ADOPTED LEVELS, GAMMAS for 249Fm
Author: Khalifeh Abusaleem | Citation: Nucl. Data Sheets 112, 2129 (2011) | Cutoff date: 31-Dec-2010
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-3.71×103 keV SY | S(n)= 6450 keV 11 | S(p)= 4.07×103 keV SY | Q(α)= 7709 keV 6 | ||
Reference: 2012WA38 |
References: | |||
A | 253No α decay:1.62 M |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0 | A | (7/2+) | 2.6 m 7 % ε = 67 9 % α = 33 9 | |||||
58.0 3 | A | 9/2+ | 58 | 100 | 0 | (7/2+) | ||
128.6 4 | A | 11/2+ | 71 129 | | E2 | 58.0 0 | 9/2+ (7/2+) | |
146? | A | |||||||
209.5 5 | A | 5/2+ | 209.5 5 | 100 | M1 | 0 | (7/2+) | |
254 17 | A | |||||||
279.80 19 | A | 9/2- | 151.23 31 221.83 19 279.79 19 | 18 1 100 48 2 | E1 E1 E1 | 128.6 58.0 0 | 11/2+ 9/2+ (7/2+) | |
669 3 | A | (7/2-) | 669 3 | 100 | 0 | (7/2+) |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - 7/2[624] | |||||||
0 | (7/2+) | 2.6 m 7 % ε = 67 9 % α = 33 9 | |||||
58.0 3 | 9/2+ | 58 | 100 | 0 | (7/2+) | ||
128.6 4 | 11/2+ | 71 129 | | E2 | 58.0 0 | 9/2+ (7/2+) |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
128.6 | 11/2+ | 129 | E2 | 8.25 | α=8.25 12, α(L)=5.92 9, α(M)=1.702 24, α(N)=0.484 7, α(O)=0.1224 18, α(P)=0.0197 3, α(Q)=9.29×10-5 13, α(N+)=0.626 9 | |
209.5 | 5/2+ | 209.5 5 | M1 | 5.60 | α=5.60 9, α(K)=2.2 21, α(L)=0.81 12, α(M)=0.212 17, α(N)=0.060 5, α(O)=0.0155 14, α(P)=0.0028 5, α(Q)=0.00010 9, α(N+)=0.078 6 | |
279.80 | 9/2- | 151.23 31 | E1 | 0.213 | α=0.213 4, α(K)=0.1577 25, α(L)=0.0411 7, α(M)=0.01021 17, α(N)=0.00283 5, α(O)=0.000724 12, α(P)=0.0001250 20, α(Q)=4.49×10-6 7, α(N+)=0.00368 6 | |
9/2- | 221.83 19 | E1 | 0.0913 | α=0.0913 14, α(K)=0.0696 11, α(L)=0.01626 25, α(M)=0.00402 6, α(N)=0.001115 17, α(O)=0.000288 5, α(P)=5.12×10-5 8, α(Q)=2.05E-6 3, α(N+)=0.001456 22 | ||
9/2- | 279.79 19 | E1 | 0.0555 | α=0.0555 8, α(K)=0.0429 7, α(L)=0.00953 14, α(M)=0.00235 4, α(N)=0.000652 10, α(O)=0.0001687 25, α(P)=3.05×10-5 5, α(Q)=1.294E-6 19, α(N+)=0.000852 13 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0 | (7/2+) | 2.6 m 7 % ε = 67 9 % α = 33 9 | Calculated: T1/2(ε+β+)=39 s, T1/2(α)=6×104 s (1997Mo25). E(level): 7/2[624]. |
58.0 | 9/2+ | E(level): 7/2[624]. | |
128.6 | 11/2+ | E(level): 7/2[624]. | |
146 | May consist of an unresolved doublet. | ||
669 | (7/2-) | Configuration=7/2[743]. |
E(level) | E(gamma) | Comments |
Calculations, compilations: 2005Pa73
Half-life: 2009Sa25
Q(α): 2008Do12
Electromagnetic properties: 2006Sh19
Favored α decays: 1993Bu09
Ground state properties: 2006Sh19, 1997Mo25, 1995Mo29
Single-particle Nilsson levels: 1994Cw02
1994Cw02 calculate the following single-particle level sequence: g.s. 7/2[624], 0.07 MeV 9/2[734], 0.12 MeV 5/2[622]
Calculations of 2006Sh19 give: D0=0.0128, Q2=983, Q3=1868 for the g.s. transition to the states of parity doublet band.
Q-value: Note: Current evaluation has used the following Q record
Q-value: -3706 syst 6358 syst 3970 syst 7808 syst 2009AuZZ
Q-value: Estimated ΔQ(β-)=224, ΔS(p)=53, ΔQ(α)=101
Q-value: Q(β-)=-3700 300, S(n)=6358 100, S(p)=3970 110, Q(α)=7810 100 (2003Au03)