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 SY | S(n)= 5.58×103 keV SY | S(p)= 8.3×103 keV SY | Q(α)= -1.5×103 keV SY | ||
| Reference: 2012WA38 |
| References: | |||
| A | 204Pt β- decay | B | 9Be(208Pb,xγ) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0 | AB | (2-) | 39.8 s 9 % β- = 100 |
| 976.6+X | B | 2.1 µs 3 |
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. |
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 3940 syst 5678 syst 2003Au03
Q-value: ΔQ(β-),ΔS(n) uncertainty is 200 keV on each from syst