Large deformation of the very neutron-rich nucleus 32Mg from intermediate-energy Coulomb excitation

T. Motobayashi; Y. Ikeda; K. Ieki; M. Inoue; N. Iwasa; T. Kikuchi; M. Kurokawa; S. Moriya; S. Ogawa; H. Murakami; S. Shimoura; Y. Yanagisawa; T. Nakamura; Y. Watanabe; M. Ishihara; T. Teranishi; H. Okuno; R. F. Casten

doi:10.1016/0370-2693(95)00012-A

Large deformation of the very neutron-rich nucleus ³²Mg from intermediate-energy Coulomb excitation

T. Motobayashi, Y. Ikeda, K. Ieki, M. Inoue, N. Iwasa, T. Kikuchi, M. Kurokawa, S. Moriya, S. Ogawa, H. Murakami, S. Shimoura, Y. Yanagisawa, T. Nakamura, Y. Watanabe, M. Ishihara, T. Teranishi, H. Okuno, R. F. Casten

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Abstract

The Coulomb excitation of a very neutron-rich nucleus ³²Mg to its 2⁺ state was studied using an unstable nuclear beam of ³²Mg at 49.2 MeV/u with a ²⁰⁸Pb target. The B(E2) value of 454±78 e²fm⁴ was extracted by a coupled channel analysis. The value is in good agreement with recent predictions. It confirms a large deformation for ³²Mg suggested by the low excitation energy of the 2⁺ state, and points to the vanishing of the N = 20 shell gap.

Original language	English
Pages (from-to)	9-14
Number of pages	6
Journal	Physics Letters B
Volume	346
Issue number	1-2
DOIs	https://doi.org/10.1016/0370-2693(95)00012-A
Publication status	Published - Mar 2 1995
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/0370-2693(95)00012-A

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Motobayashi, T., Ikeda, Y., Ieki, K., Inoue, M., Iwasa, N., Kikuchi, T., Kurokawa, M., Moriya, S., Ogawa, S., Murakami, H., Shimoura, S., Yanagisawa, Y., Nakamura, T., Watanabe, Y., Ishihara, M., Teranishi, T., Okuno, H., & Casten, R. F. (1995). Large deformation of the very neutron-rich nucleus ³²Mg from intermediate-energy Coulomb excitation. Physics Letters B, 346(1-2), 9-14. https://doi.org/10.1016/0370-2693(95)00012-A

Motobayashi, T, Ikeda, Y, Ieki, K, Inoue, M, Iwasa, N, Kikuchi, T, Kurokawa, M, Moriya, S, Ogawa, S, Murakami, H, Shimoura, S, Yanagisawa, Y, Nakamura, T, Watanabe, Y, Ishihara, M, Teranishi, T, Okuno, H & Casten, RF 1995, 'Large deformation of the very neutron-rich nucleus ³²Mg from intermediate-energy Coulomb excitation', Physics Letters B, vol. 346, no. 1-2, pp. 9-14. https://doi.org/10.1016/0370-2693(95)00012-A

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title = "Large deformation of the very neutron-rich nucleus 32Mg from intermediate-energy Coulomb excitation",

abstract = "The Coulomb excitation of a very neutron-rich nucleus 32Mg to its 2+ state was studied using an unstable nuclear beam of 32Mg at 49.2 MeV/u with a 208Pb target. The B(E2) value of 454±78 e2fm4 was extracted by a coupled channel analysis. The value is in good agreement with recent predictions. It confirms a large deformation for 32Mg suggested by the low excitation energy of the 2+ state, and points to the vanishing of the N = 20 shell gap.",

author = "T. Motobayashi and Y. Ikeda and K. Ieki and M. Inoue and N. Iwasa and T. Kikuchi and M. Kurokawa and S. Moriya and S. Ogawa and H. Murakami and S. Shimoura and Y. Yanagisawa and T. Nakamura and Y. Watanabe and M. Ishihara and T. Teranishi and H. Okuno and Casten, {R. F.}",

note = "Funding Information: We would like to thank the RIKEN Ring Cyclotron staffs for their help during the experiment. We acknowledge discussions with N. Fukunishi and T. Ot-suka. We are also grateful to J. Kiener for valuable suggestionsf or theoreticala nalysis. The presentw ork is supportedb y the Grant-In-Aid for Scientific Research of the Japan Ministry of Education, Science and Culture undert hep rogramn umbers0 4452029a nd 04740141,a nd by the U.S. Dept. of Energy under contract number DE-AC02-76CH00016.",

year = "1995",

month = mar,

day = "2",

doi = "10.1016/0370-2693(95)00012-A",

language = "English",

volume = "346",

pages = "9--14",

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

issn = "0370-2693",

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TY - JOUR

T1 - Large deformation of the very neutron-rich nucleus 32Mg from intermediate-energy Coulomb excitation

AU - Motobayashi, T.

AU - Ikeda, Y.

AU - Ieki, K.

AU - Inoue, M.

AU - Iwasa, N.

AU - Kikuchi, T.

AU - Kurokawa, M.

AU - Moriya, S.

AU - Ogawa, S.

AU - Murakami, H.

AU - Shimoura, S.

AU - Yanagisawa, Y.

AU - Nakamura, T.

AU - Watanabe, Y.

AU - Ishihara, M.

AU - Teranishi, T.

AU - Okuno, H.

AU - Casten, R. F.

N1 - Funding Information: We would like to thank the RIKEN Ring Cyclotron staffs for their help during the experiment. We acknowledge discussions with N. Fukunishi and T. Ot-suka. We are also grateful to J. Kiener for valuable suggestionsf or theoreticala nalysis. The presentw ork is supportedb y the Grant-In-Aid for Scientific Research of the Japan Ministry of Education, Science and Culture undert hep rogramn umbers0 4452029a nd 04740141,a nd by the U.S. Dept. of Energy under contract number DE-AC02-76CH00016.

PY - 1995/3/2

Y1 - 1995/3/2

N2 - The Coulomb excitation of a very neutron-rich nucleus 32Mg to its 2+ state was studied using an unstable nuclear beam of 32Mg at 49.2 MeV/u with a 208Pb target. The B(E2) value of 454±78 e2fm4 was extracted by a coupled channel analysis. The value is in good agreement with recent predictions. It confirms a large deformation for 32Mg suggested by the low excitation energy of the 2+ state, and points to the vanishing of the N = 20 shell gap.

AB - The Coulomb excitation of a very neutron-rich nucleus 32Mg to its 2+ state was studied using an unstable nuclear beam of 32Mg at 49.2 MeV/u with a 208Pb target. The B(E2) value of 454±78 e2fm4 was extracted by a coupled channel analysis. The value is in good agreement with recent predictions. It confirms a large deformation for 32Mg suggested by the low excitation energy of the 2+ state, and points to the vanishing of the N = 20 shell gap.

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U2 - 10.1016/0370-2693(95)00012-A

DO - 10.1016/0370-2693(95)00012-A

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AN - SCOPUS:0001932285

SN - 0370-2693

VL - 346

SP - 9

EP - 14

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 - 1-2

ER -

Large deformation of the very neutron-rich nucleus ³²Mg from intermediate-energy Coulomb excitation

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