Measurement of the electric quadrupole moment of 32Al

D. Kameda; H. Ueno; K. Asahi; M. Takemura; A. Yoshimi; T. Haseyama; M. Uchida; K. Shimada; D. Nagae; G. Kijima; T. Arai; K. Takase; S. Suda; T. Inoue; J. Murata; H. Kawamura; Y. Kobayashi; H. Watanabe; M. Ishihara

doi:10.1016/j.physletb.2007.01.063

Measurement of the electric quadrupole moment of ³²Al

D. Kameda, H. Ueno, K. Asahi, M. Takemura, A. Yoshimi, T. Haseyama, M. Uchida, K. Shimada, D. Nagae, G. Kijima, T. Arai, K. Takase, S. Suda, T. Inoue, J. Murata, H. Kawamura, Y. Kobayashi, H. Watanabe, M. Ishihara

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22 Scopus citations

Abstract

The electric quadrupole moment Q for the ground state of ³²Al has been measured using the β-NMR technique. Spin-polarized ³²Al nuclei were obtained from the fragmentation of ⁴⁰Ar projectiles at E / A = 95 MeV / nucleon, and were implanted in a single crystal α-Al₂O₃ stopper. The quadrupole moment was deduced from the measured quadrupole coupling constant. The obtained value, | Q (³²Al_g.s.) | = 24 (2) mb, is remarkably small as compared with other Al isotopes, but is well explained by shell model calculations within the sd shell. The present result indicates that ³²Al has a normal sd-shell structure, in contrast to the neighboring N = 19 isotone ³¹Mg for which a strongly deformed intruder ground state has been reported to occur.

Original language	English
Pages (from-to)	93-97
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	647
Issue number	2-3
DOIs	https://doi.org/10.1016/j.physletb.2007.01.063
State	Published - 5 Apr 2007
Externally published	Yes

Keywords

Electric quadrupole moment of Al
Island of inversion
Nuclear deformation
Projectile fragmentation
β-NMR

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10.1016/j.physletb.2007.01.063

Cite this

Kameda, D., Ueno, H., Asahi, K., Takemura, M., Yoshimi, A., Haseyama, T., Uchida, M., Shimada, K., Nagae, D., Kijima, G., Arai, T., Takase, K., Suda, S., Inoue, T., Murata, J., Kawamura, H., Kobayashi, Y., Watanabe, H., & Ishihara, M. (2007). Measurement of the electric quadrupole moment of ³²Al. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 647(2-3), 93-97. https://doi.org/10.1016/j.physletb.2007.01.063

@article{a80f46eda60947078dc5a286c18faea1,

title = "Measurement of the electric quadrupole moment of 32Al",

abstract = "The electric quadrupole moment Q for the ground state of 32Al has been measured using the β-NMR technique. Spin-polarized 32Al nuclei were obtained from the fragmentation of 40Ar projectiles at E / A = 95 MeV / nucleon, and were implanted in a single crystal α-Al2O3 stopper. The quadrupole moment was deduced from the measured quadrupole coupling constant. The obtained value, | Q (32Alg.s.) | = 24 (2) mb, is remarkably small as compared with other Al isotopes, but is well explained by shell model calculations within the sd shell. The present result indicates that 32Al has a normal sd-shell structure, in contrast to the neighboring N = 19 isotone 31Mg for which a strongly deformed intruder ground state has been reported to occur.",

keywords = "Electric quadrupole moment of Al, Island of inversion, Nuclear deformation, Projectile fragmentation, β-NMR",

author = "D. Kameda and H. Ueno and K. Asahi and M. Takemura and A. Yoshimi and T. Haseyama and M. Uchida and K. Shimada and D. Nagae and G. Kijima and T. Arai and K. Takase and S. Suda and T. Inoue and J. Murata and H. Kawamura and Y. Kobayashi and H. Watanabe and M. Ishihara",

