ADOPTED LEVELS, GAMMAS for 154Sm

Author: C. W. Reich |  Citation: Nucl. Data Sheets 110, 2257 (2009) |  Cutoff date: 1-May-2008 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-717.1 keV 11S(n)= 7966.8 keV 9S(p)= 9096 keV 9Q(α)= -1200.3 keV 10
S(2n)= 13835.2 keV 9S(2p)= 16884 keV 9
Reference: 2017WA10

References:
  A  154Sm(n,n’γ)  B  154Sm(γ,γ’),(E,E’)
  C  Inelastic scattering  D  154Pm β- decay (2.68 M)
  E  154Pm β- decay (1.73 M)  F  Coulomb Excitation
  G  152Sm(t,p)  H  154Eu ε decay

General Comments:

The data on Eγ and Iγ values and Jπ assignments are primarily from the 154Pm β- decays (1.73~min and 2.68~min) (1971Da28,1974Ya07,1993GrZY) and the (n,n’γ) reaction (2006De19).

Levels: In the Inelastic Scattering and (n,n’γ) data sets, a number of levels are shown which are not included in this Adopted Levels data set. For a listing of those levels, see those source data sets.

Levels: 2006De19, in (n,n’γ), do not confirm the population of levels at 1104, 1120, 1295, 1365 and 1371~keV, if they have J|<5. see, also, the Inelastic Scattering Data Set.

Gammas: The unplaced γ’s are not given here, see 154Pm γ- decay (1.73 m and 2.68 m) and 154Sm(n,n’γ).










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0ABCDEFGH 0+ STABLE      
    81.981 15 ABCDEFGH 2+ 3.02 ns 4      81.990 18 
  100
E2
     0.0
0+
   266.817 22 ABCDEF H 4+ 172 ps 4     184.810 25 
  100
E2
    81.981
2+
   544.10 4 ABCD F   6+ 22.7 ps 6     277.34 4 
  100
E2
   266.817
4+
   902.75 19 A    F   8+ 5.9 ps 3     358.8 2 
  100
E2
   544.10
6+
   921.345 19 ABCDEF   1- 21 fs 1     839.36 2 
   921.33 3 
  100 3 
   68 2 
E1
E1
    81.981
     0.0
2+
0+
  1012.40 3 A CDEF   3- 23 fs 3     745.50 4 
   930.37 3 
   59.0 18 
  100 1 
E1
E1
   266.817
    81.981
4+
2+
  1099.26 5 ABC EFG  0+ 0.90 ps 21    1017.23 10 
  100
[E2]
    81.981
2+
  1177.812 21 ABCDEF   2+ > 2.4 ps    910.96 3 
  1095.86 3 
  1177.79 4 
   75 6 
  100 2 
   65.8 14 
E2
E2+M1
E2
   266.817
    81.981
     0.0
4+
2+
0+
  1181.26 4 A C  F   5-      637.14 6 
   914.44 3 
   35
  100 2 
E1
E1
   544.10
   266.817
6+
4+
  1202.44 6 ABC E G  0+      281.01 9 
  1120.51 8 
  100 21 
   79 2 

E2
   921.345
    81.981
1-
2+
  1286.29 4 A  DE G  2+      274.0 10 
   364.91 6 
  1019.40 20 
  1204.30 4 
  1286.8 5 
   34 1 
   52 6 
   54.1 17 
  100 10 
    6.9 10 

E1

M1+E2

  1012.40
   921.345
   266.817
    81.981
     0.0
3-
1-
4+
2+
0+
  1333.0 9 A    F   10+ 2.45 ps 12     430.2 5 
  100
[E2]
   902.75
8+
  1337.60 5 A C  F   4+      794.9 2 
  1070.68 7 
  1255.55 7 
   32 2 
   84 3 
  100 2 

E2+M1
E2
   544.10
   266.817
    81.981
6+
4+
2+
  1430.93 14 A    F   7-      528.8 4 
   886.75 14 
   30 4 
  100 6 


   902.75
   544.10
8+
6+
  1440.04 3 ABCDEF   2+ 0.42 ps 3    1173.1 4 
  1358.09 3 
  1440.05 10 
    8.0 9 
  100 2 
  100
[E2]
[M1+E2]
[E2]
   266.817
    81.981
     0.0
4+
2+
0+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  1472.16 12 A  D     (4+)      460.0 3 
  1205.4 2 
   34
  100 18 


  1012.40
   266.817
3-
4+
  1475     F   (6+)      931
  1208
 
 


   544.10
   266.817
6+
4+
  1475.81 4 A C E    1-      554.3 4 
  1393.83 3 
  1476.0 6 
    5.6 11 
  100
    2.5 7 



   921.345
    81.981
     0.0
1-
2+
0+
  1515.18 5 A C      2-     1433.19 5 
  100 3 
E1
    81.981
2+
  1539.19 4 A CD F   3+     1272.34 7 
  1457.23 4 
   38.0 17 
  100 3 

E2+M1
   266.817
    81.981
4+
2+
  1577     F   6+      674
  1033
  1310
 
 
 



