N=16 spherical shell closure in O24

K. Tshoo; Y. Satou; H. Bhang; S. Choi; T. Nakamura; Y. Kondo; S. Deguchi; Y. Kawada; N. Kobayashi; Y. Nakayama; K. N. Tanaka; N. Tanaka; N. Aoi; M. Ishihara; T. Motobayashi; H. Otsu; H. Sakurai; S. Takeuchi; Y. Togano; K. Yoneda; Z. H. Li; F. Delaunay; J. Gibelin; F. M. Marqués; N. A. Orr; T. Honda; M. Matsushita; T. Kobayashi; Y. Miyashita; T. Sumikama; K. Yoshinaga; S. Shimoura; D. Sohler; T. Zheng; Z. X. Cao

doi:10.1103/PhysRevLett.109.022501

N=16 spherical shell closure in O24

K. Tshoo, Y. Satou, H. Bhang, S. Choi, T. Nakamura, Y. Kondo, S. Deguchi, Y. Kawada, N. Kobayashi, Y. Nakayama, K. N. Tanaka, N. Tanaka, N. Aoi, M. Ishihara, T. Motobayashi, H. Otsu, H. Sakurai, S. Takeuchi, Y. Togano, K. YonedaZ. H. Li, F. Delaunay, J. Gibelin, F. M. Marqués, N. A. Orr, T. Honda, M. Matsushita, T. Kobayashi, Y. Miyashita, T. Sumikama, K. Yoshinaga, S. Shimoura, D. Sohler, T. Zheng, Z. X. Cao

SCI - Physics

Research output: Contribution to journal › Article › peer-review

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Abstract

The unbound excited states of the neutron drip-line isotope O24 have been investigated via the O24(p,p ^′)O23+n reaction in inverse kinematics at a beam energy of 62MeV/nucleon. The decay energy spectrum of O*24 was reconstructed from the momenta of O23 and the neutron. The spin parity of the first excited state, observed at E _x=4.65±0. 14MeV, was determined to be Jπ=2 ⁺ from the angular distribution of the cross section. Higher-lying states were also observed. The quadrupole transition parameter β ₂ of the 21+ state was deduced, for the first time, to be 0.15±0.04. The relatively high excitation energy and small β ₂ value are indicative of the N=16 shell closure in O24.

Original language	English
Article number	022501
Journal	Physical review letters
Volume	109
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.109.022501
Publication status	Published - 2012 Jul 12

ASJC Scopus subject areas

Physics and Astronomy(all)

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Tshoo, K., Satou, Y., Bhang, H., Choi, S., Nakamura, T., Kondo, Y., Deguchi, S., Kawada, Y., Kobayashi, N., Nakayama, Y., Tanaka, K. N., Tanaka, N., Aoi, N., Ishihara, M., Motobayashi, T., Otsu, H., Sakurai, H., Takeuchi, S., Togano, Y., ... Cao, Z. X. (2012). N=16 spherical shell closure in O24. Physical review letters, 109(2), [022501]. https://doi.org/10.1103/PhysRevLett.109.022501

Tshoo, K, Satou, Y, Bhang, H, Choi, S, Nakamura, T, Kondo, Y, Deguchi, S, Kawada, Y, Kobayashi, N, Nakayama, Y, Tanaka, KN, Tanaka, N, Aoi, N, Ishihara, M, Motobayashi, T, Otsu, H, Sakurai, H, Takeuchi, S, Togano, Y, Yoneda, K, Li, ZH, Delaunay, F, Gibelin, J, Marqués, FM, Orr, NA, Honda, T, Matsushita, M, Kobayashi, T, Miyashita, Y, Sumikama, T, Yoshinaga, K, Shimoura, S, Sohler, D, Zheng, T & Cao, ZX 2012, 'N=16 spherical shell closure in O24', Physical review letters, vol. 109, no. 2, 022501. https://doi.org/10.1103/PhysRevLett.109.022501

