Search for neutron decoupling in O22 via the (d,d'γ) reaction

Z. Elekes; Zs Dombrádi; N. Aoi; S. Bishop; Zs Fülöp; J. Gibelin; T. Gomi; Y. Hashimoto; N. Imai; N. Iwasa; H. Iwasaki; G. Kalinka; Y. Kondo; A. A. Korsheninnikov; K. Kurita; M. Kurokawa; N. Matsui; T. Motobayashi; T. Nakamura; T. Nakao; E. Yu Nikolskii; T. K. Ohnishi; T. Okumura; S. Ota; A. Perera; A. Saito; H. Sakurai; Y. Satou; D. Sohler; T. Sumikama; D. Suzuki; M. Suzuki; H. Takeda; S. Takeuchi; Y. Togano; Y. Yanagisawa

doi:10.1103/PhysRevC.74.017306

Search for neutron decoupling in O22 via the (d,d'γ) reaction

Z. Elekes, Zs Dombrádi, N. Aoi, S. Bishop, Zs Fülöp, J. Gibelin, T. Gomi, Y. Hashimoto, N. Imai, N. Iwasa, H. Iwasaki, G. Kalinka, Y. Kondo, A. A. Korsheninnikov, K. Kurita, M. Kurokawa, N. Matsui, T. Motobayashi, T. Nakamura, T. NakaoE. Yu Nikolskii, T. K. Ohnishi, T. Okumura, S. Ota, A. Perera, A. Saito, H. Sakurai, Y. Satou, D. Sohler, T. Sumikama, D. Suzuki, M. Suzuki, H. Takeda, S. Takeuchi, Y. Togano, Y. Yanagisawa

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Abstract

We have searched for valence neutron decoupling in O22, a phenomenon recently observed in neutron-rich C, B, and lighter O nuclei. From the cross section of the (d,d'γ) reaction for the transition between the ground state and the first 2+ state of O22, the neutron and proton deformation parameters have been deduced by distorted wave analysis using and reanalyzing the data of a previous Coulomb excitation measurement. The ratio of the neutron and proton multipole transition matrix elements Mn/Mp compared to the N/Z value has been derived to be around 1. This result indicates that the O22 isotope has small and similar neutron and proton deformations, which is consistent with N=14 shell closure. Thus, the concept of neutron decoupling does not hold for this nucleus.

Original language	English
Article number	017306
Journal	Physical Review C - Nuclear Physics
Volume	74
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.74.017306
State	Published - 2006
Externally published	Yes

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Elekes, Z., Dombrádi, Z., Aoi, N., Bishop, S., Fülöp, Z., Gibelin, J., Gomi, T., Hashimoto, Y., Imai, N., Iwasa, N., Iwasaki, H., Kalinka, G., Kondo, Y., Korsheninnikov, A. A., Kurita, K., Kurokawa, M., Matsui, N., Motobayashi, T., Nakamura, T., ... Yanagisawa, Y. (2006). Search for neutron decoupling in O22 via the (d,d'γ) reaction. Physical Review C - Nuclear Physics, 74(1), Article 017306. https://doi.org/10.1103/PhysRevC.74.017306

@article{b748a71f882b4805b8bde43cf675d05e,

title = "Search for neutron decoupling in O22 via the (d,d'γ) reaction",

abstract = "We have searched for valence neutron decoupling in O22, a phenomenon recently observed in neutron-rich C, B, and lighter O nuclei. From the cross section of the (d,d'γ) reaction for the transition between the ground state and the first 2+ state of O22, the neutron and proton deformation parameters have been deduced by distorted wave analysis using and reanalyzing the data of a previous Coulomb excitation measurement. The ratio of the neutron and proton multipole transition matrix elements Mn/Mp compared to the N/Z value has been derived to be around 1. This result indicates that the O22 isotope has small and similar neutron and proton deformations, which is consistent with N=14 shell closure. Thus, the concept of neutron decoupling does not hold for this nucleus.",

author = "Z. Elekes and Zs Dombr{\'a}di and N. Aoi and S. Bishop and Zs F{\"u}l{\"o}p and J. Gibelin and T. Gomi and Y. Hashimoto and N. Imai and N. Iwasa and H. Iwasaki and G. Kalinka and Y. Kondo and Korsheninnikov, {A. A.} and K. Kurita and M. Kurokawa and N. Matsui and T. Motobayashi and T. Nakamura and T. Nakao and Nikolskii, {E. Yu} and Ohnishi, {T. K.} and T. Okumura and S. Ota and A. Perera and A. Saito and H. Sakurai and Y. Satou and D. Sohler and T. Sumikama and D. Suzuki and M. Suzuki and H. Takeda and S. Takeuchi and Y. Togano and Y. Yanagisawa",

