ADOPTED LEVELS, GAMMAS for 226Ra

Author: Y. A. Akovali |  Citation: Nucl. Data Sheets 77,433 (1996) |  Cutoff date: 1-Feb-1996 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-641 keV 4S(n)= 6396 keV 3S(p)= 7440 keV 13Q(α)= 4870.62 keV 25
Reference: 2012WA38

References:
  A  226Fr β- decay  B  226Ac ε decay
  C  230Th α decay  D  Coulomb Excitation
  E  226Ra(d,d’)  F  230Th(d,6Li)
  G  (HI,xnγ) 

General Comments:

Energies and wave functions of Kπ=0-, 2+, 2-, 3- and second 0- octupole-vibrational states were calculated by 1975Iv03. See 1983Pi04 for calculations of Kπ=0-, 0+ octupole-vibrational state energies; see 1970Ne08 for calculated energies of Kπ=0-,1-,2- and 3- bands; and 1982Zi02 for calculated energies of Kπ=0- band. The energies of the rotational states of the 0+ and 0- bands were calculated by 1995Al06, 1995De13 and 1995Jo11 and compared with the experimental level energies.

For calculations of equilibrium deformation parameters see, for example, 1975Iv03, 1982Du16, 1982Le19, 1983Ro14 and 1984Na22.

For calculations of electric quadrupole and hexadecapole moments see, for example, 1975Iv03 and 1983Ro14.

Effects of the Coriolis and centrifugal forces for nuclei with stable octupole deformation were examined; B(E3; 0+ to 3-,K=0) value and effective moments of inertia for g.s. and Kπ=0- bands were calculated as a function of octupole deformation by 1983Ro15. See also 1970Ne08 for calculated B(E3; 0+ to 3-) and 1977Ba45 for calculated B(E3; 0+ to 3-), B(E1; 0+ to 1-) values for Kπ=0- band.

See 1995De13 for calculated branching ratios for E1, E2, E3 transitions and comparisons with the experimental values.

Partial T1/2 for heavy ion emission were calculated by 1984Po08, 1985Po11 and 1995Si05. See 1995Na13 for discussions on multiclustering.

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
     0.0ABCDEFG 0+ 1600 y 7 
% α = 100
% 14C = 3.2×10-9 16
     
    67.67 1 ABCDEFG 2+ 0.63 ns 2      67.67 1 
  100
E2
     0.0
0+
   211.54 2 A CDEFG 4+ ≈ 0.17 ns    143.87 1 
  100
E2
    67.67
2+
   253.73 1 ABCDEFG 1-      186.05 1 
   253.73 1 
   73 4 
  100 7 
E1
E1
    67.67
     0.0
2+
0+
   321.54 6 A CDEFG 3-       67.81 20 
   110.00 5 
   253.9 1 
 
   10 3 
  100 11 



   253.73
   211.54
    67.67
1-
4+
2+
   416.5 3   CDEFG 6+      204.9 3 
  100

   211.54
4+
   446.3 2 A CDEFG 5-      124.8 2 
   234.8 2 
    3.3 11 
  100


   321.54
   211.54
3-
4+
   626.7 2    D  G 7-      180.4 2 
   210.3 2 
    8.5 10 
  100


   446.3
   416.5
5-
6+
   650   D F  (0+)      396
 

   253.73
1-
   669.4 3    D  G 8+      252.8 2 
  100

   416.5
6+
   824.6 1 A C  F  0+      570.9 1 
  100

   253.73
1-
   857.6 3    D  G 9-      188.2 2 
   231.0 2 
  100
   54 5 


   669.4
   626.7
8+
7-
   873.7 1 A C  F  2+      552.2 1 
   620.0 1 
   91 7 
  100 10 


   321.54
   253.73
3-
1-
   959.9 3    D  G 10+      290.6 2 
  100

   669.4
8+
  1048.8 1 A    F  1-      795.1 1 
   980.6 5 
  1048.1 5 
   32 3 
  100 10 
   79 9 



   253.73
    67.67
     0.0
1-
2+
0+
  1070.5 2 A       (2-)      816.9 2 
  1002.2 5 
   14.7 14 
  100 10 


   253.73
    67.67
1-
2+
  1077.2 2 A       1-,2      755.8 2 
   823.5 3 
  1009.0 5 
    9.5 10 
    7.8 8 
  100 10 



   321.54
   253.73
    67.67
3-
1-
2+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  1107 3     E   2+,3-        
  1122.4 3 A   E   (2+)      910.9 2 
  100

