopole and quadrupole pairing interaction strengths are determined to fit the experimental odd-even differences in binding energies and bandhead moments of inertia. The experimental results for the variation of moments of inertia with rotational frequency ω are reproduced well by the PNC calculation. The nearly identical experimental moments of inertia between 236U(gsb) and 238U(gsb) at low frequencies ℏω⩽0.20 MeV are also reproduced quite well.

The interaction potentials of the He-HF（DF,TF） van der Waals complexes have been obtained by center of mass transformation and then employing Murrell-Sorbie potential function to fit the accurate interaction energy data, which have been computed at symmetry-adapted perturbation theory （SAPT） level. The close coupling calculation of the partial cross sections for collision of He with HF（DF,TF） is performed by employing the fitted interaction potential. This calculation is performed for incident energies from 30 meV to 120 meV, and the information of the elastic, inelastic and total partial cross sections has been obtained. Further, the change tendency and character of the partial cross sections are discussed, and the ranges of effective interaction of the beginning of elastic and inelastic scattering have been determined for He-HF（DF,TF）collision system.