ADOPTED LEVELS, GAMMAS for 239Am

Authors: E. Browne, J. K. Tuli |  Citation: Nucl. Data Sheets 122, 293 (2014) |  Cutoff date: 30-Jun-2013 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-1756 keV 54S(n)= 7102 keV 51S(p)= 4061.7 keV 17Q(α)= 5922.4 keV 14
Reference: 2012WA38

References:
  A  239Cm ε decay  B  243Bk α decay








E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0AB (5/2)- 11.9 h 1 
% ε = 99.990 1
% α = 0.010 1
     
    40.7 7 AB (7/2-)        
    94 6  B (9/2-)        
   156 7  B (11/2-)        
   187.1 5 AB (5/2+)     146.4 5 
  187.1 5 
   20 8 
  100 25 
(E1)
(E1)
    40.7
     0
(7/2-)
(5/2)-
   220 6  B (7/2+)        
   260 6  B (9/2+)        
   317 7  B (11/2+)        
  ≈370 B (13/2+)        
   557 6  B (3/2-)        
   586 6  B (5/2-)        
    25E+2 2    (7/2+) 163 ns 12 
% SF ≤ 100
     

Jπ(level): From rotational band structure and systematics of Nilsson orbitals. Additional arguments for spin and parity assignments are given mostly for bandheads.

Back to top

Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - GS ROTATIONAL band (2013Ni13)
     0 (5/2)- 11.9 h 1 
% ε = 99.990 1
% α = 0.010 1
     
    40.7 7  (7/2-)        
    94 6  (9/2-)        
   156 7  (11/2-)        
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - ROTATIONAL band BUILT ON 187 LEVEL (2013Ni13)
   187.1 5  (5/2+)        
   220 6  (7/2+)        
   260 6  (9/2+)        
   317 7  (11/2+)        
  ≈370 (13/2+)     
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - FAVORED ROTATIONAL band BUILT ON 557 LEVEL (2013Ni13)
   557 6  (3/2-)        
   586 6  (5/2-)        

Back to top

Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   187.1 (5/2+)     146.4 5 (E1)0.215α=0.215 4, α(K)=0.164 3, α(L)=0.0384 7, α(M)=0.00943 16, α(N)=0.00255 5, α(O)=0.000622 11, α(P)=0.0001077 18, α(Q)=4.53×10-6 8, α(N+)=0.00329 6
(5/2+)     187.1 5 (E1)0.1220α=0.1220 19, α(K)=0.0943 15, α(L)=0.0208 4, α(M)=0.00509 8, α(N)=0.001380 22, α(O)=0.000338 6, α(P)=5.96×10-5 10, α(Q)=2.68E-6 4, α(N+)=0.00178 3

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0(5/2)- 11.9 h 1 
% ε = 99.990 1
% α = 0.010 1
%ε, %α (1972Po04). Other measurements: 1960Gl01, 1952Hi63.
E(level): %ε, %α (1972Po04). Other measurements: 1960Gl01, 1952Hi63. GS ROTATIONAL band (2013Ni13).
    40.7(7/2-)   E(level): GS ROTATIONAL band (2013Ni13).
    94(9/2-)   E(level): GS ROTATIONAL band (2013Ni13).
   156(11/2-)   E(level): GS ROTATIONAL band (2013Ni13).
   187.1(5/2+)   E(level): ROTATIONAL band BUILT ON 187 LEVEL (2013Ni13).
   220(7/2+)   E(level): ROTATIONAL band BUILT ON 187 LEVEL (2013Ni13).
   260(9/2+)   E(level): ROTATIONAL band BUILT ON 187 LEVEL (2013Ni13).
   317(11/2+)   E(level): ROTATIONAL band BUILT ON 187 LEVEL (2013Ni13).
   370(13/2+)   E(level): ROTATIONAL band BUILT ON 187 LEVEL (2013Ni13).
   557(3/2-)   E(level): FAVORED ROTATIONAL band BUILT ON 557 LEVEL (2013Ni13).
   586(5/2-)   E(level): FAVORED ROTATIONAL band BUILT ON 557 LEVEL (2013Ni13).
    25E+2(7/2+) 163 ns 12 
% SF ≤ 100
μ=(+)2.6 (2011StZZ)
μ: g=0.74 5 (1985Ra28). g-factor measured by perturbed angular correlation of fission fragments in a magnetic field (1985Ra28).

Back to top