ADOPTED LEVELS, GAMMAS for 231Ac

Authors: Balraj Singh, Jagdish K. Tuli, and Edgardo Browne |  Citation: Nucl. Data Sheets 185, 560 (2022) |  Cutoff date: 31-Aug-2022 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=1947 keV 13S(n)= 6147 keV 21S(p)= 6042 keV 17Q(α)= 3655 keV 14
Reference: 2021WA16

References:
  A  231Ra β- decay (103.9 S)  B  232Th(t,α)
  C  232Th(136Xe,137CSG)  D  232Th(209Bi,210POG)

General Comments:

1973Ch24: 231Ac produced and identified in 232Th(γ,p), 232Th(n,pn), followed by chemical separation. Measured half-life of 7.5 min from γ decay curves. Confirmation of this activity was made from an observed activity with T1/2=7.5 min 2, by milking four samples of the daughter nucleus 231Th every eight minutes and plotting the initial intensities of the 25.7 keV γ ray. Assignment of this activity to 231Ac was supported by its genetic relationship to 231Th.

α T1/2=15 min 1 activity reported by 1960Ta19 from γ rays of 85 keV and 185 keV, and very weak and uncertain γ rays of 280 keV, 390 keV, and 710 keV probably belonged to an impurity such as one of the short-lived tellurium isotopes from disagreement in the half-life value and in the intensity of the 280-keV γ ray, the strongest γ from 231Ac decay, as discussed by 1999Aa03 and 1973Ch24.

Mass measurement: 2012Ch19, 2012Zh46, 2005LiZZ

Theoretical calculations: consult the NSR database (www.nndc.bnl.gov/nsr/) for five primary references, also listed in this dataset under ’document’ records, one for nuclear structure and four for half-lives in radioactive decays. The ’document’ records can be accessed through on-line ENSDF database at www.nndc.bnl.gov/ensdf/

Levels: There is another possible band in 231Ac from 232Th(136Xe,137Csγ) (1999Br17) with cascade of 119.3, 178.6, 234.8, 285.8, 330.4, 368.8, 401.2, (428), (448) keV γ rays. Assignment of this band to 231Ac remains uncertain, as it was not reported in 232Th(209Bi,210Poγ) (2002AbZV,2000JaZY)

Q-value: S(2n)=11070 18, S(2p)=14483 14 (2021Wa16)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0AB D 1/2+ 7.5 m 1 
% β- = 100
     
     5.25 7 A    (1/2+,3/2+,5/2+)        
    18.35 8 A    (3/2-)       18.44 10 
   100
[E1]
     0.0
1/2+
    37.96 6 AB D (3/2)+       19.64 10 
    37.8 4 
  ≈100
    15 5 
[E1]
[M1]
    18.35
     0.0
(3/2-)
1/2+
    38 B   (3/2-)        
    61.70 7 A    (3/2+)       56.50 5 
   100
E2(+M1)
     5.25
(1/2+,3/2+,5/2+)
    68.50 6 ?A    (5/2+)       63.23 5 ?
   100
[M1,E2]
     5.25
(1/2+,3/2+,5/2+)
    74.70 6 A CD (5/2+)       36.74 5 
   100
[M1]
    37.96
(3/2)+
    76 5  B   (9/2+)        
    94 3  B   (7/2-)        
    96.07 5 ?A    (1/2,3/2)       96.01 6 ?
   100
[D]
     0.0
1/2+
   115.97 6 A    (3/2-) 14.3 ns 11      41.27 5 
    47.45 5 
    54.29 5 
    77.97 6 
     9.7 19 
     3.8 5 
   100 11 
    37.8 44 
[E1]
[E1]
E1
E1
    74.70
    68.50
    61.70
    37.96
(5/2+)
(5/2+)
(3/2+)
(3/2)+
   135 3  B   (13/2+)        
   160.63 7 A    (5/2-) < 0.90 ns     44.6 1 
   100
M1
   115.97
(3/2-)
   180.7 10   CD (9/2+)      106?
 

