ADOPTED LEVELS, GAMMAS for 253Fm

Authors: E. Browne, J. K. Tuli |  Citation: Nucl. Data Sheets 114, 1041 (2013) |  Cutoff date: 1-Mar-2012 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-1826 keV SYS(n)= 5540 keV 6S(p)= 5235 keV 50Q(α)= 7198 keV 3
Reference: 2012WA38

References:
  A  257No α decay  B  253Md ε decay

General Comments:

Calculations, compilations:

α decay: 1993Bu09, 1992Bu03

Binding energies: 1997Pa22

Deformation parameters: 1997Pa22, 2003Ga34

g.s. properties: 1997Mo25, 1995Mo29, 2005Pa73

Heavy ion emission: 1985Po11

2005Re16: Predicted SF half-life=6.1×103 y

Single-particle Nilsson levels: 1994Cw02, 2005Pa73

1994Cw02 have calculated the following single-particle level sequence: g.s., 1/2[620]; 0.11 MeV, 3/2[622]; 0.24 MeV, 7/2[613]; 0.33 MeV, 11/2[725]; 0.38 MeV, 9/2[734]; 0.75 MeV, 9/2[615]

2005Pa73 have calculated the following single-particle level sequence: g.s., 1/2[620]; 0.07 MeV, 3/2[622]; 0.25 MeV, 11/2[725]; 0.26 MeV, 7/2[613]; 0.39 MeV, 9/2[734]

Q-value: Estimated ΔQ(β-)=30 (2012Wa38)










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
      0.0AB 1/2+ 3.00 d 12 
% ε = 88 1
% α = 12 1
     
     22.3 1 AB (3/2+)      22.3?
 

      0.0
1/2+
     47.1 2 AB (5/2+)      24.8?
   47.1?
 
 


     22.3
      0.0
(3/2+)
1/2+
    124.1 1 AB 3/2+      77.0 2 
  101.8 1 
  124.1 1 
  100 8 
   57 13 
   78 28 
M1
(M1)
M1
     47.1
     22.3
      0.0
(5/2+)
(3/2+)
1/2+
      X B 7/2+        
    158.7 2 AB (5/2+)     136.4 2 
  100
(M1)
     22.3
(3/2+)
   60+X B 9/2+        
  135+X B 11/2+        
  211+X B 11/2- 0.56 µs 6     76.8
  150.5 5 
 
 
(E1)
(E1)
  135+X
   60+X
11/2+
9/2+
  398+X B 9/2+     188.0 5 
  338.2 5 
  398.2?
 
 
 
(E1)


  211+X
   60+X
      X
11/2-
9/2+
7/2+

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Band 1/2+[620]
      0.0 1/2+ 3.00 d 12 
% ε = 88 1
% α = 12 1
     
     22.3 1  (3/2+)      22.3?
 

      0.0
1/2+
     47.1 2  (5/2+)      24.8?
   47.1?
 
 


     22.3
      0.0
(3/2+)
1/2+
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - Band 3/2+[622] (tentative)
    124.1 1  3/2+        
    158.7 2  (5/2+)     136.4 2 
  100
(M1)
     22.3
(3/2+)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - 7/2+[613]
      X 7/2+        
   60+X 9/2+     
  135+X 11/2+     

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
    124.1 3/2+      77.0 2 M122.4α=22.4, α(L)=16.8 3, α(M)=4.15 7, α(N)=1.159 19, α(O)=0.306 5, α(P)=0.0595 10, α(Q)=0.00335 6, α(N+)=1.528 25
3/2+     101.8 1 (M1)9.97α=9.97, α(L)=7.45 11, α(M)=1.84 3, α(N)=0.514 8, α(O)=0.1360 20, α(P)=0.0264 4, α(Q)=0.001484 22, α(N+)=0.678 10
3/2+     124.1 1 M15.63α=5.63, α(L)=4.20 6, α(M)=1.039 15, α(N)=0.290 5, α(O)=0.0767 11, α(P)=0.01488 22, α(Q)=0.000836 12, α(N+)=0.383 6
    158.7 (5/2+)     136.4 2 (M1)4.29α=4.29, α(L)=3.20 5, α(M)=0.792 12, α(N)=0.221 4, α(O)=0.0584 9, α(P)=0.01134 17, α(Q)=0.000636 10, α(N+)=0.292 5
  211+X 11/2- 0.56 µs 6     76.8(E1)0.307α=0.307, α(L)=0.229 4, α(M)=0.0576 8, α(N)=0.01592 23, α(O)=0.00400 6, α(P)=0.000638 9, α(Q)=1.84×10-5 3, α(N+)=0.0206 3
11/2- 0.56 µs 6    150.5 5 (E1)0.215α=0.215 4, α(K)=0.1596 25, α(L)=0.0417 7, α(M)=0.01037 17, α(N)=0.00287 5, α(O)=0.000735 12, α(P)=0.0001268 21, α(Q)=4.55×10-6 8, α(N+)=0.00374 6
  398+X 9/2+     188.0 5 (E1)0.1317α=0.1317 20, α(K)=0.0994 15, α(L)=0.0242 4, α(M)=0.00600 10, α(N)=0.00166 3, α(O)=0.000427 7, α(P)=7.51×10-5 12, α(Q)=2.87E-6 5, α(N+)=0.00217 4

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      0.01/2+ 3.00 d 12 
% ε = 88 1
% α = 12 1
E(level): Band 1/2+[620].
     22.3(3/2+)   XREF: B(?).
E(level): Band 1/2+[620].
     47.1(5/2+)   XREF: B(?).
E(level): Band 1/2+[620].
    124.13/2+   E(level): Band 3/2+[622] (tentative).
      X7/2+   E(level): 7/2+[613].
    158.7(5/2+)   XREF: B(?).
E(level): Band 3/2+[622] (tentative).
   60+X9/2+   E(level): 7/2+[613].
  135+X11/2+   E(level): 7/2+[613].
  398+X9/2+   Configuration=ν9/2[615].

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Additional Gamma Comments:

E(level)E(gamma)Comments
  211+X     76.8M(γ): from estimated low conversion electron intensity
    150.5M(γ): α(K)exp<0.6 gives E1 or E2. E1 is preferred from intensity arguments. E3 is excluded from lifetime arguments
  398+X    188.0M(γ): α(K)exp<0.87 gives E1 or E2. E1 is preferred from intensity arguments. E3 is excluded from lifetime arguments

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