ADOPTED LEVELS, GAMMAS for 168Re
Author: Coral M. Baglin | Citation: Nucl. Data Sheets 111, 1807 (2010) | Cutoff date: 15-Jun-2010
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-5.81×103 keV 4 | S(n)= 9.02×103 keV SY | S(p)= 9.8×102 keV 4 | Q(α)= 5063 keV 13 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 172Ir α decay (4.4 S) | B | 172Ir α decay (2.19 S) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | AB | (7+) | 4.4 s 1 % ε ≈ 100 % α ≈ 5×10-3 | |||||
| 89.7 4 | A | 89.7 4 | 100 | 0.0 | (7+) | |||
| 162.1 2 | B | (8+) | 162.1 2 | 100 | M1+E2 | 0.0 | (7+) | |
| 226.0 6 | A | 136.3 4 | | 89.7 | ||||
| 349.2 6 | A | (3) | 123.2 2 | 100 | (E1) | 226.0 | ||
E(level): From Eγ.
Jπ(level): Note that these values arise primarily from the coupling of expected low-lying p and n orbitals to give likely configurations for the isomeric state(s) in both 168Re and the 172Ir α-decay parent; consequently, they are highly tentative.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
| 162.1 | (8+) | 162.1 2 | M1+E2 | 0.99 16 | 0.99 | α=0.99 6 | |
| 349.2 | (3) | 123.2 2 | (E1) | 0.224 | α=0.224 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (7+) | 4.4 s 1 % ε ≈ 100 % α ≈ 5×10-3 | %α: deduced from Iα/Iγ(199.3γ in 168W) and ε decay scheme for 168Re (1992Me10). E(level): %α: deduced from Iα/Iγ(199.3γ in 168W) and ε decay scheme for 168Re (1992Me10). |
| 89.7 | E(level): E may differ from value shown because order of 90γ-123γ-136γ cascade has not been established. | ||
| 226.0 | E(level): E may differ from value shown because order of 90γ-123γ-136γ cascade has not been established. |
| E(level) | E(gamma) | Comments |
Identification: comparison of 141Pr(32S,xn) excitation functions, producing known tungsten isotopes, with 141Pr(32S,pxn) excitation functions, producing new and established rhenium isotopes; presence of Ta x rays in α-γ coincidence spectra (1992Me10). Earlier assignments of various α groups to one or more isomers of 168Re (1978Ca11,1978Sc26,1982De11,1984Sc06) are apparently incorrect.
Levels: ε decay from 168Os to 168Re is expected (57% branch) but has not yet been observed.
Q-value: Note: Current evaluation has used the following Q record -5800 30 9030 SY1000 40 5063 13 2003Au03,2009AuZZ
Q-value: ΔS(n)=60 (2003Au03,2009AuZZ).