   211.54
4+
  1133.1 3    D  G 11-      173.2 2 
   275.5 2 
   70 7 
  100


   959.9
   857.6
10+
9-
  1140     F         
  1156.2 1 A   E   2+      834.7 1 
   902.6 3 
   944.6 3 
  1087.9 5 
  1155.8 5 
   56 4 
   16.0 12 
  100 10 
   42 4 
   60 6 





   321.54
   253.73
   211.54
    67.67
     0.0
3-
1-
4+
2+
0+
  1220     F         
  1238.9 5 A       (2)      917.3 5 
  1171.7 10 
   50 10 
  100 15 


   321.54
    67.67
3-
2+
  1280.5 4    D  G 12+      320.6 2 
 

   959.9
10+
  1330     F         
  1390.0 1 A   E   2+      516.30 5 
   565.4 1 
  1322.5 5 
  1390.7 10 
   10.4 8 
    8.2 8 
  100 9 
   57 6 




   873.7
   824.6
    67.67
     0.0
2+
0+
2+
0+
  1420     F         
  1422.5 10 A       0,1,2     1168.8 10 
  100

   253.73
1-
  1437.8 7 A       1-,2     1117.0 10 
  1183.5 8 
  100 25 
   86 9 


   321.54
   253.73
3-
1-
  1446   D    13-      166
   313
 
 


  1280.5
  1133.1
12+
11-
  1540     F         
  1587.3 5 A       1,2+     1333.6 5 
  1587.0 15 
  100 19 
   15 4 


   253.73
     0.0
1-
0+
  1621.3 5 A       1-,2+     1299.6 5 
  1368.3 10 
  1554.4 15 
  1620.9 15 
  100 14 
   53 14 
   25 6 
   29 4 




   321.54
   253.73
    67.67
     0.0
3-
1-
2+
0+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  1625   D    14+      179
   345
 
 


  1446
  1280.5
13-
12+
  1723.4 3 A   E   2+      646.2 3 
  1471.1 10 
  1655.0 10 
  1722.1 15 
   13 3 
  100 16 
   53 7 
   26 4 




  1077.2
   253.73
    67.67
     0.0
1-,2
1-
2+
0+
  1738.5 10 A       1,2+     1486.2 15 
  1670.4 10 
  1738.3 10 
   18 3 
   52 7 
  100 10 



   253.73
    67.67
     0.0
1-
2+
0+
  1756.2 10 A       1,2+     1503.2 10 
  1755.4 10 
   29 4 
  100 15 


   253.73
     0.0
1-
0+
  1767.1 10 A       0,1,2     1513.4 10 
 

   253.73
1-
  1778.4 10 A       0,1,2     1524.7 10 
 

   253.73
1-
  1786.1 10 A       1-,2+     1465.2 15 
  1532.4 10 
  1785.2 15 
   64 14 
  100 19 
   17 4 



   321.54
   253.73
     0.0
3-
1-
0+
  1793   D    15-      168
   347
 
 


  1625
  1446
14+
13-
  1865.0 10 A       1,2+      991.4 8 
  1610.7 10 
  1797.2 15 
  1865.5 10 
   23 4 
  100 11 
   26 4 
   58 6 




   873.7
   253.73
    67.67
     0.0
2+
1-
2+
0+
  1882.3 7 A       0,1,2      444.50 5 
 

  1437.8
1-,2
  1888.4 15 A       0,1,2     1634.7 15 
 

   253.73
1-
  1897.4 10 A       1-,2+     1576.0 10 
  1685.2 15 
  1897.8 15 
  100 29 
   57 12 
   72 15 



   321.54
   211.54
     0.0
3-
4+
0+
  1907.8 10 A       1,2+     1083.6 8 
  1839.6 10 
  1907.4 15 
   63 12 
  100 10 
   44 9 



   824.6
    67.67
     0.0
0+
2+
0+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  1945.6 10 A       1,2+     1692.6 10 
  1944.0 15 
  100 12 
   14 4 


   253.73
     0.0
1-
0+
  1951.0 10 A       1-,2+     1628.2 15 
  1697.3 10 
  1883.9 10 
  1951.1 15 
   24 4 
   82 12 
  100 12 
   31 1 




