ADOPTED LEVELS, GAMMAS for 255Lr

Authors: E. Browne, J. K. Tuli |  Citation: Nucl. Data Sheets 114, 1041 (2013) |  Cutoff date: 1-Nov-2011 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-4383 keV SYS(n)= 7997 keV SYS(p)= 2066 keV 20Q(α)= 8556 keV 7
Reference: 2012WA38

References:
  A  209Bi(48Ca,2nγ)  B  255Lr IT decay (2.54 S)
  C  259Db α decay  D  255Lr IT decay (1.70 MS)

General Comments:

Calculations, compilation:

α decay: 1993Bu09

g.s. properties: 1997Mo25, 1995Mo29

Single-particle Nilsson levels: 2010Ad19, 2004Pa40, 2004HeZZ, 2003Be41, 1994Cw02.

1994Cw02 have calculated the following single-particle level sequence: g.s., 7/2[514]; 0.14 MeV, 9/2[624]; 0.15 MeV, 1/2[521]; 0.73 MeV, 5/2[512]; 0.87 MeV, 7/2[633].

Q(α) and T1/2: 2011Sa40, 2010Si27, 2009Do22, 2008Do12, 2002Lo05.

Assignment: 249Cf(10B,4n), 249Cf(11B,5n), 243Am(16O,4n) excit (1971Es01)

Q-value: Estimated ΔQ(β-)=116, ΔS(n)=302 (2012Wa38).










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0ABCD [1/2-] 31.1 s 11 
% α = 99.7 1
% ε = 0.3 1
% SF < 0.1
     
    38 10 AB D [7/2-] 2.54 s 5 
% α ≈ 40
% IT ≈ 60
     
  38+XA    (9/2-)        
     YA    (9/2+)        
    69.5+Y 4 A    (11/2+)      69.5 4 
  100
[M1]
     Y
(9/2+)
   151.8+Y 5 A    (13/2+)      82.3 3 
  100
[M1]
    69.5+Y
(11/2+)
   196.6 5 A    5/2-     196.6 5 
  100

     0.0
[1/2-]
   227.0+X 10 A    (11/2-)     189 1 
  100

    38
[7/2-]
   253.0+X 10 A    (13/2-)     215 1 
  100

  38+X
(9/2-)
   246.5+Y 5 A    (15/2+)      94.7 3 
  177.0 4 
  100
   33 11 
[M1]
[E2]
   151.8+Y
    69.5+Y
(13/2+)
(11/2+)
   353.4+Y 6 A    (17/2+)     107
  100

   246.5+Y
(15/2+)
   443.8 7 A    9/2-     247.2 5 
  100

   196.6
5/2-
   466.0 15 A    (15/2-)     239 1 
  100

   196.6
5/2-
   517.6+X 12 A    (17/2-)     264.6 5 
  100

   253.0+X
(13/2-)
   740.0 9 A    (13/2-)     296.2 5 
  100

   443.8
9/2-
   754.4+X 15 A    (19/2-)     288.4 4 
  100

   517.6+X
(17/2-)
   740.0+Y 5 A    (15/2+) < 1 µs   386.6 4 
  493.5 3 
  588.1 3 
   23 8 
  100 14 
   91 15 
[M1]
[M1]
[M1]
   353.4+Y
   246.5+Y
   151.8+Y
(17/2+)
(15/2+)
(13/2+)
   831.6+XA    (21/2-)     314.0 5 
  100

   517.6+X
(17/2-)
   850.4+Y 6 A    (17/2+)     110.4 3 
  100
[M1]
   740.0+Y
(15/2+)
   878.8+Y 10 A    (19/2-) ≥ 10 ns    28S
  100
[E1]
   850.4+Y
(17/2+)
   972.9+YA    (19/2+)     123 1 
  100
[M1]
   850.4+Y
(17/2+)
  1016.3+Y 10 A    (21/2-)     137.4 4 
  100
[M1]
   878.8+Y
(19/2-)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  1082.9 10 A    (17/2-)     342.9 5 
  100

   740.0
(13/2-)
  1092.4+X 18 A    (23/2-)     338 1 
  100

   754.4+X
(19/2-)
  1108.0+Y 10 A    (21/2+)     135.2 3 
  100
[M1]
   972.9+Y
(19/2+)
  1191.6+X 16 A    (25/2-)     360 1 
  100

   831.6+X
(21/2-)
  1164.7+Y 10 A    (23/2-)     148.3 4 
  100
[M1]
  1016.3+Y
(21/2-)
  1408.6+Y 10 A  D (25/2+) 1.70 ms 3 
% α < 0.15
% IT > 99.85
  243.9 3 
  300.6 3 
   61 15 
  100 12 
[E1]
[E2]
  1164.7+Y
  1108.0+Y
(23/2-)
(21/2+)
  1469.9 15 A    (21/2-)     387 1 
  100

  1082.9
(17/2-)
  1476.4 21 A    (27/2-)     384 1 
  100

  1082.9
(17/2-)
  1899.9 18 A    (25/2-)     430 1 
  100

  1469.9
(21/2-)

E(level): Deduced by evaluators from least-squares fit to γ-ray energies.