   902.75
   544.10
   266.817
8+
6+
4+
  1584.50 5 A CD     3-       45.5
  1317.68 4 
  1502.6 2 
 
  100 3 
   20.0 16 

E1
E1
  1539.19
   266.817
    81.981
3+
4+
2+
  1614.77 7     E         693.39 6 
  100

   921.345
1-
  1660.65 4 A        4-     1393.83 3 
  100

   266.817
4+
  1664.82 7 A CD F   4+     1398.00 6 
  1582.8 3 
  100 3 
   33.0 18 
M1(+E2)
E2
   266.817
    81.981
4+
2+
  1673.90 7 A  DE    2      661.47 9 
   752.57 10 
  100 2 
   82 3 
E1,M1
E1,M1
  1012.40
   921.345
3-
1-
  1706.71 5 A CD     3+     1440.05 10 
  1624.87 12 
  100
   45 18 
M1+E2
M1+E2
   266.817
    81.981
4+
2+
  1741     F   (8+)     1197
 

   544.10
6+
  1754.51 5    DE         742.2 3 
   833.4 3 
   85
  100


  1012.40
   921.345
3-
1-
  1755.67 4 AB DE    1-,2,3-      315.5 3 
   742.90 6 
   834.05 20 
  1674.1 4 
   33 7 
  100 3 
   99 3 
   11.7 15 




  1440.04
  1012.40
   921.345
    81.981
2+
3-
1-
2+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  1760     F   9-      857
 

   902.75
8+
  1764.4 4     E        1681.6 5 
  1764.9 4 
   60
  100


    81.981
     0.0
2+
0+
  1774.31 8 A CD     5-     1230.16 7 
  1509.0 4 
  100 4 
   20 3 

E1
   544.10
   266.817
6+
4+
  1804.99 10 A  D F   5+     1261.0 1 
  1538.1 2 
   47 4 
  100 5 

M1(+E2)
   544.10
   266.817
6+
4+
  1815.04 5 A CD     2+,3      276.00 25 
   375.06 8 
   528.8 4 
   637.14 6 
   802.7 3 
  1548.6 2 
  1733.11 15 
   46
  100
   12
   24
   27
   77
   93






E1,M1
  1539.19
  1440.04
  1286.29
  1177.812
  1012.40
   266.817
    81.981
3+
2+
2+
2+
3-
4+
2+
  1818.37 8 A  D     4+,5,6+     1274.33 19 
  1551.54 9 
   40 4 
  100 4 


   544.10
   266.817
6+
4+
  1825.9 10      F   12+ 1.39 ps 9     492.9 5 
  100
[E2]
  1333.0
10+
  1878.70 4 A  D     2+      339.68 20 
   406.63 15 
   438.76 20 
   592.5 3 
   701.1 3 
   956.9 3 
  1611.97 25 
  1796.85 15 
  1878.3 5 
   25
   23
   79
   45
   21
   76 9 
   46
  100
    6.2







M1+E2

  1539.19
  1472.16
  1440.04
  1286.29
  1177.812
   921.345
   266.817
    81.981
     0.0
3+
(4+)
2+
2+
2+
1-
4+
2+
0+
  1890.45 11 AB  E    1-      603.54 25 
   688.1 4 
  1808.29 19 
  1890.80 16 
   12
   15 5 
  100 7 
   83 5 


E1
E1
  1286.29
  1202.44
    81.981
     0.0
2+
0+
2+
0+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  1900 B           1820
  1900
 
 


    81.981
     0.0
2+
0+
  1922.05 4 AB D     2+      584.4 6 
   909.7 3 
  1655.24 15 
  1840.44 18 
   19 4 
   21
  100 6 
   98 6 




  1337.60
  1012.40
   266.817
    81.981
4+
3-
4+
2+
  1925.56 16 A            1658.73 15 
  100

   266.817
4+
  1945.61 6 A  DE         933.5 4 
  1024.40 8 
  1863.3 5 
  100
   69
   18

E1,M1

  1012.40
   921.345
    81.981
3-
1-
2+
  1973.76 5 ABC E    1-,2+      961.3 5 
  1891.8 3 
  1973.59 20 
   17
   81
  100



  1012.40
    81.981
     0.0
3-
2+
0+
  1974     F   (6+)     1430
  1707
 
 


   544.10
   266.817
6+
4+
  1986.59 4 AB D     3-       64.548 25 
   107.896 25 
   171.6 3 
   230.82 3 
   232.08 3 
   279.93 4 
   402.15 10 
   447.5 3 
   471.36 20 
   546.66 6 
   700.0 3 ?
   974.0 4 ?
  1719.74 25 
  1905.1 4 
   33
   47
   49
   43
   30
   82
   11
    3.0
    7.0
  100
    4.5
    2.0
    4.8
    5.2
E1
E1
E1











  1922.05
  1878.70
  1815.04
  1755.67
  1754.51
  1706.71
  1584.50
  1539.19
  1515.18
  1440.04
  1286.29
  1012.40
   266.817
    81.981
2+
2+
2+,3
1-,2,3-

3+
3-
3+
2-
2+
2+
3-
4+
2+
  2013.4 6 A C           675.8 6 
  100 20 

  1337.60
4+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  2015.40 6 A   E    (1-,2+)      837.4
  1002.8 10 
  1933.5 3 
  2015.5 4 
  100
   53
   93
   67




  1177.812
  1012.40
    81.981
     0.0
2+
3-
2+
0+
  2062 4   C             
  2065.90 8    D          143.74 15 
   247.75 15 
   359.16 8 
   526.7 4 
  1799.4 5 ?
   12
   17
  100
    7.1
    3.7





  1922.05
  1818.37
  1706.71
  1539.19
   266.817
2+
4+,5,6+
3+
3+
4+
  2069     F   (10+)     1166
 

   902.75
8+
  2069.07 4 A   E    (2+)       95.2 3 ?
   782.9 3 
   866.5 3 
   891.28 4 
   969.79 6 
  1057.0 5 
  1147.69 6 
  1801.6 5 
  1987.04 10 
  2069.04 8 
    0.5
    2.5
    5.3
   71
   56 4 
    1.0
  100 6 
    1.4
   14 2 
   20 2 










