ADOPTED LEVELS, GAMMAS for 184Tl

Author: Coral M. Baglin |  Citation: Nucl. Data Sheets 111,275 (2010) |  Cutoff date: 1-Oct-2009 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-5822 keV 24S(n)= 8357 keV 23S(p)= 358 keV 22Q(α)= 6.30×103 keV 3
Reference: 2012WA38

References:
  A  188Bi α decay (265 MS)  B  188Bi α decay (60 MS)

General Comments:

The odd-odd 186Tl-198Tl isotopes all exhibit isomer pairs. 184Tl ε decay apparently populates both high and low spin states (Jπ=2+, 4+, 6+ and 8+). Mutually consistent values of half-life have been reported for both α and ε decay, suggesting either that the isomer and ground state have comparable half-lives, or that an unidentified isomeric transition populates the ground state which is in equilibrium. See 1990Va15 for calculation of level energies and configuration for the heavier odd-odd Tl isotopes.

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
      0   10.1 s 5 
% ε = 97.9 7
% α = 2.1 7
     
      0.0+XA  (7+)        
      0.0+Y B (2-)        
     70.6+X 5 A  (6+)      70.5 5 
  100
M1
      0.0+X
(7+)
    117.5+Y 5  B (3+)     117.5 5 
  100
E1
      0.0+Y
(2-)
    216.5+Y 7  B (2-,3-,4-)      99.0 5 
  100
(E1)
    117.5+Y
(3+)
    319.8+X 8 A      249 1 
  320 1 
 
 


     70.6+X
      0.0+X
(6+)
(7+)
  500+X 7 A  (10-)        

E(level): From least-squares fit to Eγ, except as noted

E(γ): From 188Bi α decay (265 ms), except as noted.

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
     70.6+X (6+)      70.5 5 M14.36α=4.36 11
    117.5+Y (3+)     117.5 5 E10.287α=0.287 5
    216.5+Y (2-,3-,4-)      99.0 5 (E1)0.441α=0.441 9

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      0 10.1 s 5 
% ε = 97.9 7
% α = 2.1 7
E(level): From 188Bi α decay (265 ms). It is possible that x=0, in which case the 0.0+x (7+) level would Be the g.s..
      0.0+X(7+)   E(level): From 188Bi α decay (265 ms). It is possible that x=0, in which case the 0.0+x (7+) level would Be the g.s..

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Additional Gamma Comments:

E(level)E(gamma)Comments
     70.6+X     70.5M(γ): from α(exp) in 188Bi α decay (265 ms).
    117.5+Y    117.5E(γ): From 188Bi α decay (60 ms).
M(γ): from α(K)exp in 188Bi α decay (60 ms).
    216.5+Y     99.0E(γ): From 188Bi α decay (60 ms).
M(γ): from α(K)exp in 188Bi α decay (60 ms).

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