Electric Quadrupole Moments and Strong Interaction Effects in Pionic Atoms of exp 165 Ho, exp 175 Lu, exp 176 Lu, exp 179 Hf and exp 181 Ta

摘要

The effective quadrupole moments Q sub(eff) of the nuclei of exp 165 Ho, exp 175 Lu, exp 176 Lu, exp 179 Hf and exp 181 Ta were accurately measured by detecting the pionic atom 5g-4f x-rays of the elements. The spectroscopic quadrupole moments, Q sub(spec), were obtained by correcting Q sub(eff) for nuclear finite size effect, distortion of the pion wave function by the pion-nucleus strong interaction, and contribution to the energy level splittings by the strong interaction. The intrinsic quadrupole moments, Q sub 0 , were obtained by projecting Q sub(spec) into the frame of reference fixed on the nucleus. The shift, epsilon sub 0 , and broadening, GAMMA sub 0 , of the 4f energy level due to the strong interactions between the pion and the nucleons for all the elements were also measured. Theoretical values of epsilon sub 0 and GAMMA sub 0 were calculated and compared to the experimental values. The measured values of Q sub 0 were compared with the existing results in muonic and pionic atoms. The measured values of epsilon sub 0 and GAMMA sub 0 were also compared with existing values. (Atomindex citation 13:679207)