  1973.76
  1286.29
  1202.44
  1177.812
  1099.26
  1012.40
   921.345
   266.817
    81.981
     0.0
1-,2+
2+
0+
2+
0+
3-
1-
4+
2+
0+
  2130 4   C             
  2131.82 6 A   E    (2+)       62.62 6 ?
   953.97 8 
  1032.55 8 
  1210.2 3 
  1865.7 5 
  2050.1 3 
    3.2
  100
   69
   15
    6.4
   13






  2069.07
  1177.812
  1099.26
   921.345
   266.817
    81.981
(2+)
2+
0+
1-
4+
2+
  2139.82 4 A   E    (1,2+)      124.43 4 
   166.06 3 
   194.29 6 
   384.5 3 
   465.8 3 
   524.2 3 
   624.6 4 
   664.20 14 
   700.0 3 
   853.1 5 ?
   937.30 12 
   962.00 8 
  1040.7 5 
  1218.57 10 
  1873.6 8 ?
  2057.76 6 
  2139.76 8 
    1.1
    3.6
    0.9
    0.4
    1.0
    0.5
    0.8
    3.0
    1.2
    0.6
    2.2
   19.1 16 
    0.8
    3.7
    0.4
  100 10 
   57

E1















  2015.40
  1973.76
  1945.61
  1755.67
  1673.90
  1614.77
  1515.18
  1475.81
  1440.04
  1286.29
  1202.44
  1177.812
  1099.26
   921.345
   266.817
    81.981
     0.0
(1-,2+)
1-,2+

1-,2,3-
2

2-
1-
2+
2+
0+
2+
0+
1-
4+
2+
0+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  2154.3?     F   7+        
  2163     F   11-      403?
   830
 
 


  1760
  1333.0
9-
10+
  2196.2 5 ?    E    (1,2+)     1096.9 5 ?
  100

  1099.26
0+
  2232.8 4 A  D          526.0 4 
  2150.5 5 ?
  100
   14


  1706.71
    81.981
3+
2+
  2275 4   C             
  2288 4   C             
  2293.85 12    D     (2+,3,4+)      307.3 3 ?
   371.7 3 ?
   415.23 15 
   709.1 3 
   853.1 5 ?
  2026.9 3 
  2211.9 3 
   27
  ≤29
  100
   48
  ≤60
   57
   48







  1986.59
  1922.05
  1878.70
  1584.50
  1440.04
   266.817
    81.981
3-
2+
2+
3-
2+
4+
2+
  2368.81 14     E    (1,2+)      853.3
  1082.0 5 
  1191.1 3 
  1447.4 3 ?
  2287.0 3 
  2368.74 20 
  ≤26
   22
   44
   34
   26
  100






  1515.18
  1286.29
  1177.812
   921.345
    81.981
     0.0
2-
2+
2+
1-
2+
0+
  2373.0     F   14+      547.1
 

  1825.9
12+
  2421.4?    E    (1,2+)     2340.8 5 ?
  2421.4 4 ?
  100
   87


    81.981
     0.0
2+
0+
  2428.48 11     E        2346.48 10 
  100

    81.981
2+
  2439     F   (12+)     1106
 

  1333.0
10+
  2443.5 4  B       1+     2361.5 5 
  2443.5 5 
   38 24 
  100
[M1]
M1
    81.981
     0.0
2+
0+
  2486 3 ? B              
  2556.56 22  B  E    1-     2474.5 3 
  2556.6 3 
  100
   48 6 
[E1]
E1
    81.981
     0.0
2+
0+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  2591.32 10     E         917.0 5 
  1389.3 3 
  1670.16 25 
  2509.27 15 
  2591.14 20 
   13
   25
   19
  100
   39





  1673.90
  1202.44
   921.345
    81.981
     0.0
2
0+
1-
2+
0+
  2618.03 12  B  E    1-     2536.08 15 
  2617.92 20 
  100
   67 12 
[E1]
E1
    81.981
     0.0
2+
0+
  2636     F   13-      473?
   810
 
 


  2163
  1825.9
11-
12+
  2721.28 24     E    (1,2+)     2639.2 4 
  2721.3 3 
   41
  100


    81.981
     0.0
2+
0+
  2743.7 4  B       1-     2661.7 5 
  2743.7 5 
  100
   58 8 
[E1]
E1
    81.981
     0.0
2+
0+
  2778.63 17  B  E    1     1022.4 4 
  1576.7 8 
  1856.3 4 
  2697.4 3 
  2778.6 3 
   33
   36
   36
   27
  100




D
  1755.67
  1202.44
   921.345
    81.981
     0.0
1-,2,3-
0+
1-
2+
0+
  2793?     F   (14+)      967?
 

