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New precision mass measurements of neutron-rich calcium and potassium isotopes and three-nucleon forces
- Source :
- Phys. Rev. Lett. 109, 032506 (2012)
- Publication Year :
- 2012
-
Abstract
- We present precision Penning-trap mass measurements of neutron-rich calcium and potassium isotopes in the vicinity of neutron number N=32. Using the TITAN system the mass of $^{51}$K was measured for the first time, and the precision of the $^{51,52}$Ca mass values were improved significantly. The new mass values show a dramatic increase of the binding energy compared to those reported in the atomic mass evaluation. In particular, $^{52}$Ca is more bound by 1.74 MeV, and the behavior with neutron number deviates substantially from the tabulated values. An increased binding was predicted recently based on calculations that include three-nucleon (3N) forces. We present a comparison to improved calculations, which agree remarkably with the evolution of masses with neutron number, making neutron-rich calcium isotopes an exciting region to probe 3N forces at neutron-rich extremes.<br />Comment: 5 pages, 3 figures, submitted to PRL
- Subjects :
- Nuclear Experiment
Nuclear Theory
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 109, 032506 (2012)
- Publication Type :
- Report
- Accession number :
- edsarx.1204.1987
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.109.032506