### 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 |
---|---|

Number of pages | 1 |

Journal | Physical Review C - Nuclear Physics |

Volume | 66 |

Issue number | 1 |

DOIs | |

Publication status | Published - Jan 1 2002 |

Externally published | Yes |

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### All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics

### Cite this

*Physical Review C - Nuclear Physics*,

*66*(1). https://doi.org/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.** / Aoi, N.; Yoneda, K.; Ideguchi, E.; Kishida, T.; Nakamura, T.; Notani, M.; Sakurai, H.; Teranishi, Takashi; Watanabe, Y.; Wu, H.; Yoshida, A.; Miyatake, H.; Yamamoto, Y.; Ogawa, H.; Yamamoto, S. S.; Ishihara, M.

Research output: Contribution to journal › Article

*Physical Review C - Nuclear Physics*, vol. 66, no. 1. https://doi.org/10.1103/PhysRevC.66.014301

}

TY - JOUR

T1 - Anomaly of [Formula Presented] shell closure in neutron-rich Be and B isotopes studied via delayed neutron emitting [Formula Presented] decay

AU - Aoi, N.

AU - Yoneda, K.

AU - Ideguchi, E.

AU - Kishida, T.

AU - Nakamura, T.

AU - Notani, M.

AU - Sakurai, H.

AU - Teranishi, Takashi

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 - 2002/1/1

Y1 - 2002/1/1

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].

UR - http://www.scopus.com/inward/record.url?scp=85035299796&partnerID=8YFLogxK

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U2 - 10.1103/PhysRevC.66.014301

DO - 10.1103/PhysRevC.66.014301

M3 - Article

AN - SCOPUS:85035299796

VL - 66

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 1

ER -