The influence of the π- and ρ-exchange potential on magnetic properties of nuclei
Abstract
A generalized particle-hole interaction is suggested which includes in addition to the zero-range terms of the Landau-Migdal theory also explicitly the contributions of the one-pion- and one-rho-exchange potential. Using this force, magnetic resonances in 208Pb and magnetic moments and transition probabilities in the neighbouring odd-mass nuclei are calculated. We include in the analysis also excitation energies and transition probabilities of unnatural parity states in 16O and 12C. From the comparison of the theoretical values with the experimental data, the Migdal parameters g0 and g' 0 are deduced. The large value of g' 0 = 0.76 (m∗/m = 1) indicates that not only pion condensation but also "so-called" precritical phenomena do not exist in nuclei. Due to our (nevertheless) relatively weak spin-dependent force the theoretical interpretation of magnetic moments and transition probabilities has to be modified.
- Publication:
-
Nuclear Physics A
- Pub Date:
- July 1980
- DOI:
- 10.1016/0375-9474(80)90660-0
- Bibcode:
- 1980NuPhA.343..382S