ADOPTED LEVELS, GAMMAS for 149Eu

Authors: Balraj Singh and Jun Chen |  Citation: Nucl. Data Sheets 185, 2 (2022) |  Cutoff date: 23-Aug-2022 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-1314 keV 4S(n)= 8215 keV 11S(p)= 4394 keV 4Q(α)= 2401 keV 5
Reference: 2021WA16

References:
  A  149Gd ε decay (9.28 d)  B  139La(13C,3nγ)
  C  145Nd(7Li,3nγ),146Nd(6Li,3nγ)  D  148Sm(p,p),(p,p’),(p,n) IAR
  E  148Sm(3He,d)  F  148Sm(α,t)
  G  149Sm(d,2nγ)  H  149Sm(3He,t) IAS
  I  150Sm(p,2nγ)  J  150Sm(d,3nγ)
  K  151Eu(p,t)  L  152Sm(p,4nγ)

General Comments:

149Eu produced and identified by 1951Ho30, 1953Ma17 and 1959An36, followed by later studies of its decay.

Mass measurements (Penning-trap method): 2001Bo59, 2000Be42, 1997Be63

Hyperfine structure and isotope shift measurements: 2000Tr07, 1997En08

2018Qu01: theory: calculated low-energy levels, Jπ, S(2n), B(E2), spectroscopic quadrupole moments, dominant configurations using microscopic core-quasiparticle coupling (CQC), and five-dimensional collective (5DCH) Hamiltonians, based on α(p)-PK1 energy density functional.

2017No07, 2016No13: theory: calculated single-particle energies, occupation probabilities of single-particle orbitals, levels, Jπ, B(E2), B(M1), electric quadrupole and magnetic dipole moments using Interacting boson fermion model (IBFM)

1994Jo09: theory: analyzed high-spin levels, octupole correlations and strengths.

1988Al19: theory: calculated levels, magnetic dipole moment, quadrupole moment, B(E2), isotope shifts using interacting boson model.

1982Sc19: theory: calculated levels, B(l), magnetic dipole moment, quadrupole moments, spectroscopic factors using interacting boson-fermion model.

Other theoretical studies: consult the NSR database at www.nndc.bnl.gov/nsr/ for 17 references for structure and one for radioactive decay listed under ’document records’ which can be accessed through web retrieval of the ENSDF database at www.nndc.bnl.gov/ensdf/

Levels: The high-spin sequences are discussed by 1994Ur01 in 139La(13C,3nγ) in terms of multi-particle states coupled to even-even core and to octupole-phonon vibrations. The octupole correlations for some of the bands are suggested by presence of interband E1 and E3 transitions.

Q-value: Q(ε)=695 4, S(2n)=15039 4, S(2p)=11977 4 (2021Wa16)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
      0.0ABC EFG IJKL 5/2+ 93.1 d 4 
% ε = 100
     
    149.732 5 ABC EFG IJKL 7/2+ 0.32 ns 2     149.730 10 
  100
M1+E2
      0.0
5/2+
    458 4     EF       1/2+        
    459.826 8 A    FG I  L (3/2,5/2)+      459.819 10 
  100
M1(+E2)
      0.0
5/2+
    496.389 6 ABC EFG IJ L 11/2- 2.45 µs 5     346.650 10 
   496.385 10 
  100.0 6 
    6.988 35 
M2+E3
E3
    149.732
      0.0
7/2+
5/2+
    534.296 5 AB    G IJKL 7/2+      384.539 10 
   534.294 10 
    2.44 6 
  100.0 8 
D
M1(+E2)
    149.732
      0.0
7/2+
5/2+
    666.291 6 ABC   G IJKL 9/2+      132.004 10 
   516.550 10 
   666.289 10 
    3.35 18 
  100.0 14 
   32.46 23 
M1
M1+E2
E2
    534.296
    149.732
      0.0
7/2+
7/2+
5/2+
    691.8 3 ?        I    (3/2,5/2,7/2)      232.0
  100
D
    459.826
(3/2,5/2)+
    748.602 6 A   E G IJ L 7/2-       82.33 8 
   214.275 13 
   252.210 10 
   598.89 5 
   748.604 10 
    0.064 12 
    2.36 5 
    3.28 7 
    0.243 17 
  100.0 12 
[E1]
(E1)
E2

