ADOPTED LEVELS, GAMMAS for 251No
Author: C. Morse | Citation: Nucl. Data Sheets 189, 111 (2023) | Cutoff date: 23-Sep-2022
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-4981 keV SY | S(n)= 6788 keV SY | S(p)= 2839 keV SY | Q(α)= 8752 keV 4 | ||
| Reference: 2021Wa16 |
| References: | |||
| A | 255Rf α decay | B | 206Pb(48Ca,3n) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0 | AB | (7/2+) | 0.80 s 1 % α = 91 +9-22 % SF = 0.0014 +31-12 % ε > 0 | |||||
| 60.3 3 S | AB | (9/2+) | 60.3 3 S | 100 | 0 | (7/2+) | ||
| 106 6 | B | (1/2+) | 1.00 s 4 % α ≈ 100 | |||||
| 203.6 2 | AB | (9/2-) | 143.3 2 203.6 2 | 100 12 96 12 | E1 E1 | 60.3 0 | (9/2+) (7/2+) | |
| 917.2 5 ? | B | (7/2+) | 713.6 5 ? | 100 | 203.6 | (9/2-) | ||
| ≥1699.2? | B | ≈ 2 µs | ||||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - 7/2+[624] | |||||||
| 0 | (7/2+) | 0.80 s 1 % α = 91 +9-22 % SF = 0.0014 +31-12 % ε > 0 | |||||
| 60.3 3 S | (9/2+) | 60.3 3 S | 100 | 0 | (7/2+) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 203.6 | (9/2-) | 143.3 2 | E1 | 0.0669 | α=0.0669, α(L)=0.0499 8, α(M)=0.01248 18, α(N)=0.00348 5, α(O)=0.000905 13, α(P)=0.0001546 23, α(Q)=5.14×10-6 8 | |
| (9/2-) | 203.6 2 | E1 | 0.1143 | α=0.1143, α(K)=0.0857 13, α(L)=0.0213 3, α(M)=0.00530 8, α(N)=0.001482 21, α(O)=0.000388 6, α(P)=6.84×10-5 10, α(Q)=2.52E-6 4 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | (7/2+) | 0.80 s 1 % α = 91 +9-22 % SF = 0.0014 +31-12 % ε > 0 | CONF=7/2+[624] (2006He27) E(level): 7/2+[624]. |
| 60.3 | (9/2+) | E(level): 7/2+[624]. | |
| 106 | (1/2+) | 1.00 s 4 % α ≈ 100 | CONF=1/2+[631] (2006He27) J: Based on favored α decay to (1/2-) state in 247Fm. |
| E(level) | E(gamma) | Comments |
| 60.3 | 60.3 | E(γ): From difference of parallel γ-rays depopulating excited state in 255Rf α decay. |