ADOPTED LEVELS for 250Es
Author: Y. Akovali | Citation: Nucl. Data Sheets 94,131 (2001) | Cutoff date: 1-Aug-2001
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-8.5×102 keV SY | S(n)= 6.02×103 keV SY | S(p)= 3.79×103 keV SY | Q(α)= 6.83×103 keV SY | ||
Reference: 2012WA38 |
E(level) (keV) | Jπ(level) | T1/2(level) |
0.0 | (6+) | 8.6 h 1 % ε > 97 % α < 3 |
0.0+X | 1(-) | 2.22 h 5 % ε ≤ 100 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | (6+) | 8.6 h 1 % ε > 97 % α < 3 | In analogy to 245Pu, 247Cm and 249Cf, the 155Th odd neutron probably is in the n 9/2[734] state; analogy to 249Es suggests p 3/2[521] orbital, analogy to 251Es, 253Es suggests p 7/2[633] for the 99Th proton. The most probable assignment is, therefore, 6+,(p 3/2[521],n 9/2[734]). E(level): In analogy to 245Pu, 247Cm and 249Cf, the 155Th odd neutron probably is in the n 9/2[734] state; analogy to 249Es suggests p 3/2[521] orbital, analogy to 251Es, 253Es suggests p 7/2[633] for the 99Th proton. The most probable assignment is, therefore, 6+,(p 3/2[521],n 9/2[734]). |
0.0+X | 1(-) | 2.22 h 5 % ε ≤ 100 | Only the ε decay was studied; no α’s were observed. E(level): Only the ε decay was studied; no α’s were observed. |
For calculations of fission barrier, see for example, 1980Ku14 and 1991Os05.
Q-value: Note: Current evaluation has used the following Q record -801 syst 5976 syst 3742 syst 6878 syst 1995Au04