   321.54
   253.73
    67.67
     0.0
3-
1-
2+
0+
  1970.8 5 A       1-,2+      848.3 5 
  1648.9 15 
  1716.8 10 
  1903.4 10 
  1971.1 10 
   13.4 20 
   16.1 22 
   78 8 
  100 10 
   32 5 





  1122.4
   321.54
   253.73
    67.67
     0.0
(2+)
3-
1-
2+
0+
  1982.7 10 A       0+,1     1109.7 10 
  1728.4 10 
  1914.8 15 
   36 8 
  100 10 
   38 6 



   873.7
   253.73
    67.67
2+
1-
2+
  1993   D    16+      200?
   368
 
 


  1793
  1625
15-
14+
  2006.7 15 A       0,1,2     1753.0 15 
 

   253.73
1-
  2015.2 15 A       0,1,2     1761.5 15 
 

   253.73
1-
  2056.8 5 A       1,2+     1231.9 5 
  1990.3 10 
  2056.9 15 
  100 10 
   96 10 
   43 7 



   824.6
    67.67
     0.0
0+
2+
0+
  2086.1 10 A       1,2+     2017.6 10 
  2087.8 15 
  100 17 
   18 5 


    67.67
     0.0
2+
0+
  2170   D    17-      177
   377
 
 


  1993
  1793
16+
15-
  2182.3 15 A       0,1,2     1928.6 15 
 

   253.73
1-
  2189.4 10 A   E   2+     1365.0 10 
  2120.9 10 
  2190.9 15 
   75 30 
  100 14 
   31 5 



   824.6
    67.67
     0.0
0+
2+
0+
  2269.7 10 A       1,2+     2014.4 15 
  2202.2 10 
  2272.0 20 
   60 12 
  100 11 
   27 9 



   253.73
    67.67
     0.0
1-
2+
0+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  2382   D    18+      389
 

  1993
16+

Jπ(level): The Jπ assignments for all levels of the g.s. band and the K=0 octupole-vibrational band are from the Coulomb excitation, γ-decay pattern, and the (HI,xnγ) data. The arguments for the 2+ and the 1- states of these two bands are given explicitly. Assignments made from (d,d’) data are based on deuteron angular distributions and on measured cross sections.

E(γ): From 226Fr β- decay, 230Th α decay and (HI,xnγ), except where noted.

I(γ): Relative photon intensity deexciting each level, adopted from 226Fr β- decay, 230Th α decay and (HI,xnγ) data.

M(γ): From ce work in 230Th α decay and 226Ac ε decay.

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - K=0 GS band.
     0.0 0+ 1600 y 7 
% α = 100
% 14C = 3.2×10-9 16
     
    67.67 1  2+ 0.63 ns 2      67.67 1 
  100
E2
     0.0
0+
   211.54 2  4+ ≈ 0.17 ns    143.87 1 
  100
E2
    67.67
2+
   416.5 3  6+      204.9 3 
  100

   211.54
4+
   669.4 3  8+      252.8 2 
  100

   416.5
6+
   959.9 3  10+      290.6 2 
  100

   669.4
8+
  1280.5 4  12+      320.6 2 
 

   959.9
10+
  1625 14+      179
   345
 
 


  1446
  1280.5
13-
12+
  1993 16+      200?
   368
 
 


  1793
  1625
15-
14+
  2382 18+      389
 

  1993
16+
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - K=0 octupole VIBRATIONAL band.
   253.73 1  1-        
   321.54 6  3-       67.81 20 
   110.00 5 
   253.9 1 
 
   10 3 
  100 11 



   253.73
   211.54
    67.67
1-
4+
2+
   446.3 2  5-      124.8 2 
   234.8 2 
    3.3 11 
  100


   321.54
   211.54
3-
4+
   626.7 2  7-      180.4 2 
   210.3 2 
    8.5 10 
  100


   446.3
   416.5
5-
6+
   857.6 3  9-      188.2 2 
   231.0 2 
  100
   54 5 


   669.4
   626.7
8+
7-
  1133.1 3  11-      173.2 2 
   275.5 2 
   70 7 
  100


   959.9
   857.6
10+
9-
  1446 13-      166
   313
 
 


