ADOPTED LEVELS, GAMMAS for 143Xe

Authors: E. Browne, J. K. Tuli |  Citation: Nucl. Data Sheets 113, 715 (2012) |  Cutoff date: 31-May-2011 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=7471 keV 23S(n)= 3045 keV 6S(p)= 1.27×104 keV 4Q(α)= -2423 keV 6
Reference: 2012WA38

References:
  A  248Cm SF decay 

General Comments:

Based on the shell model for deformed or spherical nuclei it is unlikely the existence of two 143Xe long lived β- decaying isomers. The T1/2=0.99 s activity previously assigned to 143Xe (T1/2=0.99 s 14 (1971Kr22), 0.96 s 2 (1965Pa14), ≈1 s (1950Di01); Eγ=139.5, 194.2 (1971Kr22)) possibly belongs to another Xe isotope, maybe 142Xe (T1/2=1.22 s 2)

Observed delayed neutrons (1972Am01) and γ rays following the emission of delayed neutrons (in nuclei with α=142) (1988Fa06)

Fission fragment yields: 2003Ga21, 2000Ga60

Atomic mass measurements: 2010Li02, 2009Ne11, 2008Su19.

Calculated level energies, magnetic and quadrupole moments: 2007Ji14.

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
     0.0A 5/2- 0.511 s 6 
% β- = 100
% β-n > 0
     
    78.8A (3/2,5/2,7/2)+      78.8
  100
E1
     0.0
5/2-
   322.9A     244.1
  100

    78.8
(3/2,5/2,7/2)+
   547.3A     224.4
  100

   322.9

   567.0A     244.1
  100

   322.9

   741.1A     174.0
  193.7
  418.2
 
   68 3 
  100 5 



   567.0
   547.3
   322.9



  1008.2A     267.1
  100

   741.1

  1428.9A     420.7
  100

  1008.2

  1962.7A     533.8
  100

  1428.9

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - γ CASCADE
    78.8 (3/2,5/2,7/2)+        
   322.9     244.1
  100

    78.8
(3/2,5/2,7/2)+
   741.1     174.0
  193.7
  418.2
 
   68 3 
  100 5 



   567.0
   547.3
   322.9



  1008.2     267.1
  100

   741.1

  1428.9     420.7
  100

  1008.2

  1962.7     533.8
  100

  1428.9

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
    78.8 (3/2,5/2,7/2)+      78.8E10.411α=0.411, α(K)=0.351 5, α(L)=0.0477 7, α(M)=0.00963 14, α(N+)=0.00300 5

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
    78.8(3/2,5/2,7/2)+   E(level): γ CASCADE.
   322.9   E(level): γ CASCADE.
   741.1   E(level): γ CASCADE.
  1008.2   E(level): γ CASCADE.
  1428.9   E(level): γ CASCADE.
  1962.7   E(level): γ CASCADE.

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