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Journal Articles Physics Letters B Year : 2000

The $\alpha$-particle in nuclear matter

M. Beyer
  • Function : Author
S.A. Sofianos
  • Function : Author
C. Kuhrts
  • Function : Author
G. Roepke
  • Function : Author


Among the light nuclear clusters the alpha-particle is by far the strongest bound system and therefore expected to play a significant role in the dynamics of nuclei and the phases of nuclear matter. To systematically study the properties of the alpha-particle we have derived an effective four-body equation of the Alt-Grassberger-Sandhas (AGS) type that includes the dominant medium effects, i.e. self energy corrections and Pauli-blocking in a consistent way. The equation is solved utilizing the energy dependent pole expansion for the sub system amplitudes. We find that the Mott transition of an alpha-particle at rest differs from that expected from perturbation theory and occurs at approximately 1/10 of nuclear matter densities.

Dates and versions

in2p3-00006008 , version 1 (07-09-2000)



M. Beyer, S.A. Sofianos, C. Kuhrts, G. Roepke, P. Schuck. The $\alpha$-particle in nuclear matter. Physics Letters B, 2000, 488, pp.247-253. ⟨10.1016/S0370-2693(00)00908-4⟩. ⟨in2p3-00006008⟩
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