More light on the structure of nuclei - Reply
- ORNL
I certainly agree that short-range correlations play a role in the interpretation of nuclear forces. in particular, present and future experiments at the Thomas Jefferson National Accelerator Facility will shed further light on those interesting phenomena. How the high-energy correlations affect nuclear structure and low-energy excitations remains an interesting problem in its own right. I note three points. First, unlike the density, the momentum distribution within a nucleus is not observable due to ambiguities that arise through possible field redefinitions in effective field theory. Second, the central repulsion of the Argonne V18 potential reaches more than 3 GeV. Augmenting AV18 with a three-body force reproduces nuclear structure information through carbon-12 and, as leonid Frankfurt and coauthors point out, appears to reproduce short-range correlation expectations. Third, using coupled-cluster theory, they recently calculated medium-mass nuclei through {sup 40}Ca, {sup 48}Ca, and {sup 48}Ni using another of the highly accurate two-nucleon potentials, but without including a three-body force. To obtain reasonably converged ground-state properties for those nuclei, the calculations require basis states covering an energy range of at least 450 MeV. They look forward to using ab initio calculations to study the short-range correlations induced by realistic nuclear potentials in medium-mass nuclei.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 992562
- Journal Information:
- Physics Today, Vol. 61, Issue 8; ISSN 0031-9228
- Country of Publication:
- United States
- Language:
- English
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