Elsevier

Nuclear Physics A

Volume 457, Issues 3–4, 15–22 September 1986, Pages 491-517
Nuclear Physics A

Microscopic calculation of antiproton atomic-like bound states in light nuclei

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Abstract

The antiproton-nucleon K-matrices corresponding to the central, spin-orbit and tensor parts of the Dover-Richard interaction are parametrized by linear combinations of Yukawa functions. The antiproton-nucleus optical potential is then constructed from the two-body K-matrix or a series of light nuclei. Basically simple folding with harmonic oscillator nucleon wave functions is used. However, the angular momentum couplings are treated with special care to allow for the inclusion of the spin-orbit and tensor parts of the basic interaction. Energy level shifts in antiprotonic atoms are then calculated for 4He, 6Li, 7Li, 12C, 16O, 17O, and 18O. The numerical results show that both the spin-orbit and tensor parts contribute terms significantly larger than the present experimental uncertainties. Hyperfine and fine splitting are of the same order of magnitude and analyses of experimental data should include such splittings. Considering the crudeness of the calculations the results are in surprisingly good agreement with experimental data.

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