### Abstract

Neutron-deficient americium isotopes [Formula Presented] were produced in the bombardment of multiple thin targets of [Formula Presented] and [Formula Presented] with [Formula Presented] ions. The reaction products were effectively mass-separated using the on-line isotope separator (JAERI-ISOL) coupled to a helium gas-jet transport system. For the first time, the [Formula Presented] transition of [Formula Presented] was observed, and some improved [Formula Presented]-decay data for [Formula Presented] and [Formula Presented] ([Formula Presented]-decay daughter of [Formula Presented]) were accumulated. The [Formula Presented]-particle energies of [Formula Presented] and [Formula Presented] were determined to be [Formula Presented] and [Formula Presented] and their half-lives were [Formula Presented] and [Formula Presented], respectively. Measured [Formula Presented]-decay branching ratios of [Formula Presented] and [Formula Presented] were [Formula Presented] and [Formula Presented], respectively, while the lower limit for [Formula Presented]-decay of [Formula Presented] was deduced to be [Formula Presented]. Hindrance factors and probable assignments of the levels involved in those [Formula Presented] transitions are discussed.

Original language | English |
---|---|

Number of pages | 1 |

Journal | Physical Review C - Nuclear Physics |

Volume | 69 |

Issue number | 1 |

DOIs | |

Publication status | Published - 2004 Jan 1 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Nuclear and High Energy Physics

### Cite this

*Physical Review C - Nuclear Physics*,

*69*(1). https://doi.org/10.1103/PhysRevC.69.014308

**[Formula Presented]-decays of neutron-deficient americium isotopes.** / Sakama, M.; Asai, M.; Tsukada, K.; Ichikawa, S.; Nishinaka, I.; Nagame, Y.; Haba, H.; Goto, S.; Shibata, M.; Kawade, K.; Kojima, Y.; Oura, Y.; Ebihara, Mitsuru; Nakahara, H.

Research output: Contribution to journal › Article

*Physical Review C - Nuclear Physics*, vol. 69, no. 1. https://doi.org/10.1103/PhysRevC.69.014308

}

TY - JOUR

T1 - [Formula Presented]-decays of neutron-deficient americium isotopes

AU - Sakama, M.

AU - Asai, M.

AU - Tsukada, K.

AU - Ichikawa, S.

AU - Nishinaka, I.

AU - Nagame, Y.

AU - Haba, H.

AU - Goto, S.

AU - Shibata, M.

AU - Kawade, K.

AU - Kojima, Y.

AU - Oura, Y.

AU - Ebihara, Mitsuru

AU - Nakahara, H.

PY - 2004/1/1

Y1 - 2004/1/1

N2 - Neutron-deficient americium isotopes [Formula Presented] were produced in the bombardment of multiple thin targets of [Formula Presented] and [Formula Presented] with [Formula Presented] ions. The reaction products were effectively mass-separated using the on-line isotope separator (JAERI-ISOL) coupled to a helium gas-jet transport system. For the first time, the [Formula Presented] transition of [Formula Presented] was observed, and some improved [Formula Presented]-decay data for [Formula Presented] and [Formula Presented] ([Formula Presented]-decay daughter of [Formula Presented]) were accumulated. The [Formula Presented]-particle energies of [Formula Presented] and [Formula Presented] were determined to be [Formula Presented] and [Formula Presented] and their half-lives were [Formula Presented] and [Formula Presented], respectively. Measured [Formula Presented]-decay branching ratios of [Formula Presented] and [Formula Presented] were [Formula Presented] and [Formula Presented], respectively, while the lower limit for [Formula Presented]-decay of [Formula Presented] was deduced to be [Formula Presented]. Hindrance factors and probable assignments of the levels involved in those [Formula Presented] transitions are discussed.

AB - Neutron-deficient americium isotopes [Formula Presented] were produced in the bombardment of multiple thin targets of [Formula Presented] and [Formula Presented] with [Formula Presented] ions. The reaction products were effectively mass-separated using the on-line isotope separator (JAERI-ISOL) coupled to a helium gas-jet transport system. For the first time, the [Formula Presented] transition of [Formula Presented] was observed, and some improved [Formula Presented]-decay data for [Formula Presented] and [Formula Presented] ([Formula Presented]-decay daughter of [Formula Presented]) were accumulated. The [Formula Presented]-particle energies of [Formula Presented] and [Formula Presented] were determined to be [Formula Presented] and [Formula Presented] and their half-lives were [Formula Presented] and [Formula Presented], respectively. Measured [Formula Presented]-decay branching ratios of [Formula Presented] and [Formula Presented] were [Formula Presented] and [Formula Presented], respectively, while the lower limit for [Formula Presented]-decay of [Formula Presented] was deduced to be [Formula Presented]. Hindrance factors and probable assignments of the levels involved in those [Formula Presented] transitions are discussed.

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U2 - 10.1103/PhysRevC.69.014308

DO - 10.1103/PhysRevC.69.014308

M3 - Article

VL - 69

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 1

ER -