ADOPTED LEVELS for 226Ac
Author: Y. A. Akovali | Citation: Nucl. Data Sheets 77,433 (1996) | Cutoff date: 1-Feb-1996
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=1113 keV 5 | S(n)= 5399 keV 6 | S(p)= 4973 keV 4 | Q(α)= 5536 keV 22 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 230Pa α decay | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0.0 | A | (1) | 29.37 h 12 % β- = 83 3 % ε = 17 3 % α = 6×10-3 2 |
| 5.1 13 | A | ||
| 18.8 10 | A | ||
| 33.3 10 | A | ||
| 45.0 10 | A | ||
| 58.3 17 | A | ||
| 70.3 10 | A | ||
| 77.7 10 | A | ||
| 130.4 17 | A | ||
| 165 4 | A | ||
| 195 3 | A | ||
| 230 4 | A | ||
| 265 3 | A | ||
| 290 4 | A | ||
| 378 3 | A | ||
| 418 4 | A | ||
| 556 6 ? | A | ||
| 589 3 | A | (2-) |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (1) | 29.37 h 12 % β- = 83 3 % ε = 17 3 % α = 6×10-3 2 | α branching was deduced by 1975VaZD; β and ε branchings have been determined from relative γ intensities measured by 1974Va28 in 226Ac β- and ε decays. The measured radium K x-ray intensity (corrected for radium x rays from 226Th α decay) and theoretical εK/ε ratios for the 226Ac ε decay, measured β intensity to 230-keV level in 226Th for the 226Ac β- decay have been used to calculate the ε/β- ratio. ε/β-=62 10/309 17 was obtained by the evaluator. E(level): α branching was deduced by 1975VaZD; β and ε branchings have been determined from relative γ intensities measured by 1974Va28 in 226Ac β- and ε decays. The measured radium K x-ray intensity (corrected for radium x rays from 226Th α decay) and theoretical εK/ε ratios for the 226Ac ε decay, measured β intensity to 230-keV level in 226Th for the 226Ac β- decay have been used to calculate the ε/β- ratio. ε/β-=62 10/309 17 was obtained by the evaluator. |
The superdeformation properties, such as deformation parameters, level energy and potential-well depth, were calculated by 1992Ch20.
Search for a fissioning isomer was carried out by 1972Ku26 via the 226Ra(d,xn) reaction; no SF isomer was observed.
See 1984Ro23 and 1980Ku14 for calculations and discussions on the fission barriers.
For calculation of 5He emission probability, see 1984Po11.
Q-value: Note: Current evaluation has used the following Q record 1117 5 5399 8 4974 4 5536 22 1995Au04