note = "Funding Information: The authors are grateful to staffs at the RIKEN Ring Cyclotron for their support during the running of the experiment. They would like to thank Dr. E. Yagi for useful help and advice with the X-ray diffraction analysis of the α-Al 2 O 3 sample. The authors D.K. and T.H. are grateful for the Special Postdoctoral Researcher Program in RIKEN. This work was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture. The experiment was performed at RIKEN under the Experimental-Program-No. R398n.",

year = "2007",

month = apr,

day = "5",

doi = "10.1016/j.physletb.2007.01.063",

language = "English",

volume = "647",

pages = "93--97",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

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}

Kameda, D, Ueno, H, Asahi, K, Takemura, M, Yoshimi, A, Haseyama, T, Uchida, M, Shimada, K, Nagae, D, Kijima, G, Arai, T, Takase, K, Suda, S, Inoue, T, Murata, J, Kawamura, H, Kobayashi, Y, Watanabe, H & Ishihara, M 2007, 'Measurement of the electric quadrupole moment of ³²Al', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 647, no. 2-3, pp. 93-97. https://doi.org/10.1016/j.physletb.2007.01.063

TY - JOUR

T1 - Measurement of the electric quadrupole moment of 32Al

AU - Kameda, D.

AU - Ueno, H.

AU - Asahi, K.

AU - Takemura, M.

AU - Yoshimi, A.

AU - Haseyama, T.

AU - Uchida, M.

AU - Shimada, K.

AU - Nagae, D.

AU - Kijima, G.

AU - Arai, T.

AU - Takase, K.

AU - Suda, S.

AU - Inoue, T.

AU - Murata, J.

AU - Kawamura, H.

AU - Kobayashi, Y.

AU - Watanabe, H.

AU - Ishihara, M.

N1 - Funding Information: The authors are grateful to staffs at the RIKEN Ring Cyclotron for their support during the running of the experiment. They would like to thank Dr. E. Yagi for useful help and advice with the X-ray diffraction analysis of the α-Al 2 O 3 sample. The authors D.K. and T.H. are grateful for the Special Postdoctoral Researcher Program in RIKEN. This work was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture. The experiment was performed at RIKEN under the Experimental-Program-No. R398n.

PY - 2007/4/5

Y1 - 2007/4/5

N2 - The electric quadrupole moment Q for the ground state of 32Al has been measured using the β-NMR technique. Spin-polarized 32Al nuclei were obtained from the fragmentation of 40Ar projectiles at E / A = 95 MeV / nucleon, and were implanted in a single crystal α-Al2O3 stopper. The quadrupole moment was deduced from the measured quadrupole coupling constant. The obtained value, | Q (32Alg.s.) | = 24 (2) mb, is remarkably small as compared with other Al isotopes, but is well explained by shell model calculations within the sd shell. The present result indicates that 32Al has a normal sd-shell structure, in contrast to the neighboring N = 19 isotone 31Mg for which a strongly deformed intruder ground state has been reported to occur.

AB - The electric quadrupole moment Q for the ground state of 32Al has been measured using the β-NMR technique. Spin-polarized 32Al nuclei were obtained from the fragmentation of 40Ar projectiles at E / A = 95 MeV / nucleon, and were implanted in a single crystal α-Al2O3 stopper. The quadrupole moment was deduced from the measured quadrupole coupling constant. The obtained value, | Q (32Alg.s.) | = 24 (2) mb, is remarkably small as compared with other Al isotopes, but is well explained by shell model calculations within the sd shell. The present result indicates that 32Al has a normal sd-shell structure, in contrast to the neighboring N = 19 isotone 31Mg for which a strongly deformed intruder ground state has been reported to occur.

KW - Electric quadrupole moment of Al

KW - Island of inversion

KW - Nuclear deformation

KW - Projectile fragmentation

KW - β-NMR

UR - http://www.scopus.com/inward/record.url?scp=33947148999&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2007.01.063

DO - 10.1016/j.physletb.2007.01.063

M3 - Article

AN - SCOPUS:33947148999

SN - 0370-2693

VL - 647

SP - 93

EP - 97

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 2-3