Anomaly of [Formula Presented] shell closure in neutron-rich Be and B isotopes studied via delayed neutron emitting [Formula Presented] decay

N. Aoi; K. Yoneda; E. Ideguchi; T. Kishida; T. Nakamura; M. Notani; H. Sakurai; T. Teranishi; Y. Watanabe; H. Wu; A. Yoshida; H. Miyatake; Y. Yamamoto; H. Ogawa; S. S. Yamamoto; M. Ishihara

doi:10.1103/PhysRevC.66.014301

Anomaly of [Formula Presented] shell closure in neutron-rich Be and B isotopes studied via delayed neutron emitting [Formula Presented] decay

N. Aoi, K. Yoneda, E. Ideguchi, T. Kishida, T. Nakamura, M. Notani, H. Sakurai, T. Teranishi, Y. Watanabe, H. Wu, A. Yoshida, H. Miyatake, Y. Yamamoto, H. Ogawa, S. S. Yamamoto, M. Ishihara

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

Abstract

We investigated the [Formula Presented] decay of the neutron drip line nucleus [Formula Presented] by means of double and triple coincidence measurements of [Formula Presented] rays, delayed neutrons, and [Formula Presented] rays. The decay sequences were established and new values of the half-life and branching ratios were obtained. The decay scheme obtained is characterized by a single dominant branch leading to a [Formula Presented] state in [Formula Presented] with a branching ratio of [Formula Presented] which subsequently emits a delayed neutron with an energy of [Formula Presented] The excitation energy and width of the [Formula Presented] state were determined to be [Formula Presented] and [Formula Presented] respectively. The excitation energy and width of this level as well as the [Formula Presented] value were treated in terms of a simple shell model and found to be strongly related to the [Formula Presented] shell gap quenching [Formula Presented] and [Formula Presented].

Original language	English
Pages (from-to)	11
Number of pages	1
Journal	Physical Review C - Nuclear Physics
Volume	66
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.66.014301
Publication status	Published - 2002
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1103/PhysRevC.66.014301

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Aoi, N., Yoneda, K., Ideguchi, E., Kishida, T., Nakamura, T., Notani, M., Sakurai, H., Teranishi, T., Watanabe, Y., Wu, H., Yoshida, A., Miyatake, H., Yamamoto, Y., Ogawa, H., Yamamoto, S. S., & Ishihara, M. (2002). Anomaly of [Formula Presented] shell closure in neutron-rich Be and B isotopes studied via delayed neutron emitting [Formula Presented] decay. Physical Review C - Nuclear Physics, 66(1), 11. https://doi.org/10.1103/PhysRevC.66.014301

Aoi, N, Yoneda, K, Ideguchi, E, Kishida, T, Nakamura, T, Notani, M, Sakurai, H, Teranishi, T, Watanabe, Y, Wu, H, Yoshida, A, Miyatake, H, Yamamoto, Y, Ogawa, H, Yamamoto, SS & Ishihara, M 2002, 'Anomaly of [Formula Presented] shell closure in neutron-rich Be and B isotopes studied via delayed neutron emitting [Formula Presented] decay', Physical Review C - Nuclear Physics, vol. 66, no. 1, pp. 11. https://doi.org/10.1103/PhysRevC.66.014301

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title = "Anomaly of [Formula Presented] shell closure in neutron-rich Be and B isotopes studied via delayed neutron emitting [Formula Presented] decay",

abstract = "We investigated the [Formula Presented] decay of the neutron drip line nucleus [Formula Presented] by means of double and triple coincidence measurements of [Formula Presented] rays, delayed neutrons, and [Formula Presented] rays. The decay sequences were established and new values of the half-life and branching ratios were obtained. The decay scheme obtained is characterized by a single dominant branch leading to a [Formula Presented] state in [Formula Presented] with a branching ratio of [Formula Presented] which subsequently emits a delayed neutron with an energy of [Formula Presented] The excitation energy and width of the [Formula Presented] state were determined to be [Formula Presented] and [Formula Presented] respectively. The excitation energy and width of this level as well as the [Formula Presented] value were treated in terms of a simple shell model and found to be strongly related to the [Formula Presented] shell gap quenching [Formula Presented] and [Formula Presented].",

author = "N. Aoi and K. Yoneda and E. Ideguchi and T. Kishida and T. Nakamura and M. Notani and H. Sakurai and T. Teranishi and Y. Watanabe and H. Wu and A. Yoshida and H. Miyatake and Y. Yamamoto and H. Ogawa and Yamamoto, {S. S.} and M. Ishihara",

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doi = "10.1103/PhysRevC.66.014301",

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AU - Aoi, N.

AU - Yoneda, K.

AU - Ideguchi, E.

AU - Kishida, T.

AU - Nakamura, T.

AU - Notani, M.

AU - Sakurai, H.

AU - Teranishi, T.

AU - Watanabe, Y.

AU - Wu, H.

AU - Yoshida, A.

AU - Miyatake, H.

AU - Yamamoto, Y.

AU - Ogawa, H.

AU - Yamamoto, S. S.

AU - Ishihara, M.

PY - 2002

Y1 - 2002

N2 - We investigated the [Formula Presented] decay of the neutron drip line nucleus [Formula Presented] by means of double and triple coincidence measurements of [Formula Presented] rays, delayed neutrons, and [Formula Presented] rays. The decay sequences were established and new values of the half-life and branching ratios were obtained. The decay scheme obtained is characterized by a single dominant branch leading to a [Formula Presented] state in [Formula Presented] with a branching ratio of [Formula Presented] which subsequently emits a delayed neutron with an energy of [Formula Presented] The excitation energy and width of the [Formula Presented] state were determined to be [Formula Presented] and [Formula Presented] respectively. The excitation energy and width of this level as well as the [Formula Presented] value were treated in terms of a simple shell model and found to be strongly related to the [Formula Presented] shell gap quenching [Formula Presented] and [Formula Presented].

AB - We investigated the [Formula Presented] decay of the neutron drip line nucleus [Formula Presented] by means of double and triple coincidence measurements of [Formula Presented] rays, delayed neutrons, and [Formula Presented] rays. The decay sequences were established and new values of the half-life and branching ratios were obtained. The decay scheme obtained is characterized by a single dominant branch leading to a [Formula Presented] state in [Formula Presented] with a branching ratio of [Formula Presented] which subsequently emits a delayed neutron with an energy of [Formula Presented] The excitation energy and width of the [Formula Presented] state were determined to be [Formula Presented] and [Formula Presented] respectively. The excitation energy and width of this level as well as the [Formula Presented] value were treated in terms of a simple shell model and found to be strongly related to the [Formula Presented] shell gap quenching [Formula Presented] and [Formula Presented].

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Anomaly of [Formula Presented] shell closure in neutron-rich Be and B isotopes studied via delayed neutron emitting [Formula Presented] decay

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