Jπ(level): Based on rotational band structure and γ-ray decay patterns, unless otherwise specified.

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - 1/2[521] band
   196.6 5  5/2-        
   443.8 7  9/2-        
   740.0 9  (13/2-)        
  1082.9 10  (17/2-)        
  1469.9 15  (21/2-)     387 1 
  100

  1082.9
(17/2-)
  1899.9 18  (25/2-)     430 1 
  100

  1469.9
(21/2-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - 7/2[514] band
    38 10  [7/2-] 2.54 s 5 
% α ≈ 40
% IT ≈ 60
     
  38+X (9/2-)        
   227.0+X 10  (11/2-)        
   253.0+X 10  (13/2-)        
   466.0 15  (15/2-)     239 1 
  100

   196.6
5/2-
   517.6+X 12  (17/2-)     264.6 5 
  100

   253.0+X
(13/2-)
   754.4+X 15  (19/2-)     288.4 4 
  100

   517.6+X
(17/2-)
   831.6+X (21/2-)     314.0 5 
  100

   517.6+X
(17/2-)
  1092.4+X 18  (23/2-)     338 1 
  100

   754.4+X
(19/2-)
  1191.6+X 16  (25/2-)     360 1 
  100

   831.6+X
(21/2-)
  1476.4 21  (27/2-)     384 1 
  100

  1082.9
(17/2-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - 9/2[624] band
     Y (9/2+)        
    69.5+Y 4  (11/2+)        
   151.8+Y 5  (13/2+)        
   246.5+Y 5  (15/2+)        
   353.4+Y 6  (17/2+)     107
  100

   246.5+Y
(15/2+)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 4 - K=(19/2-) band
   878.8+Y 10  (19/2-) ≥ 10 ns      
  1016.3+Y 10  (21/2-)        
  1164.7+Y 10  (23/2-)        
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 5 - K=(15/2+) band
   740.0+Y 5  (15/2+) < 1 µs      
   850.4+Y 6  (17/2+)        
   972.9+Y (19/2+)        
  1108.0+Y 10  (21/2+)        

