Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 31-AUG-2022 

Authors: Balraj Singh and Michael Birch |  Citation: ENSDF |  Cutoff date: 15-MAY-2011 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=5850 keV SYS(n)= 4520 keV SYS(p)= 8690 keV SYQ(α)= 1310 keV SY
Reference: 2021WA16

General Comments:

2010Al24: 207Au nuclide identified in 9Be(238U,X) reaction with a beam energy of 1 GeV/nucleon produced by the SIS synchrotron at GSI facility. Target=2500 mg/cm2. The fragment residues were analyzed with the high resolving power magnetic spectrometer Fragment separator (FRS). The identification of nuclei was made on the basis of magnetic rigidity, velocity, time-of-flight, energy loss and atomic number of the fragments using two plastic scintillators and two multisampling ionization chambers. The FRS magnet was tuned to center on 210Au, 216Pb, 219Pb, 227At and 229At nuclei along the central trajectory of FRS. Unambiguous identification of nuclides required the separation of different charge states of the nuclei passing through the FRS. At 1 GeV/nucleon incident energy of 238U, fraction of fully stripped 226Po nuclei was about 89%. Through the measurement of difference in magnetic rigidity in the two sections of the FRS and the difference in energy loss in the two ionization chambers, the charge state of the transmitted nuclei was determined, especially, that of the singly charged (hydrogen-like) nuclei which preserved their charge in the current experimental setup. Measured production cross sections with 10% statistical and 20% systematic uncertainties Criterion established in 2010Al24 for acceptance of identification of a new nuclide: 1. number of events should be compatible with the corresponding mass and atomic number located in the expected range of positions at both image planes of the FRS spectrometer; 2. number of events should be compatible with >95% probability that at least one of the counts does not correspond to a charge-state contaminant. Comparisons of measured σ with model predictions using the computer codes COFRA and EPAX.

2017Ca12: production of 207Au in 9Be(238U,X),E=1 GeV/nucleon using FRS separator and segmented silicon detectors (SIMBA) at UNILAC-GSI facility.

Theoretical calculations:

2021Ku17: calculated shape evolution, quadrupole deformation parameter, electric quadrupole moment, single-particle energy levels, binding energy, nuclear charge radius, neutron and proton rms radii, and neutron skin thickness using Hartree-Fock-Bogoliubov Model.

2003Fa08: calculated Q values, half-life, β-n probability, logft, first-forbidden to total ratio for the decay using spherical QRPA with several interactions.

Q-value: Estimated uncertainties (2021Wa16): 300 for Q(β-), 420 for S(n) and S(p), 500 for Q(α).

Q-value: Q(β-n)=2230 300, S(2n)=8210 360, S(2p)=19620 500 (syst, 2021Wa16)

  0 > 300 ns
% β- = 100
% β-n = ?

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Additional Level Data and Comments:

  0 > 300 ns
% β- = 100
% β-n = ?
Only the β- decay is expected, followed possibly by β-n decay from theoretical T1/2(β)=23.4 s, T1/2(α)>1020 s (2019Mo01), thus 100% β- decay is assigned by inference.
E(level): Only the β- decay is expected, followed possibly by β-n decay from theoretical T1/2(β)=23.4 s, T1/2(α)>1020 s (2019Mo01), thus 100% β- decay is assigned by inference.

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