  1825.9
12+
  2825.3 5  B       1-     2743.3 5 
  2825.3 5 
  100
   53 14 
[E1]
E1
    81.981
     0.0
2+
0+
  2842.8 4  B  E    1-     2761.1 5 
  2842.6 4 
  100
   71 10 
[E1]
E1
    81.981
     0.0
2+
0+
  2882.0 5  B       1-     2800.0 5 
  2882.0 5 
  100
   79 26 
[E1]
E1
    81.981
     0.0
2+
0+
  2907.3 5  B       1+     2825.3 5 
  2907.3 5 
   52 13 
  100
[M1]
M1
    81.981
     0.0
2+
0+
  2968.2     F   16+      595.2
 

  2373.0
14+
  3051.23 15     E         919.23 20 
  1576.7 8 
  1764.9 4 
  1873.6 8 
  2130.4 3 
  2968.9 4 
  100
   41
   55
   24
   72
   45






  2131.82
  1475
  1286.29
  1177.812
   921.345
    81.981
(2+)
(6+)
2+
2+
1-
2+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  3091.5 5  B       1+     3009.5 5 
  3091.5 5 
   49 5 
  100
[M1]
M1
    81.981
     0.0
2+
0+
  3117.0 5  B       1+     3035.0 5 
  3117.0 5 
   53 6 
  100
[M1]
M1
    81.981
     0.0
2+
0+
  3193.42 17  B  E    1+     1374.3 3 
  1389.3 3 
  1487.1 3 ?
  2015.5 4 
  3111.2 5 
  3193.4 5 
   46
  100
   57
   36
   29
   51 4 




[M1]
M1
  1818.37
  1804.99
  1706.71
  1177.812
    81.981
     0.0
4+,5,6+
5+
3+
2+
2+
0+
  3339.5 5  B       1     3257.5 5 S
  3339.5 5 
  ≤21
  100

D
    81.981
     0.0
2+
0+
  3365.9 5  B       1     3283.9 5 S
  3365.9 5 
  ≤21
  100

D
    81.981
     0.0
2+
0+
  3371.1 5  B       1+     3289.1 5 
  3371.1 5 
   67 20 
  100
[M1]
M1
    81.981
     0.0
2+
0+
  3426.4 5  B       1     3344.4 5 S
  3426.4 5 
  ≤21
  100

D
    81.981
     0.0
2+
0+
  3492.4 5  B       1+     3410.4 5 
  3492.4 5 
   42 20 
  100
[M1]
M1
    81.981
     0.0
2+
0+
  3609.3     F   18+      641.1
 

  2968.2
16+
  3621.7 5  B       1+     3539.7 5 
  3621.7 5 
   49 14 
  100
[M1]
M1
    81.981
     0.0
2+
0+
  3745.8 5  B       1     3663.8 5 S
  3745.8 5 
  ≤17
  100

D
    81.981
     0.0
2+
0+
  3759.8 5  B       1     3677.8 5 S
  3759.8 5 
  ≤28
  100

D
    81.981
     0.0
2+
0+
  3801.3 5  B       1     3719.3 5 
  3801.3 4 
   93 23 
  100

D
    81.981
     0.0
2+
0+
  3826.7 5  B       1-     3744.7 5 
  3826.7 5 
  100
   41 6 
[E1]
E1
    81.981
     0.0
2+
0+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  3836.7 5  B       1     3754.7 5 
  3836.7 5 
   85 30 
  100

D
    81.981
     0.0
2+
0+
  3844.0 5  B       1     3762.0 5 
  3844.0 5 
  112 40 
  100

D
    81.981
     0.0
2+
0+
  4020 10  B           3940
  4020
 
 


    81.981
     0.0
2+
0+
  4240 10  B           4160
  4240
 
 


    81.981
     0.0
2+
0+
  4295.7     F   20+      686.4
 

  3609.3
18+
  4300 10  B           4220
  4300
 
 


    81.981
     0.0
2+
0+
  5027.9     F   22+      732.2
 

  4295.7
20+
  6465.2 10  B       1- 4.3 fs 21    3979 2 ?
  4479 3 
  4543 3 
  4709 3 
  5025 3 
  5263 3 
  5287 3 
  5366 3 
  5544 3 
  6383 3 
  6465 3 
   10 2 
    0.3
   10 2 
    4 3 
    5 3 
    7 1 
    8 2 
   45 1 
    8 2 
   67 1 
  100




[E1]
E1
E1
E1
E1
E1+M2
E1
  2486
  1986.59
  1922.05
  1755.67
  1440.04
  1202.44
  1177.812
  1099.26
   921.345
    81.981
     0.0

3-
2+
1-,2,3-
2+
0+
2+
0+
1-
2+
0+

E(level): From least-squares fit to γ energies, except omitted are those γ’s with questionable placements and Eγ’s that do not have uncertainties.

E(γ): Values are from the measurement giving the most precise value. This is often the 154Sm(n,n’γ) reaction or one of the 154Pm β- decays.

I(γ): From 154Pm β- decays (1971Da28,1974Ya07,1993GrZY) and (n,n’γ) (1986Be52).

M(γ): From ce data following Coulomb excitation (1970Da28) and (n,n’γ), unless noted otherwise.

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Kπ=0+ ground-state band.
     0.0 0+ STABLE      
    81.981 15  2+ 3.02 ns 4      81.990 18 
  100
E2
     0.0
0+
   266.817 22  4+ 172 ps 4     184.810 25 
  100
E2
    81.981
2+
   544.10 4  6+ 22.7 ps 6     277.34 4 
  100
E2
   266.817
4+
   902.75 19  8+ 5.9 ps 3     358.8 2 
  100
E2
   544.10
6+
  1333.0 9  10+ 2.45 ps 12     430.2 5 
  100
[E2]
   902.75
8+
  1825.9 10  12+ 1.39 ps 9     492.9 5 
  100
[E2]
  1333.0
10+
  2373.0 14+      547.1
 

