ADOPTED LEVELS for 189Ta
Authors: T.D. Johnson, Balraj Singh | Citation: Nucl. Data Sheets 142, 1 (2017) | Cutoff date: 15-Apr-2017
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=3790 keV SY | S(n)= 6290 keV SY | S(p)= 8240 keV SY | Q(α)= -370 keV SY | ||
| Reference: 2017WA10 |
| References: | |||
| A | 189Ta IT decay (0.58 μs) | ||
| E(level) (keV) | XREF | T1/2(level) |
| 0 | % β- = 100 | |
| 0+X | A | 0.58 µs 22 % IT = 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | % β- = 100 | While no decay mode has been experimentally observed, evaluators assign %β-=100 by inference, as β- is the only decay mode energetically possible. | |
| 0+X | 0.58 µs 22 % IT = 100 | 153.9-, 283.7-, 342.5-, 388.7-, and 481.6-keV gamma rays deexcite this isomer (2011St21), but the decay scheme is unknown. 2009Al30 report several additional weak γ rays of 57, 83, 134, 199 and 246 keV associated with the decay of the isomer. E(level): 153.9-, 283.7-, 342.5-, 388.7-, and 481.6-keV gamma rays deexcite this isomer (2011St21), but the decay scheme is unknown. 2009Al30 report several additional weak γ rays of 57, 83, 134, 199 and 246 keV associated with the decay of the isomer. |
1999Be63: 189Ta produced and identified in projectile fission of 197Au impinging on 9Be target at 950 MeV/nucleon using FRS fragment separator at GSI facility. Determined production cross section to be 10 nb.
2000PoZY: produced by projectile fragmentation of 208Pb impinging on a 1.6 g/cm2 9Be target at 1 GeV/nucleon, fragment separator FRS
Q-value: Estimated uncertainties (2017Wa10): 200 for Q(β-) and S(n), 360 for S(p) and Q(α)
Q-value: S(2n)=11080 200, S(2p)=18830 450 (syst,2017Wa10).