تقرير
Dawning of the N=32 shell closure seen through precision mass measurements of neutron-rich titanium isotopes
| العنوان: | Dawning of the N=32 shell closure seen through precision mass measurements of neutron-rich titanium isotopes |
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| المؤلفون: | Leistenschneider, E., Reiter, M. P., Andrés, S. Ayet San, Kootte, B., Holt, J. D., Navrátil, P., Babcock, C., Barbieri, C., Barquest, B. R., Bergmann, J., Bollig, J., Brunner, T., Dunling, E., Finlay, A., Geissel, H., Graham, L., Greiner, F., Hergert, H., Hornung, C., Jesch, C., Klawitter, R., Lan, Y., Lascar, D., Leach, K. G., Lippert, W., McKay, J. E., Paul, S. F., Schwenk, A., Short, D., Simonis, J., Somà, V., Steinbrügge, R., Stroberg, S. R., Thompson, R., Wieser, M. E., Will, C., Yavor, M., Andreoiu, C., Dickel, T., Dillmann, I., Gwinner, G., Plaß, W. R., Scheidenberger, C., Kwiatkowski, A. A., Dilling, J. |
| المصدر: | Phys. Rev. Lett. 120, 062503 (2018) |
| سنة النشر: | 2017 |
| المجموعة: | Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Experiment, Nuclear Theory |
| الوصف: | A precision mass investigation of the neutron-rich titanium isotopes $^{51-55}$Ti was performed at TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). The range of the measurements covers the $N=32$ shell closure and the overall uncertainties of the $^{52-55}$Ti mass values were significantly reduced. Our results confirm the existence of a weak shell effect at $N=32$, establishing the abrupt onset of this shell closure. Our data were compared with state-of-the-art \textit{ab-initio} shell model calculations which, despite very successfully describing where the $N=32$ shell gap is strong, overpredict its strength and extent in titanium and heavier isotones. These measurements also represent the first scientific results of TITAN using the newly commissioned Multiple-Reflection Time-of-Flight Mass Spectrometer (MR-TOF-MS), substantiated by independent measurements from TITAN's Penning trap mass spectrometer. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.120.062503 |
| URL الوصول: | http://arxiv.org/abs/1710.08537 |
| رقم الأكسشن: | edsarx.1710.08537 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.120.062503 |
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