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

Research output: Contribution to journalArticle

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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 languageEnglish
Article number017306
JournalPhysical Review C - Nuclear Physics
Volume74
Issue number1
DOIs
Publication statusPublished - 2006

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decoupling
neutrons
protons
nuclei
multipoles
closures
isotopes
valence
ground state
cross sections
excitation

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Search for neutron decoupling in O22 via the (d,d'γ) reaction. / Elekes, Z.; Dombrádi, Zs; Aoi, N.; Bishop, S.; Fülöp, Zs; 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.; Nakao, T.; Nikolskii, E. Yu; Ohnishi, T. K.; 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.

In: Physical Review C - Nuclear Physics, Vol. 74, No. 1, 017306, 2006.

Research output: Contribution to journalArticle

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
Elekes, Z. ; Dombrádi, Zs ; Aoi, N. ; Bishop, S. ; Fülöp, Zs ; 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. ; Nakao, T. ; Nikolskii, E. Yu ; Ohnishi, T. K. ; 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. / Search for neutron decoupling in O22 via the (d,d'γ) reaction. In: Physical Review C - Nuclear Physics. 2006 ; Vol. 74, No. 1.
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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.",
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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.

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