ADOPTED LEVELS, GAMMAS for 206Fr
Author: F.G. Kondev | Citation: Nucl. Data Sheets 109, 1527 (2008) | Cutoff date: 31-Jan-2008
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-4.81×103 keV 4 | S(n)= 8.00×103 keV 3 | S(p)= 8.2×102 keV 6 | Q(α)= 6923 keV 4 | ||
Reference: 2012WA38 |
References: | |||
A | 210Ac α decay |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0 | A | (2+,3+) | ≈ 16 s % ε ≈ 16 % α ≈ 84 | |||||
0.0+X | (7+) | ≈ 16 s % α ≈ 84 % ε ≈ 16 | ||||||
531+X | (10-) | 0.7 s 1 % α = 5 SY % IT = 95 SY | 531 | 100 | [E3] | 0.0+X | (7+) |
Jπ(level): From systematics in neighboring nuclei, including the corresponding decays within the 206Fr-202At-{+198Bi decay chain
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
531+X | (10-) | 0.7 s 1 % α = 5 SY % IT = 95 SY | 531 | [E3] | 0.1086 | B(E3)(W.u.)=5.2E-5 8, α=0.1086, α(K)=0.0536 8, α(L)=0.0406 6, α(M)=0.01081 16, α(N)=0.00285 4, α(O)=0.000608 9, α(P)=8.59E-5 12, α(Q)=1.779E-6 25, α(N+)=0.00355 5 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0 | (2+,3+) | ≈ 16 s % ε ≈ 16 % α ≈ 84 | Eα=6792 keV 5 (1992Hu04), a doublet with Eα depopulating the (7+) state. Others: 6790 keV 5 (1981Ri04), 6785 keV 5 (1974Ho27), 6792 keV 5 (1967Va20), 6.92 MeV 2 (1964Gr04) and 6.74 MeV (1961Gr42). |
0.0+X | (7+) | ≈ 16 s % α ≈ 84 % ε ≈ 16 | Configuration=((π h9/2)+1(ν f5/2)-1)7+. |
531+X | (10-) | 0.7 s 1 % α = 5 SY % IT = 95 SY | Configuration=((π h9/2)+1(ν i13/2)-1)10+. |
206Fr was produced in Th(p,spall) (1974Ho27), 197Au(16O,7N) (1967Va20, 1964Gr04, 1961Gr42), Ir(20Ne,X) (1981Ri04,1981Ri02,1992Hu04) and 181Ta(32S,7N) (1992Hu04) reactions. The on-line mass separator was used in the work of 1974Ho27, 1981Ri04, 1981Ri02 and 1992Hu04. The existence of three a decaying states was introduced in 1992Hu04 and this interpretation is adopted in the present evaluation
Q-value: Note: Current evaluation has used the following Q record -4810 30 8004 29 -820 60 6923 4 2003Au03