Observation of a crossover of S2n in the island of inversion from precision mass spectrometry

A. A. Kwiatkowski; C. Andreoiu; J. C. Bale; A. Chaudhuri; U. Chowdhury; S. Malbrunot-Ettenauer; A. T. Gallant; A. Grossheim; G. Gwinner; A. Lennarz; T. D. Macdonald; T. J.M. Rauch; B. E. Schultz; S. Seeraji; M. C. Simon; V. V. Simon; D. Lunney; A. Poves; J. Dilling

doi:10.1103/PhysRevC.92.061301

Observation of a crossover of S2n in the island of inversion from precision mass spectrometry

A. A. Kwiatkowski, C. Andreoiu, J. C. Bale, A. Chaudhuri, U. Chowdhury, S. Malbrunot-Ettenauer, A. T. Gallant, A. Grossheim, G. Gwinner, A. Lennarz, T. D. Macdonald, T. J.M. Rauch, B. E. Schultz, S. Seeraji, M. C. Simon, V. V. Simon, D. Lunney, A. Poves, J. Dilling

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Abstract

Mass measurements have been performed of the neutron-rich Al isotopes near N≈20, along the island of inversion. In general, the precision of the mass values was improved by an order of magnitude. Based on these new and more accurate data, we find the two-neutron separation energy of Al1334 to be 24.8(10.8) keV less than that of Mg1233. This represents the first known crossover on the S2n surface of the chart of nuclides. Large-scale shell-model calculations show that the crossover can be attributed to exceptionally large energy gains of the Mg isotopes in the island of inversion.

Original language	English
Article number	061301
Journal	Physical Review C - Nuclear Physics
Volume	92
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.92.061301
State	Published - Dec 7 2015
Externally published	Yes

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Kwiatkowski, A. A., Andreoiu, C., Bale, J. C., Chaudhuri, A., Chowdhury, U., Malbrunot-Ettenauer, S., Gallant, A. T., Grossheim, A., Gwinner, G., Lennarz, A., Macdonald, T. D., Rauch, T. J. M., Schultz, B. E., Seeraji, S., Simon, M. C., Simon, V. V., Lunney, D., Poves, A., & Dilling, J. (2015). Observation of a crossover of S2n in the island of inversion from precision mass spectrometry. Physical Review C - Nuclear Physics, 92(6), Article 061301. https://doi.org/10.1103/PhysRevC.92.061301

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title = "Observation of a crossover of S2n in the island of inversion from precision mass spectrometry",

abstract = "Mass measurements have been performed of the neutron-rich Al isotopes near N≈20, along the island of inversion. In general, the precision of the mass values was improved by an order of magnitude. Based on these new and more accurate data, we find the two-neutron separation energy of Al1334 to be 24.8(10.8) keV less than that of Mg1233. This represents the first known crossover on the S2n surface of the chart of nuclides. Large-scale shell-model calculations show that the crossover can be attributed to exceptionally large energy gains of the Mg isotopes in the island of inversion.",

author = "Kwiatkowski, {A. A.} and C. Andreoiu and Bale, {J. C.} and A. Chaudhuri and U. Chowdhury and S. Malbrunot-Ettenauer and Gallant, {A. T.} and A. Grossheim and G. Gwinner and A. Lennarz and Macdonald, {T. D.} and Rauch, {T. J.M.} and Schultz, {B. E.} and S. Seeraji and Simon, {M. C.} and Simon, {V. V.} and D. Lunney and A. Poves and J. Dilling",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = dec,

day = "7",

doi = "10.1103/PhysRevC.92.061301",

language = "English",

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Kwiatkowski, AA, Andreoiu, C, Bale, JC, Chaudhuri, A, Chowdhury, U, Malbrunot-Ettenauer, S, Gallant, AT, Grossheim, A, Gwinner, G, Lennarz, A, Macdonald, TD, Rauch, TJM, Schultz, BE, Seeraji, S, Simon, MC, Simon, VV, Lunney, D, Poves, A & Dilling, J 2015, 'Observation of a crossover of S2n in the island of inversion from precision mass spectrometry', Physical Review C - Nuclear Physics, vol. 92, no. 6, 061301. https://doi.org/10.1103/PhysRevC.92.061301

TY - JOUR

T1 - Observation of a crossover of S2n in the island of inversion from precision mass spectrometry

AU - Kwiatkowski, A. A.

AU - Andreoiu, C.

AU - Bale, J. C.

AU - Chaudhuri, A.

AU - Chowdhury, U.

AU - Malbrunot-Ettenauer, S.

AU - Gallant, A. T.

AU - Grossheim, A.

AU - Gwinner, G.

AU - Lennarz, A.

AU - Macdonald, T. D.

AU - Rauch, T. J.M.

AU - Schultz, B. E.

AU - Seeraji, S.

AU - Simon, M. C.

AU - Simon, V. V.

AU - Lunney, D.

AU - Poves, A.

AU - Dilling, J.

PY - 2015/12/7

Y1 - 2015/12/7

N2 - Mass measurements have been performed of the neutron-rich Al isotopes near N≈20, along the island of inversion. In general, the precision of the mass values was improved by an order of magnitude. Based on these new and more accurate data, we find the two-neutron separation energy of Al1334 to be 24.8(10.8) keV less than that of Mg1233. This represents the first known crossover on the S2n surface of the chart of nuclides. Large-scale shell-model calculations show that the crossover can be attributed to exceptionally large energy gains of the Mg isotopes in the island of inversion.

AB - Mass measurements have been performed of the neutron-rich Al isotopes near N≈20, along the island of inversion. In general, the precision of the mass values was improved by an order of magnitude. Based on these new and more accurate data, we find the two-neutron separation energy of Al1334 to be 24.8(10.8) keV less than that of Mg1233. This represents the first known crossover on the S2n surface of the chart of nuclides. Large-scale shell-model calculations show that the crossover can be attributed to exceptionally large energy gains of the Mg isotopes in the island of inversion.

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DO - 10.1103/PhysRevC.92.061301

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VL - 92

JO - Physical Review C - Nuclear Physics

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IS - 6

M1 - 061301

ER -

Observation of a crossover of S2n in the island of inversion from precision mass spectrometry

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