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Correlation energy of4He

Authors
Journal
Nuclear Physics A
0375-9474
Publisher
Elsevier
Publication Date
Volume
134
Issue
3
Identifiers
DOI: 10.1016/0375-9474(69)90026-8

Abstract

Abstract We investigate the correlation energy in the ground state of 4He due to all 2ℏω excitations. An effective residual interaction derived from the Hamada-Johnston potential is used. Contributions from 2ℏω excitations are treated to all orders by diagonalization. These constributions are found to be relatively small (≈0.6 MeV particle ). It is found that the calculation is extremely sensitive to the presence of states with spurious center-of-mass motion. The spectrum of negative-parity 1ℏω states is calculated with the same interaction. The calculated spectrum is in only qualitative agreement with experiment.

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