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Third Order Anharmonic Effects in Many-Body Nuclear Quantum Theory

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Abstract

The quantum theory of third order anharmonic effects in the photon production amplitude developed by V.A. Khodel has been generalized for nuclei with pairing and for a more accurate description of low-energy collective phonons. An expression for the transition amplitude between two- and one-phonon states has been obtained. This expression has been compared to the solution of a similar problem considered within the quasiparticle–phonon model. It has been shown that this approach describes a number of new effects, including three- and four-quasiparticle correlations in the ground state (backward-going graphs).

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Correspondence to S. P. Kamerdzhiev.

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Russian Text © S.P. Kamerdzhiev, M.I. Shitov, 2019, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2019, Vol. 109, No. 1, pp. 65–71.

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Kamerdzhiev, S.P., Shitov, M.I. Third Order Anharmonic Effects in Many-Body Nuclear Quantum Theory. Jetp Lett. 109, 69–75 (2019). https://doi.org/10.1134/S0021364019010090

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  • DOI: https://doi.org/10.1134/S0021364019010090

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