Pairing enhancement in a two-neutron transfer process through the continuum

2022/04/25 by G. Singh, Singh, Gagandeep, L. Fortunato +3
Physics and Astronomy · Chemistry · #Atomic and Subatomic Physics Research #Quantum, superfluid, helium dynamics #Advanced NMR Techniques and Applications

paper · pdf · doi:10.48550/arxiv.2204.11739

Abstract

Enhancement, due to constructive interference through the many possible reaction channels, occurs in two-neutron transfer reactions from a bound system A to a weakly-bound system (A+2), whenever the intermediate system is unbound and consists of a continuum with a resonant state. We elucidate this phenomenon in the case of ⁶He, modeled as two neutrons in the orbitals of an intermediate ⁵He nucleus, comparing the realistic case of an unbound (A+1) system with an artificially bound case. A properly modeled continuum in these calculations is found to be crucial and leads to significant enhancement due to pairing correlations.

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