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Infrared length scale and extrapolations for the no-core shell model

K. A. Wendt ; Christian Forssén (Institutionen för fundamental fysik) ; T. Papenbrock ; Daniel Sääf (Institutionen för fundamental fysik)
Physical Review C. Nuclear Physics (0556-2813). Vol. 91 (2015), 6, p. Art. no. 061301.
[Artikel, refereegranskad vetenskaplig]

We precisely determine the infrared (IR) length scale of the no-core shell model (NCSM). In the NCSM, the A-body Hilbert space is truncated by the total energy, and the IR length can be determined by equating the intrinsic kinetic energy of A nucleons in the NCSM space to that of A nucleons in a 3(A - 1)-dimensional hyper-radial well with a Dirichlet boundary condition for the hyper radius. We demonstrate that this procedure indeed yields a very precise IR length by performing large-scale NCSM calculations for Li-6. We apply our result and perform accurate IR extrapolations for bound states of He-4, He-6, Li-6, and Li-7. We also attempt to extrapolate NCSM results for B-10 and O-16 with bare interactions from chiral effective field theory over tens of MeV.

Denna post skapades 2015-06-30. Senast ändrad 2015-12-17.
CPL Pubid: 219101


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Denna publikation ingår i:

Bridging scales in nuclear physics



Denna publikation är ett resultat av följande projekt:

Ab initio approach to nuclear structure and reactions (++) (ANSR) (EC/FP7/240603)