**ADOPTED LEVELS, GAMMAS for ^{81}Ga**

__Author:__ Coral M. Baglin **|** __Citation:__ Nucl. Data Sheets 109, 2257 (2008) **|** __Cutoff date:__ 15-Aug-2008

Full ENSDF file | Adopted Levels (PDF version)

Q(β-)=8664 keV 4 | S(n)= 6476 keV 5 | S(p)= 13268 keV 5 | Q(α)= -1.154×10^{4} keV SY | ||

Reference: 2012WA38 |

References: | |||

A | ^{81}Zn β^{-} decay | B | ^{238}U(^{82}Se,xγ), ^{192}Os(^{82}Se,xγ) |

E(level) (keV) | XREF | J^{π}(level) | T_{1/2}(level) | E(γ) (keV) | I(γ) | Final Levels | |

0 | AB | (5/2-) | 1.217 s 5 % β ^{-} = 100 % β ^{-}n = 11.9 7 | ||||

351.1 | A | (3/2-) | 351.1 | 100 | 0 | (5/2-) | |

802.8 | A | (3/2-) | 451.7 | 100 | 351.1 | (3/2-) | |

1236 | B | (9/2)- | 1236 | 100 | 0 | (5/2-) | |

1621.6? | A | 1621.6 | 100 | 0 | (5/2-) |

E(level): From Eγ.

J^{π}(level): Shell model calculations including 1f_{5/2}, 2p_{3/2}, 2p_{1/2} and 1g_{9/2} active proton orbitals and an inert ^{78}Ni core (2007VeZZ) predict a 5/2- g.s., 3/2- levels at 299 keV and 730 keV, and a 9/2-level at 1374 keV; the latter is tentatively associated with the observed level at 1236 keV (2007De37) and the second 3/2- level with the observed 803-keV level (2007VeZZ). α more extensive series of calculations (2007Ve08) employing different sets of single-particle energies and two-body matrix elements predict somewhat different level energies but lead the authors to conclude that the π 1f_{5/2} single-particle state lies below the π 2p_{3/2} state for very neutron-rich nuclei such as ^{81}Ga; the reverse is true for ^{83}Ga.

E(γ): From ^{81}Zn β^{-} decay, except as noted. Uncertainties unstated by authors.

__Additional Level Data and Comments__:

E(level) | J^{π}(level) | T_{1/2}(level) | Comments |

0 | (5/2-) | 1.217 s 5 % β ^{-} = 100 % β ^{-}n = 11.9 7 | %β^{-}n is from simultaneous measurement of n-emission rate and β^{-} decay rate. Average of: 10.6% 8 (1986Wa17) (4% statistical and 7% systematic uncertainty); 12.2% 10 (12.0% 9 datum of 1980Lu04 (75% of uncertainty systematic), revised to value recommended in 1984Ma39 (based on overall consistency of data from different laboratories)); 12.9% 8 (1993Ru01).E(level): %β ^{-}n is from simultaneous measurement of n-emission rate and β^{-} decay rate. Average of: 10.6% 8 (1986Wa17) (4% statistical and 7% systematic uncertainty); 12.2% 10 (12.0% 9 datum of 1980Lu04 (75% of uncertainty systematic), revised to value recommended in 1984Ma39 (based on overall consistency of data from different laboratories)); 12.9% 8 (1993Ru01). |

E(level) | E(gamma) | Comments |

1236 | 1236 | E(γ): from ^{238}U(^{82}Se,Xγ), ^{192}Os(^{82}Se,Xγ). |

All measurements utilized mass-separated fission products.

Q-value: Note: Current evaluation has used the following Q record

Q-value: Q(β

^{-}), S(n), S(p) from mass data for^{80}Zn,^{80}Ga,^{81}Ga and^{81}Ge from 2008Ha23 (cf. 8320150, 6920230, 13430260, respectively, in 2003Au03).Q-value: Q(β

^{-}n)=3460190(2003Au03).Q-value: ΔQ(α)=590 (2003Au03).