  1280.5
  1133.1
12+
11-
  1793 15-      168
   347
 
 


  1625
  1446
14+
13-
  2170 17-      177
   377
 
 


  1993
  1793
16+
15-
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - K=0 band.
   824.6 1  0+        
   873.7 1  2+      552.2 1 
   620.0 1 
   91 7 
  100 10 


   321.54
   253.73
3-
1-
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 4 - K=1 band.
  1048.8 1  1-        
  1070.5 2  (2-)      816.9 2 
  1002.2 5 
   14.7 14 
  100 10 


   253.73
    67.67
1-
2+

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
    67.67 2+ 0.63 ns 2      67.67 1 E261.9B(E2)(W.u.)=123 5, α=61.9
   211.54 4+ ≈ 0.17 ns    143.87 1 E22.11B(E2)(W.u.)≈212, α=2.11
   253.73 1-      186.05 1 E10.108α=0.108
1-      253.73 1 E10.0520α=0.0520

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 1600 y 7 
% α = 100
% 14C = 3.2×10-9 16
%14C/%α=3.2×10-11 16 (1985Ho21). Other measurement: %14C/%α|<1×10-10 (1985Al28).
E(level): %14C/%α=3.2×10-11 16 (1985Ho21). Other measurement: %14C/%α|<1×10-10 (1985Al28). K=0 GS band.
    67.672+ 0.63 ns 2  E(level): K=0 GS band.
   211.544+ ≈ 0.17 ns E(level): K=0 GS band.
   253.731-   E(level): K=0 octupole VIBRATIONAL band.
   321.543-   B(E3)=1.10 11
E(level): K=0 octupole VIBRATIONAL band.
   416.56+   E(level): K=0 GS band.
   446.35-   E(level): K=0 octupole VIBRATIONAL band.
   626.77-   E(level): K=0 octupole VIBRATIONAL band.
   669.48+   E(level): K=0 GS band.
   824.60+   E(level): K=0 band.
   857.69-   E(level): K=0 octupole VIBRATIONAL band.
   873.72+   E(level): K=0 band.
   959.910+   E(level): K=0 GS band.
  1048.81-   E(level): K=1 band.
  1070.5(2-)   E(level): K=1 band.
  1133.111-   E(level): K=0 octupole VIBRATIONAL band.
  1140   Jπ(level): From Jπ=L-1, deduced in (d,6Li).
  1238.9(2)   Gammas to 2+, 3- states and β- decay from 1- 226Fr are consistent with Jπ=1-,2. The Alaga rule and absence of a γ to the g.s. imply J=2.
E(level): Gammas to 2+, 3- states and β- decay from 1- 226Fr are consistent with Jπ=1-,2. The Alaga rule and absence of a γ to the g.s. imply J=2.
  1280.512+   E(level): K=0 GS band.
  1420   This level might be the same level observed in 226Fr β- decay at 1422.5.
E(level): This level might be the same level observed in 226Fr β- decay at 1422.5.
Jπ(level): From Jπ=L-1, deduced in (d,6Li).
  1437.81-,2   Gammas to 1-, 3- states and the log ft of 8.2 from 1- 226Fr suggest Jπ=1- or 2.
E(level): Gammas to 1-, 3- states and the log ft of 8.2 from 1- 226Fr suggest Jπ=1- or 2.
  144613-   E(level): K=0 octupole VIBRATIONAL band.
  1540   Jπ(level): From Jπ=L-1, deduced in (d,6Li).
  162514+   E(level): K=0 GS band.
  179315-   E(level): K=0 octupole VIBRATIONAL band.
E(level)Jπ(level)T1/2(level)Comments
  199316+   E(level): K=0 GS band.
  2006.70,1,2   log ft=7.3 for the β- decay from 1- 226Fr parent.
E(level): log ft=7.3 for the β- decay from 1- 226Fr parent.
  2015.20,1,2   log ft=7.5 for the β branch from 1- 226Fr parent.
E(level): log ft=7.5 for the β branch from 1- 226Fr parent.
  217017-   E(level): K=0 octupole VIBRATIONAL band.
  2182.30,1,2   log ft=7.5 for the β branch from 1- 226Fr parent.
E(level): log ft=7.5 for the β branch from 1- 226Fr parent.
  238218+   E(level): K=0 GS band.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   650   396E(γ): from Coulomb excitation.

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