E1+M2
    666.291
    534.296
    496.389
    149.732
      0.0
9/2+
7/2+
11/2-
7/2+
5/2+
    754 3           K  5/2+        
    767 4     EF       1/2+        
    776.69 10 A         K  (3/2 TO 9/2)      776.69 10 
  100

      0.0
5/2+
    795.030 7 ABC   G IJ L 9/2-      128.74 2 
   260.736 10 
   298.633 10 
   645.315 10 
   794.7?
    0.133 9 
    4.66 5 
  100.0 5 
    5.27 3 
   <0.0035
E1+M2
E1
M1+E2
E1

    666.291
    534.296
    496.389
    149.732
      0.0
9/2+
7/2+
11/2-
7/2+
5/2+
    798.934 15 AB    G IJKL (9/2+)      264.66 4 
   302.58 3 ?
   649.11 7 
   798.91 2 
   77 9 
   25 4 
   27 5 
  100 4 
(M1)



    534.296
    496.389
    149.732
      0.0
7/2+
11/2-
7/2+
5/2+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
    812.631 7 A   EFG I KL 5/2+      278.31 3 
   352.80 2 
   662.902 10 
   812.630 10 
   28 4 
   14.5 10 
  100.0 17 
   52.5 9 
[M1,E2]
[M1,E2]
M1(+E2)
M1,E2
    534.296
    459.826
    149.732
      0.0
7/2+
(3/2,5/2)+
7/2+
5/2+
    875.939 10 A   EFG   KL 5/2+      127.1?
   341.65 5 
   416.08 3 
   726.21 1 
   875.91 4 
   <0.95
   50.2 35 
   15.4 5 
   52.4 16 
  100.0 16 
[E1]
[M1,E2]
[M1,E2]
M1(+E2)
M1(+E2)
    748.602
    534.296
    459.826
    149.732
      0.0
7/2-
7/2+
(3/2,5/2)+
7/2+
5/2+
    910.88 3 ABC   G IJ L 11/2+      244.55 6 
   761.12 5 
   20.5 8 
  100 3 
D
E2
    666.291
    149.732
9/2+
7/2+
    913 3     E     K  3/2+,5/2+        
    933.120 8 A     G I KL (9/2)+      138.10 1 
   184.51 1 
   266.91 7 
   398.82 1 
   436.62 17 
   783.45 10 ?
   933.06 7 
   12.7 9 
    7.8 3 
    3.9 11 
    7.18 18 
    3.3 5 
    1.24 16 
  100.0 8 
(E1+M2)
(E1+M2)
(M1,E2)
[M1,E2]


E2
    795.030
    748.602
    666.291
    534.296
    496.389
    149.732
      0.0
9/2-
7/2-
9/2+
7/2+
11/2-
7/2+
5/2+
    935 3     EF    K  (1/2+)        
    938.609 6 A     G I KL 7/2+      125.98 1 
   139.74 8 
   189.7?
   272.320 10 
   404.299 10 
   478.78 2 
   788.875 10 
   938.616 10 
    2.00 4 
    0.19 2 
   <0.03
   44.0 7 
    2.69 3 
    2.80 4 
  100.0 10 
   33.1 3 
M1,E2

[E1]
M1+E2
M1,E2
E2(+M1)
M1+E2
M1+E2
    812.631
    798.934
    748.602
    666.291
    534.296
    459.826
    149.732
      0.0
5/2+
(9/2+)
7/2-
9/2+
7/2+
(3/2,5/2)+
7/2+
5/2+
    952.667 18 A            (3/2+:9/2+)      418.56 21 
   492.88 6 
   802.93 2 
   952.65 4 
   11.5 14 
   39.7 27 
  100 4 
   26.3 25 




