Structure of <sup>30</sup>Mg explored via in-beam ?-ray spectroscopy [electronic resource]
In the island of inversion, ground states of neutron-rich sd-shell nuclei exhibit strong admixtures of intruder configurations from the fp shell. The nucleus <sup>30</sup>Mg, located at the boundary of the island of inversion, serves as a cornerstone to track the structural evolution as...
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| Format: | Government Document Electronic eBook |
| Language: | English |
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Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. Office of Science ; Distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2020.
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| Subjects: |
MARC
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| 245 | 0 | 0 | |a Structure of <sup>30</sup>Mg explored via in-beam ?-ray spectroscopy |h [electronic resource] |
| 260 | |a Washington, D.C. : |b United States. Department of Energy. Office of Science ; |a Oak Ridge, Tenn. : |b Distributed by the Office of Scientific and Technical Information, U.S. Department of Energy, |c 2020. | ||
| 300 | |a Size: Article No. 054318 : |b digital, PDF file. | ||
| 336 | |a text |b txt |2 rdacontent. | ||
| 337 | |a computer |b c |2 rdamedia. | ||
| 338 | |a online resource |b cr |2 rdacarrier. | ||
| 500 | |a Published through Scitech Connect. | ||
| 500 | |a 11/12/2020. | ||
| 500 | |a "Journal ID: ISSN 2469-9985." | ||
| 500 | |a ": US2204703." | ||
| 500 | |a Kitamura, N. ; Wimmer, K. ; Shimizu, N. ; Bader, V. M. ; Bancroft, C. ; Barofsky, D. ; Baugher, T. ; Bazin, D. ; Berryman, J. S. ; Bildstein, V. ; et al. | ||
| 500 | |a Michigan State Univ., East Lansing, MI (United States) | ||
| 520 | 3 | |a In the island of inversion, ground states of neutron-rich sd-shell nuclei exhibit strong admixtures of intruder configurations from the fp shell. The nucleus <sup>30</sup>Mg, located at the boundary of the island of inversion, serves as a cornerstone to track the structural evolution as one approaches this region. Spin-parity assignments for excited states in <sup>30</sup>Mg, especially negative-parity levels, have yet to be established. In the present work, the nuclear structure of 30Mg was investigated by in-beam gamma-ray spectroscopy mainly focusing on firm spin-parity determinations. High-intensity rare-isotope beams of <sup>31</sup>Mg, <sup>32</sup>Mg, <sup>34</sup>Si, and <sup>35</sup>P bombarded a Be target to induce nucleon removal reactions populating states in <sup>30</sup>Mg. Gamma rays were detected by the state-of-the-art gamma-ray tracking array GRETINA. For the direct one-neutron removal reaction, final-state exclusive cross sections and parallel momentum distributions were deduced. Multi-nucleon removal reactions from different projectiles were exploited to gain complementary information. With the aid of the parallel momentum distributions, an updated level scheme with revised spin-parity assignments was constructed. Spectroscopic factors associated with each state were also deduced. Results were confronted with large-scale shell-model calculations using two different effective interactions, showing excellent agreement with the present level scheme. Furthermore, a marked difference in the spectroscopic factors indicates that the full delineation of the transition into the island of inversion remains a challenge for theoretical models. | |
| 536 | |b SC0020451. | ||
| 536 | |b PHY-1306297. | ||
| 536 | |b AC02-05CH11231. | ||
| 650 | 7 | |a 73 nuclear physics and radiation physics |2 local. | |
| 650 | 7 | |a Direct reactions |2 local. | |
| 650 | 7 | |a Energy levels & level densities |2 local. | |
| 650 | 7 | |a Nuclear fragmentation |2 local. | |
| 650 | 7 | |a Nuclear spin & parity |2 local. | |
| 650 | 7 | |a Nuclear structure & decays |2 local. | |
| 650 | 7 | |a Spectroscopic factors & electromagnetic moments |2 local. | |
| 650 | 7 | |a 20 ? a ? 38 |2 local. | |
| 650 | 7 | |a Radioactive beams |2 local. | |
| 650 | 7 | |a Shell model |2 local. | |
| 650 | 7 | |a Nuclear physics and radiation physics |2 local. | |
| 650 | 7 | |a ? a ? 38 |2 local. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Office of Science. |4 spn. | |
| 710 | 2 | |a National Science Foundation (U.S.). |4 spn. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Chicago Operations Office. |f res. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Office of Scientific and Technical Information |4 dst. | |
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