تقرير
New precision mass measurements of neutron-rich calcium and potassium isotopes and three-nucleon forces
| العنوان: | New precision mass measurements of neutron-rich calcium and potassium isotopes and three-nucleon forces |
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| المؤلفون: | Gallant, A. T., Bale, J. C., Brunner, T., Chowdhury, U., Ettenauer, S., Lennarz, A., Robertson, D., Simon, V. V., Chaudhuri, A., Holt, J. D., Kwiatkowski, A. A., Mané, E., Menéndez, J., Schultz, B. E., Simon, M. C., Andreoiu, C., Delheij, P., Pearson, M. R., Savajols, H., Schwenk, A., Dilling, J. |
| المصدر: | Phys. Rev. Lett. 109, 032506 (2012) |
| سنة النشر: | 2012 |
| المجموعة: | Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Experiment, Nuclear Theory |
| الوصف: | 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. Comment: 5 pages, 3 figures, submitted to PRL |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.109.032506 |
| URL الوصول: | http://arxiv.org/abs/1204.1987 |
| رقم الأكسشن: | edsarx.1204.1987 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.109.032506 |
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