    534.296
    459.826
    149.732
      0.0
7/2+
(3/2,5/2)+
7/2+
5/2+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
    955 3           K  5/2+        
    992.203 10 A            (3/2+:9/2+)      842.29 10 ?
   992.201 10 
   16.5 15 
  100.0 27 


    149.732
      0.0
7/2+
5/2+
    994.79 6  BC   G IJ L (15/2)-      498.45 6 
  100
E2
    496.389
11/2-
   1012.594 10 A     G      (5/2,7/2,9/2)      213.39 8 ?
   478.27 10 
   552.761 16 
   862.862 12 
  1012.61 2 
    5.1 11 
   27 5 
  100.0 28 
   76.8 11 
   26.0 8 


(E2(+M1))


    798.934
    534.296
    459.826
    149.732
      0.0
(9/2+)
7/2+
(3/2,5/2)+
7/2+
5/2+
   1059.68 22  BC        L (9/2-,11/2,13/2-)      264.6 3 
  100

    795.030
9/2-
   1064 3           K  (5/2+)        
   1097.590 10 A     G I    (9/2)-      186.67 4 
   349.04 10 
   431.297 12 
   563.49 10 
   601.201 15 
   947.858 19 
  1097.54
    1.02 8 
    6.9 7 
    7.37 15 
    1.11 11 
    6.17 13 
  100.0 15 
   <0.2
[E1]
[M1,E2]
E1

(M1)
E1

    910.88
    748.602
    666.291
    534.296
    496.389
    149.732
      0.0
11/2+
7/2-
9/2+
7/2+
11/2-
7/2+
5/2+
   1135 4     EF              
   1150 3           K  5/2+        
   1165.04 3 A            (5/2,7/2,9/2)     1015.30 3 
  100

    149.732
7/2+
   1177.32 6  B    G I  L (13/2-)      117.6
   182.7 1 
   382.5 3 
   680.88 6 
    9 3 
   28 3 
   22 6 
  100 4 

D

D+Q
   1059.68
    994.79
    795.030
    496.389
(9/2-,11/2,13/2-)
(15/2)-
9/2-
11/2-
   1184.53 7  B    G   KL (11/2+)      385.7 1 
   518.5
   650.1 1 
   76 4 
   50 17 
  100 4 
D


    798.934
    666.291
    534.296
(9/2+)
9/2+
7/2+
   1207.72 3 A         K  (5/2,7/2,9/2)      673.43 3 
  1207.70 7 
  100 13 
   34 3 


    534.296
      0.0
7/2+
5/2+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   1220.56 10 A   EF    K  5/2+      421.59 18 
  1220.57 12 
  100 15 
   22.2 14 


    798.934
      0.0
(9/2+)
5/2+
   1231.253 9 A            9/2-      436.24 3 
   482.640 12 
   734.86 1 
  1081.58 3 
  1231.2 2 
   34.5 15 
   58.7 11 
  100.0 23 
   14.1 5 
    0.27 8 
(M1)
M1(+E2)
M1(+E2)

[M2]
    795.030
    748.602
    496.389
    149.732
      0.0
9/2-
7/2-
11/2-
7/2+
5/2+
   1246.41 5 A            (5/2,7/2,9/2)     1096.68 5 
  1246.38 8 
   79 7 
  100 5 


    149.732
      0.0
7/2+
5/2+
   1294 3           K         
   1312 4     EF    K  5/2+        
   1333.57 7  B    G I  L (13/2+)      149.2
   422.67 7 
   667.1 5 
   33 8 
   75 25 
  100 25 

D

   1184.53
    910.88
    666.291
(11/2+)
11/2+
9/2+
   1356 3           K         
   1398 4     EF       1/2+        
   1440 4     EF    K  1/2+        
   1471.75 20  B    G      (13/2+)      287.2
   672.9
   57 29 
  100 29 

Q
   1184.53
    798.934
(11/2+)
(9/2+)
   1495 4     EF       3/2+,5/2+        
   1503.5 3      FG   K  (11/2-)      708.5 3 
  100

