Direct Mass Measurements ofB19,C22,F29,Ne31,Na34and Other Light Exotic Nuclei
| Autor: | A. Gillibert, Stefanos Paschalis, B. Fernández-Domínguez, G. Frémont, J. F. Libin, B. Pietras, P. Roussel-Chomaz, W. Mittig, Yu. E. Penionzhkevich, N. A. Orr, V. A. Maslov, Antonio Villari, S. Grévy, P. Gangnant, C. Spitaels, L. Gaudefroy, S. Varet, Marielle Chartier, J. P. Ebran |
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| Rok vydání: | 2012 |
| Předmět: |
Physics
Valence (chemistry) Isotope 010308 nuclear & particles physics Nuclear Theory General Physics and Astronomy Isotopes of boron Mass spectrometry Isotopes of sodium 7. Clean energy 01 natural sciences Isotopes of neon 0103 physical sciences Neutron Halo Atomic physics Nuclear Experiment 010306 general physics |
| Zdroj: | Physical Review Letters. 109 |
| ISSN: | 1079-7114 0031-9007 |
| Popis: | We report on direct time-of-flight based mass measurements of 16 light neutron-rich nuclei. These include the first determination of the masses of the Borromean drip-line nuclei (19)B, (22)C, and (29)F as well as that of (34)Na. In addition, the most precise determinations to date for (23)N and (31)Ne are reported. Coupled with recent interaction cross-section measurements, the present results support the occurrence of a two-neutron halo in (22)C, with a dominant ν2s(1/2)(2) configuration, and a single-neutron halo in (31)Ne with the valence neutron occupying predominantly the 2p(3/2) orbital. Despite a very low two-neutron separation energy the development of a halo in (19)B is hindered by the 1d(5/2)(2) character of the valence neutrons. |
| Databáze: | OpenAIRE |
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