    74.70
(5/2+)
   237.90 6 AB   (3/2+) 57 ps 11      77.17 7 
   121.96 8 
   141.88 10 ?
   219.69 15 
   232.71 9 
   237.86 15 
     6.3 13 
    11.7 13 
    ≤7.5
    38 5 
   100 9 
    10.9 13 
E1
[E1]
[D]
[E1]
(E2(+M1))
[M1]
   160.63
   115.97
    96.07
    18.35
     5.25
     0.0
(5/2-)
(3/2-)
(1/2,3/2)
(3/2-)
(1/2+,3/2+,5/2+)
1/2+
   245.73 9 ?A    (1/2-,3/2-,5/2-)      129.76 7 
   100
M1+E2
   115.97
(3/2-)
   257 10  B   (5/2+)        
   266.68 6 A    (3/2-) 90 ps 20      21.0 4 ?
   106.48 9 ?
   150.75 10 
   170.41 10 ?
   192.00 8 
   198.18 8 
   205.00 10 
   228.73 10 
   260.82 10 
    <0.01
     8.0 13 
     1.29 16 
     2.25 32 
    24.6 27 
   100 10 
   117 26 
    28.1 27 
    25.4 24 
[M1]
[M1]
[M1]
[D]
[E1]
E1
E1
[E1]
[E1]
   245.73
   160.63
   115.97
    96.07
    74.70
    68.50
    61.70
    37.96
     5.25
(1/2-,3/2-,5/2-)
(5/2-)
(3/2-)
(1/2,3/2)
(5/2+)
(5/2+)
(3/2+)
(3/2)+
(1/2+,3/2+,5/2+)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   305 4  B          
   344.0 14   CD (13/2+)      163.3
 

   180.7
(9/2+)
   350 4  B          
   372.28 7 A    1/2-,3/2-      134.38 10 ?
   372.27 10 
     2.0 5 
   100 10 
[E1]
E1
   237.90
     0.0
(3/2+)
1/2+
   415.24 7 AB   (3/2-,5/2-)      177.39 8 
   254.57 10 
   299.10 15 
   396.92 15 
    11.5 18 
   100 10 
    40 4 
    35 11 
[E1]
M1
M1
M1
   237.90
   160.63
   115.97
    18.35
(3/2+)
(5/2-)
(3/2-)
(3/2-)
   449.48 8 A    (3/2-,5/2-)      211.50 10 
   288.94 10 
    43 13 
   100 13 
[E1]
M1
   237.90
   160.63
(3/2+)
(5/2-)
   456.48 10 ?A    (3/2+,5/2+)      295.74 15 
   381.76 15 ?
   387.99 15 ?
   394.90 15 
    15 4 
    24 4 
    35 9 
   100 10 
[E1]
[M1]
[M1]
M1
   160.63
    74.70
    68.50
    61.70
(5/2-)
(5/2+)
(5/2+)
(3/2+)
   471.58 8 AB   (5/2-) < 54 ps    204.79 10 
   355.66 20 
   396.92 15 ?
   403.03 15 
   409.89 10 
    44 15 
     3.7 7 
 
    27.9 27 
   100 9 
M1
M1

[E1]
E1
   266.68
   115.97
    74.70
    68.50
    61.70
(3/2-)
(3/2-)
(5/2+)
(5/2+)
(3/2+)
   473.24 11 ?A    (1/2-,3/2-)      357.26 10 
   473.40 30 ?
   100 9 
    14.5 31 
M1
[E1]
   115.97
     0.0
(3/2-)
1/2+
   478.17 10 A    1/2+,3/2+      211.50 10 
   478.15 15 
     6.8 27 
   100 14 
[E1]
M1
   266.68
     0.0
(3/2-)
1/2+
   485.69 7 A    (3/2+,5/2+)       70.44 5 
   113.40 8 
   247.65 15 
   325.12 15 
   369.52 30 
   417.55 10 ?
   467.39 15 
     6.4 8 
     8.8 8 
   100 10 
    20.0 24 
   118 21 
    11.2 16 
   109 16 
[E1]
[E1]
M1(+E2)


[M1]

