ADOPTED LEVELS for 204Au

Authors: C.J. Chiara and F.G. Kondev |  Citation: Nucl. Data Sheets 111,141 (2010) |  Cutoff date: 1-Oct-2009 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=4.04×103 keV SYS(n)= 5.58×103 keV SYS(p)= 8.3×103 keV SYQ(α)= -1.5×103 keV SY
Reference: 2012WA38

References:
  A  204Pt β- decay  B  9Be(208Pb,xγ)

General Comments:

1984Cr01: 204Au produced via 204Hg(n,p) reaction, E(n)=14 MeV; 32-g natural Hg target; delayed γ’s following 204Au β- decay to 204Hg were measured in singles with a Ge detector, and in coin using Ge(Li) and Ge detectors. γ(t) was also measured.

1972Pa06: 204Au produced via 204Hg(n,p) reaction, E(n)=14-15 MeV; 1-10-g natural Hg target; delayed γ’s following 204Au β- decay to 204Hg were measured in singles with a Ge(Li) detector and in coin using NaI(Tl) and Ge(Li) detectors. γ(t) was also measured. β- spectrum measured with plastic scintillator.

2009Mo17: 204Au produced by bombarding a 2.5-g/cm2 9Be target with E(208Pb)=1 GeV/α beam; GSI Fragment Separator; α/Q measured using magnetic rigidity and ToF; two multi sampling ionization chambers for ΔE; fragments were implanted on an active stopper consisting of three DSSD’s each with 16 horizontal and vertical strips. An array of 15 HPGe cluster detectors with 15% total efficiency at 662 keV surrounded the active stopper; measured Eγ, γγ coin and γ(t)

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

Q-value: ΔQ(β-),ΔS(n) uncertainty is 200 keV on each from syst






E(level)
(keV)
XREFJπ(level) T1/2(level)
    0AB (2-) 39.8 s 9 
% β- = 100
  976.6+X B 2.1 µs 3 

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
    0(2-) 39.8 s 9 
% β- = 100
Configuration=((π d3/2)-1(ν p1/2)-1), based on shell model predictions in 1984Cr01 and 1972Pa06. The Nordheim rule (1950No10) favors Jπ=2- assignment.

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