ADOPTED LEVELS, GAMMAS for 208Fr

Author: M. J. Martin |  Citation: Nucl. Data Sheets 108,1583 (2007) |  Cutoff date: 1-Jun-2007 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-4381 keV 20S(n)= 7893 keV 21S(p)= 1320 keV 15Q(α)= 6785 keV 24
Reference: 2012WA38

References:
  A  212Ac α decay  B  9Be(238U,X)

General Comments:

No SF isomers with 2 ns|<T1/2|<2000 s (σ>0.07 μb) observed from search for fission fragments following bombardment of 197Au with 85- to 165-MeV 16O (1970Bj02).

Q-value: Note: Current evaluation has used the following Q record









E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
M(γ)Final Levels
    0.0AB 7+ 59.1 s 3 
% ε = 11 3
% α = 89 3
    
  633 B (9+)     633

    0.0
7+
  827 B (10-) ≈ 200 ns   194
[E1]
  633
(9+)

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
    0.07+ 59.1 s 3 
% ε = 11 3
% α = 89 3
μ=4.75 10 (1985Co24,1986Ek02,2005St24), Q=0.00 4 (1985Co24,2005St24)
Isotope shift: Δ<r2>=-0.20804 12 relative to 212Fr (1987Co19). This replaces the earlier result by the same authors (1985Co24).

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