   415.24
   372.28
   237.90
   160.63
   115.97
    68.50
    18.35
(3/2-,5/2-)
1/2-,3/2-
(3/2+)
(5/2-)
(3/2-)
(5/2+)
(3/2-)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   498.05 9 A    1/2+,3/2+       26.40 8 
   429.62 15 
   498.20 15 
    >4.0
    48 6 
   100 9 
[E1]
[M1]
M1
   471.58
    68.50
     0.0
(5/2-)
(5/2+)
1/2+
   512.96 9 A    1/2+,3/2+      444.32 10 ?
   475.29 15 
   494.57 30 
   513.00 15 
     4.9 9 
    49 5 
     4.3 9 
   100 13 
[M1]
M1

M1
    68.50
    37.96
    18.35
     0.0
(5/2+)
(3/2)+
(3/2-)
1/2+
   530.93 9 ?A    (5/2+)       81.48 9 
   456.19 15 
   462.38 15 
   469.23 15 
     6.7 9 
    74 7 
    59 5 
   100 9 
[E1]
M1
M1
M1
   449.48
    74.70
    68.50
    61.70
(3/2-,5/2-)
(5/2+)
(5/2+)
(3/2+)
   560.8 17   CD (17/2+)      216.8
 

   344.0
(13/2+)
   595.14 16 ?A    (3/2-)      434.50 15 
   595.3 5 
   100 9 
    36 5 
M1

   160.63
     0.0
(5/2-)
1/2+
   647 10  B          
   670.76 13 ?A         425.02 10 
   609.3 5 ?
   100 22 
   122 13 


   245.73
    61.70
(1/2-,3/2-,5/2-)
(3/2+)
   671 4  B   (11/2-)        
   680.77 9 A         195.09 10 
   442.90 10 
   612.5 5 ?
   662.0 3 
   100 11 
    53 7 
    12.3 12 
    64 6 




   485.69
   237.90
    68.50
    18.35
(3/2+,5/2+)
(3/2+)
(5/2+)
(3/2-)
   797 4  B   (5/2-)        
   824.85 20 ?A         586.8 6 
   763.1 3 
    67 13 
   100 27 


   237.90
    61.70
(3/2+)
(3/2+)
   825.6 20   CD (21/2+)      264.8
 

   560.8
(17/2+)
   847.2 3 ?A         432.00 30 ?
   842.0 5 
   200 28 
   100 33 


   415.24
     5.25
(3/2-,5/2-)
(1/2+,3/2+,5/2+)
   848.95 14 A         375.72 10 ?
   732.6 5 
   849.1 5 
    85 11 
   100 30 
    16 6 



   473.24
   115.97
     0.0
(1/2-,3/2-)
(3/2-)
1/2+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   870.1 5 A         754.1 5 
   100

   115.97
(3/2-)
   912.1 6 ?A         381.16 30 ?
   912.1 6 
     7.3 7 
   100 17 


   530.93
     0.0
(5/2+)
1/2+
   931.41 12 ?A         445.74 10 
   481.74 30 ?
   100 13 
    52 11 


   485.69
   449.48
(3/2+,5/2+)
(3/2-,5/2-)
  1021 7  B          
  1100.24 20 AB        275.38 10 
   569.4 5 
   614.6 3 ?
    31 12 
   100 14 
    29 4 



   824.85
   530.93
   485.69

(5/2+)
(3/2+,5/2+)
  1114.91 24 ?A        1040.2 5 
  1046.2 5 ?
   100 10 
    38 4 


    74.70
    68.50
(5/2+)
(5/2+)
  1126 6  B          
  1132.6 22   CD (25/2+)      307.0
 

   825.6
(21/2+)
  1137.9 4 A         666.3 4 ?
   871.1 6 
    28 5 
   100 10 


   471.58
   266.68
(5/2-)
(3/2-)
  1155.21 23 ?A          40.30 5 ?
  1086.3 6 ?
  1150.1 4 ?
  1155.6 6 ?
    18 8 
    60 8 
    78 10 
   100 30 
[D]



