Reaction mechanisms of pair transfer

Details Reaction mechanisms of pair transfer Reaction mechanisms of pair transfer

2012-04-13

arxiv.org/abs/1204.3054v1

Physics

Nuclear Physics

Nuclear Theory

14 pages, 3 figures, chapter in "50 Years of Nuclear BCS", edited by R. A. Broglia and V. Zelevinsky. Uses WS macros (included

Scientific paper

The mechanisms of nuclear transfer reactions are described for the transfer of two nucleons from one nucleus to another. Two-nucleon overlap functions are defined in various coordinate systems, and their transformation coefficients given between coordinate systems. Post and prior couplings are defined for sequential transfer mechanisms, and it is demonstrated that the combination of `prior-post' couplings avoids non-orthogonality terms, but does not avoid couplings that do not have good zero-range approximations. The simultaneous and sequential mechanisms are demonstrated for the $^{124}$Sn(p,t)$^{122}$Sn reaction at 25 MeV using shell-model overlap functions. The interference between the various simultaneous and sequential amplitudes is shown.

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