year = "2006",

doi = "10.1103/PhysRevC.74.017306",

language = "English",

volume = "74",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "1",

}

Elekes, Z, Dombrádi, Z, Aoi, N, Bishop, S, Fülöp, Z, Gibelin, J, Gomi, T, Hashimoto, Y, Imai, N, Iwasa, N, Iwasaki, H, Kalinka, G, Kondo, Y, Korsheninnikov, AA, Kurita, K, Kurokawa, M, Matsui, N, Motobayashi, T, Nakamura, T, Nakao, T, Nikolskii, EY, Ohnishi, TK, Okumura, T, Ota, S, Perera, A, Saito, A, Sakurai, H, Satou, Y, Sohler, D, Sumikama, T, Suzuki, D, Suzuki, M, Takeda, H, Takeuchi, S, Togano, Y & Yanagisawa, Y 2006, 'Search for neutron decoupling in O22 via the (d,d'γ) reaction', Physical Review C - Nuclear Physics, vol. 74, no. 1, 017306. https://doi.org/10.1103/PhysRevC.74.017306

TY - JOUR

T1 - Search for neutron decoupling in O22 via the (d,d'γ) reaction

AU - Elekes, Z.

AU - Dombrádi, Zs

AU - Aoi, N.

AU - Bishop, S.

AU - Fülöp, Zs

AU - Gibelin, J.

AU - Gomi, T.

AU - Hashimoto, Y.

AU - Imai, N.

AU - Iwasa, N.

AU - Iwasaki, H.

AU - Kalinka, G.

AU - Kondo, Y.

AU - Korsheninnikov, A. A.

AU - Kurita, K.

AU - Kurokawa, M.

AU - Matsui, N.

AU - Motobayashi, T.

AU - Nakamura, T.

AU - Nakao, T.

AU - Nikolskii, E. Yu

AU - Ohnishi, T. K.

AU - Okumura, T.

AU - Ota, S.

AU - Perera, A.

AU - Saito, A.

AU - Sakurai, H.

AU - Satou, Y.

AU - Sohler, D.

AU - Sumikama, T.

AU - Suzuki, D.

AU - Suzuki, M.

AU - Takeda, H.

AU - Takeuchi, S.

AU - Togano, Y.

AU - Yanagisawa, Y.

PY - 2006

Y1 - 2006

N2 - We have searched for valence neutron decoupling in O22, a phenomenon recently observed in neutron-rich C, B, and lighter O nuclei. From the cross section of the (d,d'γ) reaction for the transition between the ground state and the first 2+ state of O22, the neutron and proton deformation parameters have been deduced by distorted wave analysis using and reanalyzing the data of a previous Coulomb excitation measurement. The ratio of the neutron and proton multipole transition matrix elements Mn/Mp compared to the N/Z value has been derived to be around 1. This result indicates that the O22 isotope has small and similar neutron and proton deformations, which is consistent with N=14 shell closure. Thus, the concept of neutron decoupling does not hold for this nucleus.

AB - We have searched for valence neutron decoupling in O22, a phenomenon recently observed in neutron-rich C, B, and lighter O nuclei. From the cross section of the (d,d'γ) reaction for the transition between the ground state and the first 2+ state of O22, the neutron and proton deformation parameters have been deduced by distorted wave analysis using and reanalyzing the data of a previous Coulomb excitation measurement. The ratio of the neutron and proton multipole transition matrix elements Mn/Mp compared to the N/Z value has been derived to be around 1. This result indicates that the O22 isotope has small and similar neutron and proton deformations, which is consistent with N=14 shell closure. Thus, the concept of neutron decoupling does not hold for this nucleus.

UR - http://www.scopus.com/inward/record.url?scp=33746118698&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.74.017306

DO - 10.1103/PhysRevC.74.017306

M3 - Article

AN - SCOPUS:33746118698

SN - 0556-2813

VL - 74

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 1

M1 - 017306

ER -

Search for neutron decoupling in O22 via the (d,d'γ) reaction

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