  1114.91
    68.50
     5.25
     0.0

(5/2+)
(1/2+,3/2+,5/2+)
1/2+
  1248.4 3 ?A         577.7 3 ?
  1248.3 5 ?
   100 32 
    37 11 


   670.76
     0.0

1/2+
  1288 5  B          
  1354.2 5 ?A         868.4 6 ?
  1354.4 9 ?
   100 16 
    14 3 


   485.69
     0.0
(3/2+,5/2+)
1/2+
  1476.4 25   CD (29/2+)      343.8
 

  1132.6
(25/2+)
  1850.4 26   CD (33/2+)      374
 

  1476.4
(29/2+)
  2255.4 28   CD (37/2+)      405
 

  1850.4
(33/2+)
  2681.4 30   CD (41/2+)      426
 

  2255.4
(37/2+)
  3122.0 32 ?  C  (45/2+)      440.6?
 

  2681.4
(41/2+)

E(level): From 231Ra β- decay, unless otherwise stated.

Jπ(level): Based on γ-ray multipolarities (2008Bo29) from ce data, and γ-decay pattern. Configurations for some of the levels are proposed by 2008Bo29

T1/2(level): For excited states, values are from βγγ(t) fast-timing technique (2008Bo29,2007Bo48)

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - π1/2[400]
     0.0 1/2+ 7.5 m 1 
% β- = 100
     
    37.96 6  (3/2)+        
    74.70 6  (5/2+)       36.74 5 
   100
[M1]
    37.96
(3/2)+
   180.7 10  (9/2+)      106?
 

    74.70
(5/2+)
   344.0 14  (13/2+)        
   560.8 17  (17/2+)      216.8
 

   344.0
(13/2+)
   825.6 20  (21/2+)      264.8
 

   560.8
(17/2+)
  1132.6 22  (25/2+)      307.0
 

   825.6
(21/2+)
  1476.4 25  (29/2+)        
  1850.4 26  (33/2+)        
  2255.4 28  (37/2+)      405
 

  1850.4
(33/2+)
  2681.4 30  (41/2+)      426
 

  2255.4
(37/2+)
  3122.0 32  (45/2+)        
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - π1/2[530]
    38 (3/2-)        
    94 3  (7/2-)        
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - π3/2[651]
    76 5  (9/2+)        
   135 3  (13/2+)        
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 4 - π3/2[402]
   237.90 6  (3/2+) 57 ps 11       
   257 10  (5/2+)        

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Additional Gamma Data:















E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
    18.35 (3/2-)       18.44 10 [E1] 6.29α=6.29 13
    37.96 (3/2)+       19.64 10 [E1] 5.29α=5.29 11
(3/2)+       37.8 4 [M1] 59.1α=59.1 21
    61.70 (3/2+)       56.50 5 E2(+M1)2.0 GT143α=143 14
    68.50 (5/2+)       63.23 5 [M1,E2] 52α=52 40
    74.70 (5/2+)       36.74 5 [M1] 64.3α=64.3 9
    96.07 (1/2,3/2)       96.01 6 [D] 2.0α=2.0 19
   115.97 (3/2-) 14.3 ns 11      41.27 5 [E1] 1.197B(E1)(W.u.)=7.5E-6 +17-15, α=1.197 17
(3/2-) 14.3 ns 11      47.45 5 [E1] 0.826B(E1)(W.u.)=1.93E-6 +36-31, α=0.826 12
(3/2-) 14.3 ns 11      54.29 5 E1 0.577B(E1)(W.u.)=3.39E-5 31, α=0.577 8
(3/2-) 14.3 ns 11      77.97 6 E1 0.220B(E1)(W.u.)=4.3E-6 +7-6, α=0.220 3
   160.63 (5/2-) < 0.90 ns     44.6 1 M1 36.3B(M1)(W.u.)>0.0072, α=36.3 5
   237.90 (3/2+) 57 ps 11      77.17 7 E1 0.226B(E1)(W.u.)=1.8E-4 +6-5, α=0.226 3
(3/2+) 57 ps 11     121.96 8 [E1] 0.302B(E1)(W.u.)=8.2E-5 +22-19, α=0.302 4
(3/2+) 57 ps 11     141.88 10 [D] 3.3α=3.3 31
(3/2+) 57 ps 11     219.69 15 [E1] 0.074B(E1)(W.u.)=4.6E-5 +12-11, α=0.074 1
(3/2+) 57 ps 11     232.71 9 (E2(+M1))4 GT0.40B(E2)(W.u.)=66 +37-23, B(M1)(W.u.)=7.3E-4 +35-73, α=0.40 4
(3/2+) 57 ps 11     237.86 15 [M1] 1.47B(M1)(W.u.)=0.00127 +33-30, α=1.47 2
   245.73 (1/2-,3/2-,5/2-)      129.76 7 M1+E2 5.8α=5.8 24
   266.68 (3/2-) 90 ps 20      21.0 4 [M1] 3.3×102B(M1)(W.u.)=4×10-4 +8-4, α=3.3E2 22
(3/2-) 90 ps 20     106.48 9 [M1] 2.86B(M1)(W.u.)=0.0044 +15-10, α=2.86 4
(3/2-) 90 ps 20     150.75 10 [M1] 5.30B(M1)(W.u.)=2.5×10-4 +8-6, α=5.30 8
(3/2-) 90 ps 20     170.41 10 [D] 1.9α=1.9 18
(3/2-) 90 ps 20     192.00 8 [E1] 0.1017B(E1)(W.u.)=1.9E-5 +6-4, α=0.1017 14
(3/2-) 90 ps 20     198.18 8 E1 0.0943B(E1)(W.u.)=7.0E-5 +22-14, α=0.0943 13
(3/2-) 90 ps 20     205.00 10 E1 0.0871B(E1)(W.u.)=7.4E-5 +23-18, α=0.0871 12
(3/2-) 90 ps 20     228.73 10 [E1] 0.0673B(E1)(W.u.)=1.28E-5 +41-27, α=0.0673 10
(3/2-) 90 ps 20     260.82 10 [E1] 0.0497B(E1)(W.u.)=7.8E-6 +25-16, α=0.0497 7
E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
   372.28 1/2-,3/2-      134.38 10 [E1] 0.239α=0.239 4
1/2-,3/2-      372.27 10 E1 0.0225α=0.0225 3
   415.24 (3/2-,5/2-)      177.39 8 [E1] 0.1228α=0.1228 17
(3/2-,5/2-)      254.57 10 M1 1.217α=1.217 17
(3/2-,5/2-)      299.10 15 M1 0.780α=0.780 11
(3/2-,5/2-)      396.92 15 M1 0.360α=0.360 5
   449.48 (3/2-,5/2-)      211.50 10 [E1] 0.0809α=0.0809 11
(3/2-,5/2-)      288.94 10 M1 0.857α=0.857 12
   456.48 (3/2+,5/2+)      295.74 15 [E1] 0.0370α=0.0370 5
(3/2+,5/2+)      381.76 15 [M1] 0.400α=0.400 6
(3/2+,5/2+)      387.99 15 [M1] 0.383α=0.383 5
(3/2+,5/2+)      394.90 15 M1 0.365α=0.365 5
   471.58 (5/2-) < 54 ps    204.79 10 M1 2.23B(M1)(W.u.)>0.0056, α=2.23 3
(5/2-) < 54 ps    355.66 20 M1 0.485B(M1)(W.u.)>8.0×10-5, α=0.485 7
(5/2-) < 54 ps    403.03 15 [E1] 0.0190B(E1)(W.u.)>3.8E-6, α=0.0190 3
(5/2-) < 54 ps    409.89 10 E1 0.0184B(E1)(W.u.)>1.4E-5, α=0.0184 3
   473.24 (1/2-,3/2-)      357.26 10 M1 0.479α=0.479 7
(1/2-,3/2-)      473.40 30 [E1] 0.0136α=0.0136 2
   478.17 1/2+,3/2+      211.50 10 [E1] 0.0809α=0.0809 12
1/2+,3/2+      478.15 15 M1 0.218α=0.218 3
   485.69 (3/2+,5/2+)       70.44 5 [E1] 0.288α=0.288 4
(3/2+,5/2+)      113.40 8 [E1] 0.358α=0.358 5
(3/2+,5/2+)      247.65 15 M1(+E2)0.8 LT0.9α=0.9 4
(3/2+,5/2+)      417.55 10 [M1] 0.314α=0.314 5
   498.05 1/2+,3/2+       26.40 8 [E1] 3.90α=3.90 7
1/2+,3/2+      429.62 15 [M1] 0.290α=0.290 4
1/2+,3/2+      498.20 15 M1 0.195α=0.195 3
E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
   512.96 1/2+,3/2+      444.32 10 [M1] 0.265α=0.265 4
1/2+,3/2+      475.29 15 M1 0.221α=0.221 3
1/2+,3/2+      513.00 15 M1 0.180α=0.180 3
   530.93 (5/2+)       81.48 9 [E1] 0.196α=0.196 3
(5/2+)      456.19 15 M1 0.247α=0.247 4
(5/2+)      462.38 15 M1 0.238α=0.238 3
(5/2+)      469.23 15 M1 0.229α=0.229 3
   595.14 (3/2-)      434.50 15 M1 0.282α=0.282 4
  1155.21       40.30 5 [D] 25α=25 24