  1825.9
12+
  2968.2 16+      595.2
 

  2373.0
14+
  3609.3 18+      641.1
 

  2968.2
16+
  4295.7 20+      686.4
 

  3609.3
18+
  5027.9 22+      732.2
 

  4295.7
20+
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - Kπ=0- octupole-vibrational band.
   921.345 19  1- 21 fs 1       
  1012.40 3  3- 23 fs 3     745.50 4 
   930.37 3 
   59.0 18 
  100 1 
E1
E1
   266.817
    81.981
4+
2+
  1181.26 4  5-      637.14 6 
   914.44 3 
   35
  100 2 
E1
E1
   544.10
   266.817
6+
4+
  1430.93 14  7-      528.8 4 
   886.75 14 
   30 4 
  100 6 


   902.75
   544.10
8+
6+
  1760 9-      857
 

   902.75
8+
  2163 11-      403?
   830
 
 


  1760
  1333.0
9-
10+
  2636 13-      473?
   810
 
 


  2163
  1825.9
11-
12+
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - First excited Kπ=0+ band. α=13.60 keV, B=-84 eV, computed
  1099.26 5  0+ 0.90 ps 21       
  1177.812 21  2+ > 2.4 ps    910.96 3 
  1095.86 3 
  1177.79 4 
   75 6 
  100 2 
   65.8 14 
E2
E2+M1
E2
   266.817
    81.981
     0.0
4+
2+
0+
  1337.60 5  4+      794.9 2 
  1070.68 7 
  1255.55 7 
   32 2 
   84 3 
  100 2 

E2+M1
E2
   544.10
   266.817
    81.981
6+
4+
2+
  1577 6+      674
  1033
  1310
 
 
 



   902.75
   544.10
   266.817
8+
6+
4+
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 4 - Kπ=2+ γ-vibrational band.
  1440.04 3  2+ 0.42 ps 3       
  1539.19 4  3+     1272.34 7 
  1457.23 4 
   38.0 17 
  100 3 

E2+M1
   266.817
    81.981
4+
2+
  1664.82 7  4+     1398.00 6 
  1582.8 3 
  100 3 
   33.0 18 
M1(+E2)
E2
   266.817
    81.981
4+
2+
  1804.99 10  5+     1261.0 1 
  1538.1 2 
   47 4 
  100 5 

M1(+E2)
   544.10
   266.817
6+
4+
  1974 (6+)     1430
  1707
 
 


   544.10
   266.817
6+
4+
  2154.3 7+     
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 5 - Second excited Kπ=0+ band. α=14.18 keV, B=-35 eV, computed
  1202.44 6  0+        
  1286.29 4  2+      274.0 10 
   364.91 6 
  1019.40 20 
  1204.30 4 
  1286.8 5 
   34 1 
   52 6 
   54.1 17 
  100 10 
    6.9 10 

E1

M1+E2

  1012.40
   921.345
   266.817
    81.981
     0.0
3-
1-
4+
2+
0+
  1472.16 12  (4+)      460.0 3 
  1205.4 2 
   34
  100 18 


  1012.40
   266.817
3-
4+
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 6 - Kπ=1- octupole-vibrational band.
  1475.81 4  1-        
  1515.18 5  2-     1433.19 5 
  100 3 
E1
    81.981
2+
  1584.50 5  3-       45.5
  1317.68 4 
  1502.6 2 
 
  100 3 
   20.0 16 

E1
E1
  1539.19
   266.817
    81.981
3+
4+
2+
  1660.65 4  4-     1393.83 3 
  100

   266.817
4+
  1774.31 8  5-     1230.16 7 
  1509.0 4 
  100 4 
   20 3 

E1
   544.10
   266.817
6+
4+

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Additional Gamma Data:















E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
    81.981 2+ 3.02 ns 4      81.990 18 E2 4.86B(E2)(W.u.)=176 1, α=4.86
   266.817 4+ 172 ps 4     184.810 25 E2 0.272B(E2)(W.u.)=245 6, α=0.272
   544.10 6+ 22.7 ps 6     277.34 4 E2 0.0721B(E2)(W.u.)=289 8, α=0.0721
   902.75 8+ 5.9 ps 3     358.8 2 E2 0.0327B(E2)(W.u.)=319 17, α=0.0327
   921.345 1- 21 fs 1     839.36 2 E1 B(E1)(W.u.)=0.0113 7
1- 21 fs 1     921.33 3 E1 B(E1)(W.u.)=0.0058 4
  1012.40 3- 23 fs 3     745.50 4 E1 B(E1)(W.u.)=0.0092 13
3- 23 fs 3     930.37 3 E1 B(E1)(W.u.)=0.0080 11
  1099.26 0+ 0.90 ps 21    1017.23 10 [E2] B(E2)(W.u.)=12 3
  1177.812 2+ > 2.4 ps    910.96 3 E2 B(E2)(W.u.)<2.4
2+ > 2.4 ps   1095.86 3 E2+M1+6E+1 +13-3B(E2)(W.u.)<1.3, B(M1)(W.u.)<4.3E-6
2+ > 2.4 ps   1177.79 4 E2 B(E2)(W.u.)<0.58
  1286.29 2+     1204.30 4 M1+E2+0.8 +15-6 
  1333.0 10+ 2.45 ps 12     430.2 5 [E2] 0.0193B(E2)(W.u.)=314 16, α=0.0193
  1337.60 4+     1070.68 7 E2+M150 GT 
  1440.04 2+ 0.42 ps 3    1173.1 4 [E2] B(E2)(W.u.)=0.48 7
2+ 0.42 ps 3    1440.05 10 [E2] B(E2)(W.u.)=2.13 16
  1539.19 3+     1457.23 4 E2+M1-7.5 10 
  1664.82 4+     1398.00 6 M1(+E2)-2.5 +10-25 
  1706.71 3+     1624.87 12 M1+E2+0.75 +25-10 
  1825.9 12+ 1.39 ps 9     492.9 5 [E2] 0.0134B(E2)(W.u.)=282 19, α=0.0134
  1878.70 2+     1796.85 15 M1+E2-1.5 +8-70 
  2443.5 1+     2361.5 5 [M1] B(M1)(W.u.)=0.014 9
1+     2443.5 5 M1 B(M1)(W.u.)=0.033 8
  2556.56 1-     2474.5 3 [E1] B(E1)(W.u.)=0.0021 3
1-     2556.6 3 E1 B(E1)(W.u.)=9.4E-4 10
E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
  2618.03 1-     2536.08 15 [E1] B(E1)(W.u.)=0.0017 4
1-     2617.92 20 E1 B(E1)(W.u.)=0.0010 1
  2743.7 1-     2661.7 5 [E1] B(E1)(W.u.)=0.0014 2
1-     2743.7 5 E1 B(E1)(W.u.)=7.4E-4 6
  2825.3 1-     2743.3 5 [E1] B(E1)(W.u.)=7.1E-4 16
1-     2825.3 5 E1 B(E1)(W.u.)=3.5E-4 8
  2842.8 1-     2761.1 5 [E1] B(E1)(W.u.)=8.5E-4 16
1-     2842.6 4 E1 B(E1)(W.u.)=5.6E-4 7
  2882.0 1-     2800.0 5 [E1] B(E1)(W.u.)=3.4E-4 16
1-     2882.0 5 E1 B(E1)(W.u.)=2.5E-4 8
  2907.3 1+     2825.3 5 [M1] B(M1)(W.u.)=0.019 6
1+     2907.3 5 M1 B(M1)(W.u.)=0.033 7
  3091.5 1+     3009.5 5 [M1] B(M1)(W.u.)=0.045 6
1+     3091.5 5 M1 B(M1)(W.u.)=0.084 8
  3117.0 1+     3035.0 5 [M1] B(M1)(W.u.)=0.033 5
1+     3117.0 5 M1 B(M1)(W.u.)=0.058 7
  3193.42 1+     3111.2 5 [M1] B(M1)(W.u.)=0.092 9
1+     3193.4 5 M1 B(M1)(W.u.)=0.150 11
  3371.1 1+     3289.1 5 [M1] B(M1)(W.u.)=0.019 7
1+     3371.1 5 M1 B(M1)(W.u.)=0.027 7
  3492.4 1+     3410.4 5 [M1] B(M1)(W.u.)=0.008 5
1+     3492.4 5 M1 B(M1)(W.u.)=0.018 7
  3621.7 1+     3539.7 5 [M1] B(M1)(W.u.)=0.019 8
1+     3621.7 5 M1 B(M1)(W.u.)=0.036 11
  3826.7 1-     3744.7 5 [E1] B(E1)(W.u.)=0.0012 3
1-     3826.7 5 E1 B(E1)(W.u.)=4.5E-4 9
E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
  6465.2 1- 4.3 fs 21    5025 3 [E1] B(E1)(W.u.)=8.E-6 7
1- 4.3 fs 21    5263 3 E1 B(E1)(W.u.)=1.0E-5 5
1- 4.3 fs 21    5287 3 E1 B(E1)(W.u.)=1.1E-5 7
1- 4.3 fs 21    5366 3 E1 B(E1)(W.u.)=6.E-5 3
1- 4.3 fs 21    5544 3 E1 B(E1)(W.u.)=1.0E-5 6
1- 4.3 fs 21    6383 3 E1+M20.081 18B(E1)(W.u.)=5.E-5 3, B(M2)(W.u.)=0.04 3
1- 4.3 fs 21    6465 3 E1 B(E1)(W.u.)=8.E-5 4