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title = "N=16 spherical shell closure in O24",

abstract = "The unbound excited states of the neutron drip-line isotope O24 have been investigated via the O24(p,p ′)O23+n reaction in inverse kinematics at a beam energy of 62MeV/nucleon. The decay energy spectrum of O*24 was reconstructed from the momenta of O23 and the neutron. The spin parity of the first excited state, observed at E x=4.65±0. 14MeV, was determined to be Jπ=2 + from the angular distribution of the cross section. Higher-lying states were also observed. The quadrupole transition parameter β 2 of the 21+ state was deduced, for the first time, to be 0.15±0.04. The relatively high excitation energy and small β 2 value are indicative of the N=16 shell closure in O24.",

author = "K. Tshoo and Y. Satou and H. Bhang and S. Choi and T. Nakamura and Y. Kondo and S. Deguchi and Y. Kawada and N. Kobayashi and Y. Nakayama and Tanaka, {K. N.} and N. Tanaka and N. Aoi and M. Ishihara and T. Motobayashi and H. Otsu and H. Sakurai and S. Takeuchi and Y. Togano and K. Yoneda and Li, {Z. H.} and F. Delaunay and J. Gibelin and Marqu{\'e}s, {F. M.} and Orr, {N. A.} and T. Honda and M. Matsushita and T. Kobayashi and Y. Miyashita and T. Sumikama and K. Yoshinaga and S. Shimoura and D. Sohler and T. Zheng and Cao, {Z. X.}",

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doi = "10.1103/PhysRevLett.109.022501",

language = "English",

volume = "109",

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T1 - N=16 spherical shell closure in O24

AU - Tshoo, K.

AU - Satou, Y.

AU - Bhang, H.

AU - Choi, S.

AU - Nakamura, T.

AU - Kondo, Y.

AU - Deguchi, S.

AU - Kawada, Y.

AU - Kobayashi, N.

AU - Nakayama, Y.

AU - Tanaka, K. N.

AU - Tanaka, N.

AU - Aoi, N.

AU - Ishihara, M.

AU - Motobayashi, T.

AU - Otsu, H.

AU - Sakurai, H.

AU - Takeuchi, S.

AU - Togano, Y.

AU - Yoneda, K.

AU - Li, Z. H.

AU - Delaunay, F.

AU - Gibelin, J.

AU - Marqués, F. M.

AU - Orr, N. A.

AU - Honda, T.

AU - Matsushita, M.

AU - Kobayashi, T.

AU - Miyashita, Y.

AU - Sumikama, T.

AU - Yoshinaga, K.

AU - Shimoura, S.

AU - Sohler, D.

AU - Zheng, T.

AU - Cao, Z. X.

PY - 2012/7/12

Y1 - 2012/7/12

N2 - The unbound excited states of the neutron drip-line isotope O24 have been investigated via the O24(p,p ′)O23+n reaction in inverse kinematics at a beam energy of 62MeV/nucleon. The decay energy spectrum of O*24 was reconstructed from the momenta of O23 and the neutron. The spin parity of the first excited state, observed at E x=4.65±0. 14MeV, was determined to be Jπ=2 + from the angular distribution of the cross section. Higher-lying states were also observed. The quadrupole transition parameter β 2 of the 21+ state was deduced, for the first time, to be 0.15±0.04. The relatively high excitation energy and small β 2 value are indicative of the N=16 shell closure in O24.

AB - The unbound excited states of the neutron drip-line isotope O24 have been investigated via the O24(p,p ′)O23+n reaction in inverse kinematics at a beam energy of 62MeV/nucleon. The decay energy spectrum of O*24 was reconstructed from the momenta of O23 and the neutron. The spin parity of the first excited state, observed at E x=4.65±0. 14MeV, was determined to be Jπ=2 + from the angular distribution of the cross section. Higher-lying states were also observed. The quadrupole transition parameter β 2 of the 21+ state was deduced, for the first time, to be 0.15±0.04. The relatively high excitation energy and small β 2 value are indicative of the N=16 shell closure in O24.

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JO - Physical Review Letters

JF - Physical Review Letters

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ER -

N=16 spherical shell closure in O24

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