    795.030
9/2-
   1529.05 8  BC   G    L (15/2)+      351.7 2 
   534.27 6 
   48 6 
  100 7 
D
E1
   1177.32
    994.79
(13/2-)
(15/2)-
   1538 4     EF       1/2+        
   1550 3           K         
   1595 4     E               
   1610.13 11  BC   G IJ L (19/2)-      615.15 12 
  100
E2
    994.79
(15/2)-
   1625 4     E               
   1655 4     E               
   1659.47 8  BC   G    L (15/2+)      325.6 5 
   748.60 7 
   27 13 
  100 27 

Q
   1333.57
    910.88
(13/2+)
11/2+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   1680 4     E               
   1718 4 ?     F       (7/2+,9/2+)        
   1743.8 6  B           (15/2+)      410
   833
  100 25 
   50 13 


   1333.57
    910.88
(13/2+)
11/2+
   1752 4     E               
   1764.62 13  B    G    L (17/2-)      154.2 2 
   235.8
   587.7
   769.9 2 
   45 17 
   25 8 
   50 17 
  100 25 



(M1+E2)
   1610.13
   1529.05
   1177.32
    994.79
(19/2)-
(15/2)+
(13/2-)
(15/2)-
   1819 4     EF              
   1833.9 3  B           (15/2+)      362.2
   500
   649
   80 40 
   60 20 
  100 40 



   1471.75
   1333.57
   1184.53
(13/2+)
(13/2+)
(11/2+)
   1857 4     E               
   1890 4     EF              
   1898.97 24 ? B           (17/2+)      371?
   904.3
   60 20 
  100 20 


   1529.05
    994.79
(15/2)+
(15/2)-
   1945 4     E               
   1998.48 21  B           (17/2+)      339.2
   664.8
   40 20 
  100 40 

(Q)
   1659.47
   1333.57
(15/2+)
(13/2+)
   1999.40 16  BC   G    L (19/2)+      234.7
   389.3 2 
   470.4 5 
   20 2 
   55 4 
  100 7 
D
E1
E2
   1764.62
   1610.13
   1529.05
(17/2-)
(19/2)-
(15/2)+
   2029 4     E               
   2060 4     E               
   2062.60 24  B           (17/2+)      228.7
   319
   729.0
  100 40 
  100 40 
  100 40 



   1833.9
   1743.8
   1333.57
(15/2+)
(15/2+)
(13/2+)
   2092 4     E               
   2118 4     E               
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   2144 4     E               
   2168 4     E               
   2180.84 20  B           (19/2-)      570.8
  1186.2
   78 33 
  100 22 
(M1)
(Q)
   1610.13
    994.79
(19/2)-
(15/2)-
   2199 4     E               
   2247.0 6  B           (19/2+)      184
   503
   588
  100 40 
   80 40 
   80 40 



   2062.60
   1743.8
   1659.47
(17/2+)
(15/2+)
(15/2+)
   2335.78 18  BC   G    L (23/2)-      725.6 2 
  100
E2
   1610.13
(19/2)-
   2342.75 20  BC        L (21/2)+      343.5
   444.0
   732.2 3 
   21 5 
    8 3 
  100 11 
M1+E2

D
   1999.40
   1898.97
   1610.13
(19/2)+
(17/2+)
(19/2)-
   2396.27 25  B           (19/2+)      334
   398
   736.7
   43 14 
   57 14 
  100 29 


(Q)
   2062.60
   1998.48
   1659.47
(17/2+)
(17/2+)
(15/2+)
   2453.40 22  B           (21/2-)      454.0
   689.0
   80 40 
  100 40 


   1999.40
   1764.62
(19/2)+
(17/2-)
   2497.10 20  BC        L (23/2)-      161.5
   316.5
   886.8 3 
    4.4 9 
    3.5 9 
  100 4 
D+Q

(E2)
   2335.78
   2180.84
   1610.13
(23/2)-
(19/2-)
(19/2)-
   2562.16 20  BC        L (23/2)+      109.0
   219
   226.3
   562.6 3 
    3.1 15 
    2.3 8 
    4.6 15 
  100 6 


