Elsevier

Nuclear Physics A

Volume 203, Issue 2, 19 March 1973, Pages 295-304
Nuclear Physics A

Second Coulomb energy differences of isospin triplets in the 2s-1d shell

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Abstract

Second Coulomb energy differences, which in the present case are proportional to the tensor Coulomb energy, are calculated for 0+, T = 1 ground states in the region 18 ≦ A ≦ 42 using a shell model that includes a pairing interaction. The calculation is done with a mathematical formalism that includes p-n pairs as well as p-p and n-n pairs. Besides an enhancement of proton-pair Coulomb energies, the pairing interaction is responsible for lowering the Coulomb energy of N = Z members of isospin triplets and also gives rise to an important term in the second energy difference. Using pairing strengths derived from fitting energy levels for mass-18 and mass-42 nuclei, results of the calculation reproduce experimental second energy differences extremely well.

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Cited by (1)

  • Energy levels of A = 21-44 nuclei (VI)

    1978, Nuclear Physics, Section A
Work suppported in part by tha US Atomic Energy Commission and the National Science Foundation.

Work supported in part by the US Atomic Energy Commission and the National Science foundation

Present address: City College of San Francisco, San Francisco, California.

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