Particle-hole multiplets in 40Ca observed in the 41Ca(τ, α) reaction

Abstract Energy levels in 40 Ca up to 10.2 MeV have been studied in the neutron pickup reaction 41 Ca(τ, α) 40 Ca with 20 MeV bombarding energy. Thirty excited states have been identified and angular distributions have been measured in the interval from 5° to 40° by means of a split-pole magnetic spectrometer. The angular distributions together with DW calculations have been used to extract l n values and spectroscopic factors. The l n = 2 strength distribution for the f 7 2 d 3 2 −1 particle-hole levels is compared to the l p = 3 strength distribution from pr stripping data.