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Journal Article

New Precision Mass Measurements of Neutron-Rich Calcium and Potassium Isotopes and Three-Nucleon Forces

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons37933

Simon,  Vanessa V.
TRIUMF, University of British Columbia, 4004 Wesbrook Mall, Vancouver;
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Fakulät für Physik und Astronomie, Ruprecht-Karls-Universität Heidelberg;

Fulltext (public)

1204.1987v1
(Preprint), 569KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Gallant, A., Bale, J., Brunner, T., Chowdhury, U., Ettenauer, S., Lennarz, A., et al. (2012). New Precision Mass Measurements of Neutron-Rich Calcium and Potassium Isotopes and Three-Nucleon Forces. Physical Review Letters, 109(3): 032506, pp. 1-5. doi:10.1103/PhysRevLett.109.032506.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-D1CB-C
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 51K was measured for the first time, and the precision of the 51,52Ca 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, 52Ca 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