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.01/2+ 7.5 m 1 
% β- = 100
E(level): π1/2[400].
    18.35(3/2-)   Tentative configuration=π1/2[530] (2008Bo29).
    37.96(3/2)+   E(level): π1/2[400].
Jπ(level): From comparison of 232Th(t,α) cross sections (1977Th04) with calculated values for band members, ’finger-print’ method, combined with systematics of level structures in 229Ac, 233Pa, 235Pa, 237Pa in 1977Th04. Evaluators consider the assignment as tentative, as strong arguments seem lacking.
    38(3/2-)   E(level): π1/2[530]. From (t,α).
Jπ(level): From comparison of 232Th(t,α) cross sections (1977Th04) with calculated values for band members, ’finger-print’ method, combined with systematics of level structures in 229Ac, 233Pa, 235Pa, 237Pa in 1977Th04. Evaluators consider the assignment as tentative, as strong arguments seem lacking.
    61.70(3/2+)   Tentative configuration=π3/2[651] (2008Bo29).
    68.50(5/2+)   Tentative configuration=π3/2[651] (2008Bo29).
    74.70(5/2+)   Tentative configuration=π1/2[400] (2008Bo29).
E(level): π1/2[400].
    76(9/2+)   E(level): π3/2[651]. From (t,α).
Jπ(level): From comparison of 232Th(t,α) cross sections (1977Th04) with calculated values for band members, ’finger-print’ method, combined with systematics of level structures in 229Ac, 233Pa, 235Pa, 237Pa in 1977Th04. Evaluators consider the assignment as tentative, as strong arguments seem lacking.
    94(7/2-)   E(level): π1/2[530]. From (t,α).
Jπ(level): From comparison of 232Th(t,α) cross sections (1977Th04) with calculated values for band members, ’finger-print’ method, combined with systematics of level structures in 229Ac, 233Pa, 235Pa, 237Pa in 1977Th04. Evaluators consider the assignment as tentative, as strong arguments seem lacking.
   115.97(3/2-) 14.3 ns 11  Tentative configuration=π3/2[532] (2008Bo29).
   135(13/2+)   E(level): π3/2[651]. From (t,α).
Jπ(level): From comparison of 232Th(t,α) cross sections (1977Th04) with calculated values for band members, ’finger-print’ method, combined with systematics of level structures in 229Ac, 233Pa, 235Pa, 237Pa in 1977Th04. Evaluators consider the assignment as tentative, as strong arguments seem lacking.
   160.63(5/2-) < 0.90 ns Tentative 5/2- member of configuration=π3/2[532] (2008Bo29).
   180.7(9/2+)   E(level): π1/2[400]. From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
Jπ(level): From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
   237.90(3/2+) 57 ps 11  XREF: B(235).
E(level): π3/2[402].
Jπ(level): From comparison of 232Th(t,α) cross sections (1977Th04) with calculated values for band members, ’finger-print’ method, combined with systematics of level structures in 229Ac, 233Pa, 235Pa, 237Pa in 1977Th04. Evaluators consider the assignment as tentative, as strong arguments seem lacking.
   257(5/2+)   E(level): π3/2[402]. From (t,α).
Jπ(level): From comparison of 232Th(t,α) cross sections (1977Th04) with calculated values for band members, ’finger-print’ method, combined with systematics of level structures in 229Ac, 233Pa, 235Pa, 237Pa in 1977Th04. Evaluators consider the assignment as tentative, as strong arguments seem lacking.
   305   E(level): From (t,α).
   344.0(13/2+)   E(level): π1/2[400]. From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
Jπ(level): From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
   350   E(level): From (t,α).
   415.24(3/2-,5/2-)   XREF: B(420).
   471.58(5/2-) < 54 ps XREF: B(469).
   530.93(5/2+)   Tentative configuration=π5/2[642] (2008Bo29).
   560.8(17/2+)   E(level): π1/2[400]. From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
Jπ(level): From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
   647   E(level): From (t,α).
   671(11/2-)   E(level): From (t,α).
   797(5/2-)   E(level): From (t,α).
E(level)Jπ(level)T1/2(level)Comments
   825.6(21/2+)   E(level): π1/2[400]. From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
Jπ(level): From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
  1021   E(level): From (t,α).
  1100.24   XREF: α(?)B(1100).
  1126   E(level): From (t,α).
  1132.6(25/2+)   E(level): π1/2[400]. From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
Jπ(level): From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
  1288   E(level): From (t,α).
  1476.4(29/2+)   E(level): π1/2[400]. From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
Jπ(level): From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
  1850.4(33/2+)   E(level): π1/2[400]. From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
Jπ(level): From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
  2255.4(37/2+)   E(level): π1/2[400]. From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
Jπ(level): From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
  2681.4(41/2+)   E(level): π1/2[400]. From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
Jπ(level): From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
  3122.0(45/2+)   E(level): π1/2[400]. From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).
Jπ(level): From 232Th(136Xe,137Csγ) and/or 232Th(209Bi,210Poγ). Jπ from possible band structure in 232Th(209Bi,210Poγ) (2002AbZV).

