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 4S(n)= 8.00×103 keV 3S(p)= 8.2×102 keV 6Q(α)= 6923 keV 4
Reference: 2012WA38

References:
  A  210Ac α decay 

General Comments:

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










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
      0A (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(γ): From 1981Ri04

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
  531+X (10-) 0.7 s 1 
% α = 5 SY
% IT = 95 SY
  531[E3]0.1086B(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

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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+.

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