High-precision quadrupole moment reveals significant intruder component in Al20 1333 ground state

H. Heylen; M. De Rydt; G. Neyens; M. L. Bissell; L. Caceres; R. Chevrier; J. M. Daugas; Y. Ichikawa; Y. Ishibashi; O. Kamalou; T. J. Mertzimekis; P. Morel; J. Papuga; A. Poves; M. M. Rajabali; C. Stödel; J. C. Thomas; H. Ueno; Y. Utsuno; N. Yoshida; A. Yoshimi

doi:10.1103/PhysRevC.94.034312

High-precision quadrupole moment reveals significant intruder component in Al20 1333 ground state

H. Heylen, M. De Rydt, G. Neyens, M. L. Bissell, L. Caceres, R. Chevrier, J. M. Daugas, Y. Ichikawa, Y. Ishibashi, O. Kamalou, T. J. Mertzimekis, P. Morel, J. Papuga, A. Poves, M. M. Rajabali, C. Stödel, J. C. Thomas, H. Ueno, Y. Utsuno, N. YoshidaA. Yoshimi

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13 Citations (Scopus)

Abstract

The electric quadrupole moment of the Al201333 ground state, located at the border of the island of inversion, was obtained using continuous-beam β-detected nuclear quadrupole resonance (β-NQR). From the measured quadrupole coupling constant νQ=2.31(4) MHz in an α-Al2O3 crystal, a precise value for the electric quadrupole moment is extracted: QsAl33=141(3) mb. A comparison with large-scale shell model calculations shows that Al33 has at least 50% intruder configurations in the ground state wave function, favoring the excitation of two neutrons across the N=20 shell gap. Al33 therefore clearly marks the gradual transition north of the deformed Na and Mg nuclei towards the normal Z≥14 isotopes.

Original language	English
Article number	034312
Journal	Physical Review C
Volume	94
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.94.034312
Publication status	Published - Sept 12 2016
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1103/PhysRevC.94.034312

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Heylen, H., De Rydt, M., Neyens, G., Bissell, M. L., Caceres, L., Chevrier, R., Daugas, J. M., Ichikawa, Y., Ishibashi, Y., Kamalou, O., Mertzimekis, T. J., Morel, P., Papuga, J., Poves, A., Rajabali, M. M., Stödel, C., Thomas, J. C., Ueno, H., Utsuno, Y., ... Yoshimi, A. (2016). High-precision quadrupole moment reveals significant intruder component in Al20 1333 ground state. Physical Review C, 94(3), Article 034312. https://doi.org/10.1103/PhysRevC.94.034312

Heylen, H, De Rydt, M, Neyens, G, Bissell, ML, Caceres, L, Chevrier, R, Daugas, JM, Ichikawa, Y, Ishibashi, Y, Kamalou, O, Mertzimekis, TJ, Morel, P, Papuga, J, Poves, A, Rajabali, MM, Stödel, C, Thomas, JC, Ueno, H, Utsuno, Y, Yoshida, N & Yoshimi, A 2016, 'High-precision quadrupole moment reveals significant intruder component in Al20 1333 ground state', Physical Review C, vol. 94, no. 3, 034312. https://doi.org/10.1103/PhysRevC.94.034312

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title = "High-precision quadrupole moment reveals significant intruder component in Al20 1333 ground state",

abstract = "The electric quadrupole moment of the Al201333 ground state, located at the border of the island of inversion, was obtained using continuous-beam β-detected nuclear quadrupole resonance (β-NQR). From the measured quadrupole coupling constant νQ=2.31(4) MHz in an α-Al2O3 crystal, a precise value for the electric quadrupole moment is extracted: QsAl33=141(3) mb. A comparison with large-scale shell model calculations shows that Al33 has at least 50% intruder configurations in the ground state wave function, favoring the excitation of two neutrons across the N=20 shell gap. Al33 therefore clearly marks the gradual transition north of the deformed Na and Mg nuclei towards the normal Z≥14 isotopes.",

author = "H. Heylen and {De Rydt}, M. and G. Neyens and Bissell, {M. L.} and L. Caceres and R. Chevrier and Daugas, {J. M.} and Y. Ichikawa and Y. Ishibashi and O. Kamalou and Mertzimekis, {T. J.} and P. Morel and J. Papuga and A. Poves and Rajabali, {M. M.} and C. St{\"o}del and Thomas, {J. C.} and H. Ueno and Y. Utsuno and N. Yoshida and A. Yoshimi",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = sep,

day = "12",

doi = "10.1103/PhysRevC.94.034312",

language = "English",

volume = "94",

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T1 - High-precision quadrupole moment reveals significant intruder component in Al20 1333 ground state

AU - Heylen, H.

AU - De Rydt, M.

AU - Neyens, G.

AU - Bissell, M. L.

AU - Caceres, L.

AU - Chevrier, R.

AU - Daugas, J. M.

AU - Ichikawa, Y.

AU - Ishibashi, Y.

AU - Kamalou, O.

AU - Mertzimekis, T. J.

AU - Morel, P.

AU - Papuga, J.

AU - Poves, A.

AU - Rajabali, M. M.

AU - Stödel, C.

AU - Thomas, J. C.

AU - Ueno, H.

AU - Utsuno, Y.

AU - Yoshida, N.

AU - Yoshimi, A.

PY - 2016/9/12

Y1 - 2016/9/12

N2 - The electric quadrupole moment of the Al201333 ground state, located at the border of the island of inversion, was obtained using continuous-beam β-detected nuclear quadrupole resonance (β-NQR). From the measured quadrupole coupling constant νQ=2.31(4) MHz in an α-Al2O3 crystal, a precise value for the electric quadrupole moment is extracted: QsAl33=141(3) mb. A comparison with large-scale shell model calculations shows that Al33 has at least 50% intruder configurations in the ground state wave function, favoring the excitation of two neutrons across the N=20 shell gap. Al33 therefore clearly marks the gradual transition north of the deformed Na and Mg nuclei towards the normal Z≥14 isotopes.

AB - The electric quadrupole moment of the Al201333 ground state, located at the border of the island of inversion, was obtained using continuous-beam β-detected nuclear quadrupole resonance (β-NQR). From the measured quadrupole coupling constant νQ=2.31(4) MHz in an α-Al2O3 crystal, a precise value for the electric quadrupole moment is extracted: QsAl33=141(3) mb. A comparison with large-scale shell model calculations shows that Al33 has at least 50% intruder configurations in the ground state wave function, favoring the excitation of two neutrons across the N=20 shell gap. Al33 therefore clearly marks the gradual transition north of the deformed Na and Mg nuclei towards the normal Z≥14 isotopes.

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High-precision quadrupole moment reveals significant intruder component in Al20 1333 ground state

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