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ STABLE The change in the nuclear charge radius between 152Sm and 154Sm can given by either |l or Δ<r2> where |l = Δ<r2> + c1 Δ<r4> + c2 Δ<r6>. |l=0.219 fm2 10 with the corresponding values Δ<r2>=0.231 fm2 11, Δ<r4>=0.00187 fm4 9, and Δ<r6>=0.0000126 fm6 7 from 1990Wa25. Other values: |l=0.221 13 (1973Le16), 0.220 11 (1981Ne01) and 0.222 11 (1997Ji06) and Δ<r2>=0.215 16 (1974He28), 0.250 14 (1979Po04 as quoted in 1983La06), 0.230 12 (1980Br15), 0.230 (1985Al06), 0.226 12 (1987Bo58), and 0.222 (1990En01). Other: 1989GaZO, 1995Ne12, and 1996La03. Δ<r2> for the neutron distribution is 0.27 4 1983Ja06).
E(level): The change in the nuclear charge radius between 152Sm and 154Sm can given by either |l or Δ<r2> where |l = Δ<r2> + c1 Δ<r4> + c2 Δ<r6>. |l=0.219 fm2 10 with the corresponding values Δ<r2>=0.231 fm2 11, Δ<r4>=0.00187 fm4 9, and Δ<r6>=0.0000126 fm6 7 from 1990Wa25. Other values: |l=0.221 13 (1973Le16), 0.220 11 (1981Ne01) and 0.222 11 (1997Ji06) and Δ<r2>=0.215 16 (1974He28), 0.250 14 (1979Po04 as quoted in 1983La06), 0.230 12 (1980Br15), 0.230 (1985Al06), 0.226 12 (1987Bo58), and 0.222 (1990En01). Other: 1989GaZO, 1995Ne12, and 1996La03. Δ<r2> for the neutron distribution is 0.27 4 1983Ja06). Kπ=0+ ground-state band.
    81.9812+ 3.02 ns 4  Q=-1.87 4, μ=+0.78 4
The isomer shift is Δ<r2>=0.0008 fm2 5 (1974Ka38) and 0.0012 fm2 9 [computed from Δ<r2>/<r2>(0) of 1970Wh02 and <r2>(0) of 1979Po04].
E(level): The isomer shift is Δ<r2>=0.0008 fm2 5 (1974Ka38) and 0.0012 fm2 9 [computed from Δ<r2>/<r2>(0) of 1970Wh02 and <r2>(0) of 1979Po04]. Kπ=0+ ground-state band.
   266.8174+ 172 ps 4  Q=-2.2 8, μ=+1.35 15
E(level): Kπ=0+ ground-state band.
   544.106+ 22.7 ps 6  μ=+1.90 28
E(level): Kπ=0+ ground-state band.
   902.758+ 5.9 ps 3  μ=2.8 4
E(level): Kπ=0+ ground-state band.
   921.3451- 21 fs 1  E(level): Kπ=0- octupole-vibrational band.
  1012.403- 23 fs 3  B(E3)=0.10 2
E(level): Kπ=0- octupole-vibrational band.
  1099.260+ 0.90 ps 21  XREF: γ(1117).
E(level): First excited Kπ=0+ band. α=13.60 keV, B=-84 eV, computed.
  1177.8122+ > 2.4 ps E(level): First excited Kπ=0+ band. α=13.60 keV, B=-84 eV, computed.
  1181.265-   E(level): Kπ=0- octupole-vibrational band.
  1202.440+   XREF: γ(1218).
E(level): Second excited Kπ=0+ band. α=14.18 keV, B=-35 eV, computed.
  1286.292+   XREF: γ(1299).
E(level): Second excited Kπ=0+ band. α=14.18 keV, B=-35 eV, computed.
  1333.010+ 2.45 ps 12  μ=3.2 8
E(level): Kπ=0+ ground-state band.
  1337.604+   E(level): First excited Kπ=0+ band. α=13.60 keV, B=-84 eV, computed.
  1430.937-   E(level): Kπ=0- octupole-vibrational band.
  1440.042+ 0.42 ps 3  E(level): Kπ=2+ γ-vibrational band.
  1472.16(4+)   E(level): Second excited Kπ=0+ band. α=14.18 keV, B=-35 eV, computed.
  1475(6+)   E(level): Proposed as a member of a band by 1992Mo20 in Coul. ex., but the existence of the suggested bandhead (at 1371~keV) is questionable, and the band characteristics are not otherwise clear.
  1475.811-   E(level): Kπ=1- octupole-vibrational band.
  1515.182-   XREF: C(1522).
E(level): Kπ=1- octupole-vibrational band.
  1539.193+   XREF: C(1547).
E(level): Kπ=2+ γ-vibrational band.
  15776+   E(level): First excited Kπ=0+ band. α=13.60 keV, B=-84 eV, computed.
  1584.503-   E(level): Kπ=1- octupole-vibrational band.
  1660.654-   E(level): Kπ=1- octupole-vibrational band.
  1664.824+   E(level): Kπ=2+ γ-vibrational band.
E(level)Jπ(level)T1/2(level)Comments
  1741(8+)   E(level): Proposed as a member of a band by 1992Mo20 in Coul. ex., but the existence of the suggested bandhead (at 1371~keV) is questionable, and the band characteristics are not otherwise clear.
  17609-   E(level): Kπ=0- octupole-vibrational band.
  1774.315-   E(level): Kπ=1- octupole-vibrational band.
  1804.995+   E(level): Kπ=2+ γ-vibrational band.
  1825.912+ 1.39 ps 9  E(level): Kπ=0+ ground-state band.
  1974(6+)   E(level): Kπ=2+ γ-vibrational band.
  2013.4   XREF: C(2012).
  2015.40(1-,2+)   XREF: α(?).
  2069(10+)   E(level): Proposed as a member of a band by 1992Mo20 in Coul. ex., but the existence of the suggested bandhead (at 1371~keV) is questionable, and the band characteristics are not otherwise clear.
  2069.07(2+)   XREF: α(?).
  2139.82(1,2+)   XREF: α(?).
  2154.37+   E(level): Kπ=2+ γ-vibrational band.
  216311-   E(level): Kπ=0- octupole-vibrational band.
  2232.8   XREF: α(?).
  2373.014+   E(level): Kπ=0+ ground-state band.
  2439(12+)   E(level): Proposed as a member of a band by 1992Mo20 in Coul. ex., but the existence of the suggested bandhead (at 1371~keV) is questionable, and the band characteristics are not otherwise clear.
  263613-   E(level): Kπ=0- octupole-vibrational band.
  2793(14+)   E(level): Proposed as a member of a band by 1992Mo20 in Coul. ex., but the existence of the suggested bandhead (at 1371~keV) is questionable, and the band characteristics are not otherwise clear.
  2968.216+   E(level): Kπ=0+ ground-state band.
  3609.318+   E(level): Kπ=0+ ground-state band.
  4295.720+   E(level): Kπ=0+ ground-state band.
  5027.922+   E(level): Kπ=0+ ground-state band.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   921.345   921.33M(γ): From γ(θ) and linear polarization measurements in (γ,γ’) (1976Me17).
