ADOPTED LEVELS, GAMMAS for 207Fr

Authors: F.G. Kondev, S. Lalkovski |  Citation: Nucl. Data Sheets 112, 707 (2011) |  Cutoff date: 1-Aug-2010 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-6.38×103 keV 6S(n)= 9.67×103 keV 4S(p)= 1018 keV 23Q(α)= 6893 keV 20
Reference: 2012WA38

References:
  A  211Ac α decay  B  181Ta(30Si,4nγ)

General Comments:

SF isomer with T1/2>8 ns was reported by 1969Ru08, but not confirmed by 1970Bj02

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
     0AB 9/2- 14.8 s 1 
% ε = 5 2
% α = 95 2
     
   599.6 5  B (13/2-)     599.6 5 
  100
[E2]
     0
9/2-
  1154.8 7  B (17/2-)     555.2 5 
  100
(E2)
   599.6
(13/2-)
  1808.5 9  B (21/2-)     653.7 5 
  100

  1154.8
(17/2-)
  1885.2 9  B     730.4 5 
  100

  1154.8
(17/2-)

E(level): From a least-squares fit to Eγ

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Weakly collective structure based on the (π h9/2)+1
     0 9/2- 14.8 s 1 
% ε = 5 2
% α = 95 2
     
   599.6 5  (13/2-)     599.6 5 
  100
[E2]
     0
9/2-
  1154.8 7  (17/2-)     555.2 5 
  100
(E2)
   599.6
(13/2-)
  1808.5 9  (21/2-)     653.7 5 
  100

  1154.8
(17/2-)

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     09/2- 14.8 s 1 
% ε = 5 2
% α = 95 2
μ=+3.89 8 (1985Co24,2005St24), Q=-0.16 5 (1985Co24,2005St24)
Δ<r2>=-0.21794 16 relative to 212Fr (1987Co19, supersedes 1985Co24). The uncertainty is statistical only. Uncertainty in density and calibration add a few percent (1987Co19).
E(level): Δ<r2>=-0.21794 16 relative to 212Fr (1987Co19, supersedes 1985Co24). The uncertainty is statistical only. Uncertainty in density and calibration add a few percent (1987Co19). Weakly collective structure based on the (π h9/2)+1.
   599.6(13/2-)   E(level): Weakly collective structure based on the (π h9/2)+1.
  1154.8(17/2-)   E(level): Weakly collective structure based on the (π h9/2)+1.
  1808.5(21/2-)   E(level): Weakly collective structure based on the (π h9/2)+1.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   599.6   599.6M(γ): A2=-0.04 4 (2008Ha39). The A2 value is inconsistent with the proposed stretched E2 assignment in 2008Ha39, where a possible contamination from a transition of similar energy in 204At is suggested
  1154.8   555.2M(γ): A2=+0.67 12 (2008Ha39).

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