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
    69.5+Y (11/2+)      69.5 4 [M1]41.7α=41.7 10, α(L)=31.1 7, α(M)=7.75 17, α(N)=2.19 5, α(O)=0.593 13, α(P)=0.118 3, α(Q)=0.00765 17, α(N+)=2.91 7
   151.8+Y (13/2+)      82.3 3 [M1]25.5α=25.5 5, α(L)=19.0 4, α(M)=4.73 9, α(N)=1.336 24, α(O)=0.362 7, α(P)=0.0723 13, α(Q)=0.00466 9, α(N+)=1.77 4
   246.5+Y (15/2+)      94.7 3 [M1]16.9α=16.9 3, α(L)=12.62 22, α(M)=3.14 6, α(N)=0.888 15, α(O)=0.241 4, α(P)=0.0481 8, α(Q)=0.00310 6, α(N+)=1.180 20
(15/2+)     177.0 4 [E2]2.79α=2.79 5, α(K)=0.1218 18, α(L)=1.91 4, α(M)=0.552 10, α(N)=0.159 3, α(O)=0.0416 8, α(P)=0.00701 12, α(Q)=5.54×10-5 9, α(N+)=0.208 4
   740.0+Y (15/2+) < 1 µs   386.6 4 [M1]1.341α=1.341, α(K)=1.030 15, α(L)=0.232 4, α(M)=0.0576 9, α(N)=0.01625 24, α(O)=0.00440 7, α(P)=0.000877 13, α(Q)=5.58×10-5 8, α(N+)=0.0216 3
(15/2+) < 1 µs   493.5 3 [M1]0.685α=0.685, α(K)=0.526 8, α(L)=0.1181 17, α(M)=0.0293 5, α(N)=0.00827 12, α(O)=0.00224 4, α(P)=0.000446 7, α(Q)=2.83×10-5 4, α(N+)=0.01098 16
(15/2+) < 1 µs   588.1 3 [M1]0.424α=0.424, α(K)=0.326 5, α(L)=0.0729 11, α(M)=0.0181 3, α(N)=0.00510 8, α(O)=0.001380 20, α(P)=0.000275 4, α(Q)=1.746×10-5 25, α(N+)=0.00677 10
   850.4+Y (17/2+)     110.4 3 [M1]10.86α=10.86 18, α(L)=8.09 13, α(M)=2.02 4, α(N)=0.569 10, α(O)=0.1542 25, α(P)=0.0308 5, α(Q)=0.00198 4, α(N+)=0.756 13
   878.8+Y (19/2-) ≥ 10 ns    28[E1]2.68α=2.68, α(L)=1.516 22, α(M)=0.856 12, α(N)=0.239 4, α(O)=0.0585 9, α(P)=0.00763 11, α(Q)=0.0001590 23, α(N+)=0.306 5
   972.9+Y (19/2+)     123 1 [M1]7.95α=7.95 22, α(L)=5.92 17, α(M)=1.48 4, α(N)=0.417 12, α(O)=0.113 4, α(P)=0.0225 7, α(Q)=0.00145 4, α(N+)=0.554 16
  1016.3+Y (21/2-)     137.4 4 [M1]5.78α=5.78 10, α(L)=4.31 7, α(M)=1.073 18, α(N)=0.303 5, α(O)=0.0821 14, α(P)=0.0164 3, α(Q)=0.001051 18, α(N+)=0.402 7
  1108.0+Y (21/2+)     135.2 3 [M1]6.06α=6.06, α(L)=4.51 7, α(M)=1.123 18, α(N)=0.317 5, α(O)=0.0860 14, α(P)=0.0172 3, α(Q)=0.001101 17, α(N+)=0.422 7
  1164.7+Y (23/2-)     148.3 4 [M1]4.64α=4.64 8, α(L)=3.46 6, α(M)=0.861 14, α(N)=0.243 4, α(O)=0.0659 11, α(P)=0.01315 21, α(Q)=0.000843 14, α(N+)=0.323 6
  1408.6+Y (25/2+) 1.70 ms 3 
% α < 0.15
% IT > 99.85
  243.9 3 [E1]0.0790α=0.0790, α(K)=0.0596 9, α(L)=0.01446 21, α(M)=0.00360 6, α(N)=0.001009 15, α(O)=0.000267 4, α(P)=4.92×10-5 7, α(Q)=2.25E-6 4, α(N+)=0.001328 19
(25/2+) 1.70 ms 3 
% α < 0.15
% IT > 99.85
  300.6 3 [E2]0.389α=0.389, α(K)=0.0893 13, α(L)=0.215 4, α(M)=0.0612 9, α(N)=0.0176 3, α(O)=0.00462 7, α(P)=0.000802 12, α(Q)=1.159×10-5 17, α(N+)=0.0230 4