  1181.26   637.14E(γ): Multiply placed with intensity suitably divided
I(γ): Multiply placed with intensity suitably divided
  1430.93   528.8E(γ): Multiply placed with intensity suitably divided
I(γ): Multiply placed with intensity suitably divided
  1440.04  1440.05E(γ): Multiply placed with intensity suitably divided
I(γ): Multiply placed with intensity suitably divided
  1475.81  1393.83E(γ): Multiply placed with intensity suitably divided
I(γ): Multiply placed with intensity suitably divided
  1660.65  1393.83E(γ): Multiply placed with intensity suitably divided
I(γ): Multiply placed with intensity suitably divided
  1673.90   752.57I(γ): From (n,n’γ); Iγ=121 from 154Pm β- decay (1.73 m).
  1706.71  1440.05E(γ): Multiply placed with intensity suitably divided
I(γ): Multiply placed with intensity suitably divided
  1804.99  1538.1M(γ): From (n,n’γ), δ=0.00~2 or -9~2 (2006De19).
  1815.04   528.8E(γ): From 2006De19, (n,n’γ).. Multiply placed with intensity suitably divided
I(γ): Multiply placed with intensity suitably divided
   637.14E(γ): From 2006De19, (n,n’γ).. Multiply placed with intensity suitably divided
I(γ): Multiply placed with intensity suitably divided
  1733.11M(γ): From 2006De19 (n,n’γ)
  1878.70   956.9E(γ): From (n,n’γ). From 154Pm β- decay (2.68~min), a questionable γ with Eγ=958.1 4IS shown.
I(γ): From Iγ(956.9γ)/Iγ(1796.8γ) in (n,n’γ) and Iγ(1796.8γ). from 154Pm β- decay (2.68~min), Iγ|<12, but γ is shown as questionable.
  1922.05   909.7E(γ): From 154Pm β- decay (2.68~min). γ not reported by 2006De19 in (n,n’γ).
I(γ): From Iγ(909.7γ)/Iγ(1655γ) in 154Pm β- decay (2.68~min) and Iγ(1655γ).
  1945.61   933.5E(γ): γ not reported by 2006De19, (n,n’γ).
  1863.3I(γ): From Iγ(1863γ)/Iγ(1024γ) in (n,n’γ) and Iγ(1024γ). In 154Pm β- decay (1.73~min), Iγ|<150.
  1986.59    64.548M(γ): From αK(exp) in 154Pm β- decay (2.68 m).
   107.896M(γ): From αK(exp) in 154Pm β- decay (2.68 m).
   171.6M(γ): From αK(exp) in 154Pm β- decay (2.68 m).
  2015.40  2015.5E(γ): Multiply placed with undivided intensity
I(γ): Multiply placed with undivided intensity
  2139.82   166.06M(γ): From αK(exp) in 154Pm β- decay (1.73 m).
  2196.2  1096.9E(γ): The existence and placement of this γ are doubtful.
  2443.5  2443.5M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  2556.56  2556.6I(γ): From (γ,γ’); other: Iγ(2556)/Iγ(2474)=0.74 from 154Pm β- decay (1.73 m).
M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  2618.03  2617.92I(γ): From (γ,γ’); other: Iγ(2617)/Iγ(2536)=0.76 from 154Pm β- decay (1.73 m).
M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
E(level)E(gamma)Comments
  2743.7  2743.7M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  2778.63  2697.4I(γ): From 154Pm β- decay (1.73 m); other: |< 17 from (γ,γ’).
  2825.3  2825.3M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  2842.8  2842.6I(γ): From (γ,γ’); other: Iγ(2761)/Iγ(2842)=0.87 from 154Pm β- decay (1.73 m).
M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  2882.0  2882.0M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  2907.3  2907.3M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3091.5  3091.5M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3117.0  3117.0M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3193.42  2015.5E(γ): Multiply placed with undivided intensity
I(γ): Multiply placed with undivided intensity
  3111.2E(γ): Simple average of 3111.4 5 (γ,γ’) and 3110.9 5 (154Pm β- decay (1.73 m)).
  3193.4E(γ): From (γ,γ’); γ not reported in 154Pm β- decay (1.73 m).
I(γ): Computed from Iγ(3111) and Iγ(3111)/Iγ(3193)=0.57 4 (from (γ,γ’)).
M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3339.5  3339.5M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3365.9  3365.9M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3371.1  3371.1M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3426.4  3426.4M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3492.4  3492.4M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3621.7  3621.7M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3745.8  3745.8M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3759.8  3759.8M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3801.3  3801.3M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3826.7  3826.7M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3836.7  3836.7M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  3844.0  3844.0M(γ): From γ(θ) and γ-branching considerations in (γ,γ’) (1993Zi05)
  6465.2  5263M(γ): From γ(θ) in (γ,γ’) (1977Be05) together with the observation that the transition involves a change of parity.
  5287M(γ): From γ(θ) in (γ,γ’) (1977Be05) together with the observation that the transition involves a change of parity.
  5366M(γ): From γ(θ) in (γ,γ’) (1977Be05) together with the observation that the transition involves a change of parity.
  5544M(γ): Multipolarity is not consistent with Jπ’s of 1- to 1-.. From γ(θ) in (γ,γ’) (1977Be05) together with the observation that the transition involves a change of parity.
  6383M(γ): From γ(θ) in (γ,γ’) (1977Be05) together with the observation that the transition involves a change of parity.
  6465M(γ): From γ(θ) and linear polarization in (γ,γ’).

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