Rios A, Polls A, Dickhoff W H
1Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH UK.
2Departament de Fsica Quàntica i Astrofísica and Institut de Ciènces del Cosmos, Universitat de Barcelona, Avinguda Diagonal 647, 8028 Barcelona, Spain.
J Low Temp Phys. 2017;189(5):234-249. doi: 10.1007/s10909-017-1818-7. Epub 2017 Oct 20.
The structure and density dependence of the pairing gap in infinite matter is relevant for astrophysical phenomena and provides a starting point for the discussion of pairing properties in nuclear structure. Short-range correlations can significantly deplete the available single-particle strength around the Fermi surface and thus provide a reduction mechanism of the pairing gap. Here, we study this effect in the singlet and triplet channels of both neutron matter and symmetric nuclear matter. Our calculations use phase-shift equivalent interactions and chiral two-body and three-body interactions as a starting point. We find an unambiguous reduction of the gap in all channels with very small dependence on the NN force in the singlet neutron matter and the triplet nuclear matter channel. In the latter channel, SRC alone provide a 50% reduction of the pairing gap.
无限核物质中配对能隙的结构和密度依赖性与天体物理现象相关，并且为讨论核结构中的配对性质提供了一个起点。短程关联能够显著耗尽费米面附近可用的单粒子强度，从而提供一种配对能隙的减小机制。在此，我们研究了中子物质和对称核物质的单重态和三重态通道中的这种效应。我们的计算以相移等效相互作用以及手征两体和三体相互作用作为起点。我们发现，在所有通道中能隙都有明确的减小，在单重态中子物质和三重态核物质通道中对核子 - 核子相互作用的依赖性非常小。在后一个通道中，仅短程关联就使配对能隙减小了50%。