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.0[1/2-] 31.1 s 11 
% α = 99.7 1
% ε = 0.3 1
% SF < 0.1
%α Deduced by evaluators from data in 2008Ha31. Other values: %α=85 15; %ε+%β+<30; %SF<0.1, from 1971Es01. Upper limit deduced from comparison of possible 255No (ε daughter) α’s to 255Lr α’s. %SF from T1/2(SF)>6 h (1976Og02,2000Ho27) and T1/2=31.1 s.
E(level): %α Deduced by evaluators from data in 2008Ha31. Other values: %α=85 15; %ε+%β+<30; %SF<0.1, from 1971Es01. Upper limit deduced from comparison of possible 255No (ε daughter) α’s to 255Lr α’s. %SF from T1/2(SF)>6 h (1976Og02,2000Ho27) and T1/2=31.1 s.
    38[7/2-] 2.54 s 5 
% α ≈ 40
% IT ≈ 60
E(level): 7/2[514] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
  38+X(9/2-)   E(level): 7/2[514] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
     Y(9/2+)   E(level): 9/2[624] band.
    69.5+Y(11/2+)   E(level): 9/2[624] band. From 2009Je02 in 209Bi(48Ca,2nγ). From 2009Je02 in 209Bi(48Ca,2nγ).
   151.8+Y(13/2+)   E(level): 9/2[624] band. From 2009Je02 in 209Bi(48Ca,2nγ). From 2009Je02 in 209Bi(48Ca,2nγ).
   196.65/2-   E(level): 1/2[521] band. From 2009Je02 in 209Bi(48Ca,2nγ). From 2009Je02 in 209Bi(48Ca,2nγ).
   227.0+X(11/2-)   E(level): 7/2[514] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
   253.0+X(13/2-)   E(level): 7/2[514] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
   246.5+Y(15/2+)   E(level): 9/2[624] band. From 2009Je02 in 209Bi(48Ca,2nγ). From 2009Je02 in 209Bi(48Ca,2nγ).
   353.4+Y(17/2+)   E(level): 9/2[624] band. From 2009Je02 in 209Bi(48Ca,2nγ). From 2009Je02 in 209Bi(48Ca,2nγ).
   443.89/2-   E(level): 1/2[521] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
   466.0(15/2-)   E(level): 7/2[514] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
   517.6+X(17/2-)   E(level): 7/2[514] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
   740.0(13/2-)   E(level): 1/2[521] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
   754.4+X(19/2-)   E(level): 7/2[514] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
   740.0+Y(15/2+) < 1 µs E(level): K=(15/2+) band. From 2009Je02 in 209Bi(48Ca,2nγ). From 2009Je02 in 209Bi(48Ca,2nγ).
   831.6+X(21/2-)   E(level): 7/2[514] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
   850.4+Y(17/2+)   E(level): K=(15/2+) band. From 2009Je02 in 209Bi(48Ca,2nγ). From 2009Je02 in 209Bi(48Ca,2nγ).
   878.8+Y(19/2-) ≥ 10 ns E(level): K=(19/2-) band. From 2009Je02 in 209Bi(48Ca,2nγ). From 2009Je02 in 209Bi(48Ca,2nγ).
   972.9+Y(19/2+)   E(level): K=(15/2+) band. From 2009Je02 in 209Bi(48Ca,2nγ). From 2009Je02 in 209Bi(48Ca,2nγ).
  1016.3+Y(21/2-)   E(level): K=(19/2-) band. From 2009Je02 in 209Bi(48Ca,2nγ). From 2009Je02 in 209Bi(48Ca,2nγ).
  1082.9(17/2-)   E(level): 1/2[521] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
  1092.4+X(23/2-)   E(level): 7/2[514] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
  1108.0+Y(21/2+)   E(level): K=(15/2+) band. From 2009Je02 in 209Bi(48Ca,2nγ). From 2009Je02 in 209Bi(48Ca,2nγ).
E(level)Jπ(level)T1/2(level)Comments
  1191.6+X(25/2-)   E(level): 7/2[514] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
  1164.7+Y(23/2-)   E(level): K=(19/2-) band. From 2009Je02 in 209Bi(48Ca,2nγ). From 2009Je02 in 209Bi(48Ca,2nγ).
  1408.6+Y(25/2+) 1.70 ms 3 
% α < 0.15
% IT > 99.85
E(level): From 2009Je02 in 209Bi(48Ca,2nγ). From 2009Je02 in 209Bi(48Ca,2nγ).
  1469.9(21/2-)   E(level): 1/2[521] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
  1476.4(27/2-)   E(level): 7/2[514] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.
  1899.9(25/2-)   E(level): 1/2[521] band. From 2009Ke02 in 209Bi(48Ca,2nγ). From 2009Ke02, assumed E2.

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Additional Gamma Comments:

E(level)E(gamma)Comments
    69.5+Y    69.5E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
   151.8+Y    82.3E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
   196.6   196.6E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
   227.0+X   189E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
   253.0+X   215E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
   246.5+Y    94.7E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
   177.0E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
   353.4+Y   107E(γ): From Fig. 2 in 2009Je02.
   443.8   247.2E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
   466.0   239E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
   517.6+X   264.6E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
   740.0   296.2E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
   754.4+X   288.4E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
   740.0+Y   386.6E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
   493.5E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
   588.1E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
   831.6+X   314.0E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
   850.4+Y   110.4E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
   972.9+Y   123E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
  1016.3+Y   137.4E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
  1082.9   342.9E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
  1092.4+X   338E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
  1108.0+Y   135.2E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
  1191.6+X   360E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
  1164.7+Y   148.3E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
E(level)E(gamma)Comments
  1408.6+Y   243.9E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
   300.6E(γ): From 2009Je02 in 209Bi(48Ca,2nγ).. From 2009Je02 in 209Bi(48Ca,2nγ).
I(γ): From 2009Je02 in 209Bi(48Ca,2nγ).
  1469.9   387E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
  1476.4   384E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.
  1899.9   430E(γ): From 2009Ke02 in 209Bi(48Ca,2nγ).. From 2009Ke02, assumed E2.

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