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Additional Gamma Comments:

E(level)E(gamma)Comments
   180.7   106E(γ): from 232Th(136Xe,137Csγ) (1999Br17), also expected from rotational-energy analysis.
   266.68   106.48E(γ): somewhat poor fit, level-energy difference=106.05
   260.82E(γ): poor fit, level-energy difference=261.43
   344.0   163.3E(γ): from (136Xe,137Cs). Other: 162.0 in (209Bi,210Po)
   415.24   396.92E(γ): Multiply placed
   449.48   211.50E(γ): Multiply placed with intensity suitably divided
I(γ): Multiply placed with intensity suitably divided
   471.58   396.92E(γ): Multiply placed
   478.17   211.50E(γ): Multiply placed with intensity suitably divided
I(γ): Multiply placed with intensity suitably divided
   485.69   417.55E(γ): somewhat poor fit, level-energy difference=417.19
   560.8   216.8E(γ): from (136Xe,137Cs). Other: 215.5 in (209Bi,210Po)
   825.6   264.8E(γ): from (136Xe,137Cs). Other: 263.6 in (209Bi,210Po)
  1132.6   307.0E(γ): from (136Xe,137Cs). Other: 306.4 in (209Bi,210Po)
  1476.4   343.8E(γ): from (136Xe,137Cs). Other: 341.9 in (209Bi,210Po)
  1850.4   374E(γ): from (136Xe,137Cs). Other: 372.7 in (209Bi,210Po)
  2255.4   405E(γ): from (136Xe,137Cs). Other: 399.9 in (209Bi,210Po)
  2681.4   426E(γ): from (136Xe,137Cs). Other: 422.4 in (209Bi,210Po)
  3122.0   440.6E(γ): 440.6 from (209Bi,210Po) only. As values in (209Bi,210Po) (2002AbZV) are consistently lower as compared to those in (136Xe,137Cs) (1999Br17), the given Eγ may be lower by ≈4 keV

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