E1
E2
   2453.40
   2342.75
   2335.78
   1999.40
(21/2-)
(21/2)+
(23/2)-
(19/2)+
   2576.84 19  BC   G  J L (25/2)-       79.9
   241.0 1 
    0.74 25 
  100 3 

D
   2497.10
   2335.78
(23/2)-
(23/2)-
   2609.1 3  B           (21/2+)      212.8
   362
   610.7
  100 33 
   50 17 
   83 50 
D+Q


   2396.27
   2247.0
   1998.48
(19/2+)
(19/2+)
(17/2+)
   2752.10 22  BC      J L (27/2)-      174.9 3 
   255.1
   416.5
  100 3 
    9.2 14 
    0.8 3 
M1(+E2)
E2

   2576.84
   2497.10
   2335.78
(25/2)-
(23/2)-
(23/2)-
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   2828.16 21  B           (25/2)+      266.0
   485.4
   492.4
   39 7 
   23 4 
  100 3 
M1+E2
(Q)
E1
   2562.16
   2342.75
   2335.78
(23/2)+
(21/2)+
(23/2)-
   3144.02 24  B           (27/2)-      316.0
   808.3
    8.1 16 
  100 10 

E2
   2828.16
   2335.78
(25/2)+
(23/2)-
   3218.90 25  B           (27/2)+      390.6
   656.7
    4.8 16 
  100 10 

E2
   2828.16
   2562.16
(25/2)+
(23/2)+
   3249.16 24  B           (29/2)+       30.3
   105.1
   421.0
   497.0
 
    3.2 8 
   65 3 
  100 9 

D
E2
(E1)
   3218.90
   3144.02
   2828.16
   2752.10
(27/2)+
(27/2)-
(25/2)+
(27/2)-
   3427.8 3  B           (31/2)-      675.7
  100
E2
   2752.10
(27/2)-
   3442.6 3  B           (29/2)-      865.8
  100
E2
   2576.84
(25/2)-
   3542.6 3  B           (31/2)+      293.3
   323.5
  100 4 
    4.7 14 
M1
(Q)
   3249.16
   3218.90
(29/2)+
(27/2)+
   3616.3 3  B           (33/2)+       73.2
   188.7
   367.3
 
  100 8 
   55 6 

E1
E2
   3542.6
   3427.8
   3249.16
(31/2)+
(31/2)-
(29/2)+
   3950.6 3  B           (31/2-)      806.8
  100
(Q)
   3144.02
(27/2)-
   3991.6 4  B           (31/2+)      772.7
  100
(Q)
   3218.90
(27/2)+
   4099.9 4  B           (33/2+)      850.7
  100
(E2)
   3249.16
(29/2)+
   4188.5 4  B           (35/2)-      760.7
  100
E2
   3427.8
(31/2)-
   4222.5 4  B           (35/2)+      680.0
  100
E2
   3542.6
(31/2)+
   4271.6 5  B           (33/2-)      829.0
  100
(Q)
   3442.6
(29/2)-
   4359.8 4  B           (37/2)+      137.4
   171.4
   743.3
    3.0 12 
    3.5 12 
  100 6 


E2
   4222.5
   4188.5
   3616.3
(35/2)+
(35/2)-
(33/2)+
   4404.3 4  B           (33/2-)      961.8
  100
(Q)
   3442.6
(29/2)-
   4422.4 4  B           (33/2-)      979.8
  100
(Q)
   3442.6
(29/2)-
   4684.6 3  B           (35/2-)      262.2
   280.3
   496
   733.8
  1256.9
   50 17 
   33 8 
   42 17 
  100 25 
   58 25 




(Q)
   4422.4
   4404.3
   4188.5
   3950.6
   3427.8
(33/2-)
(33/2-)
(35/2)-
(31/2-)
(31/2)-
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   4705.3 4  B           (35/2)      755.1
  1277.0
  100 40 
  100 40 


   3950.6
   3427.8
(31/2-)
(31/2)-
   4970.0 5  B           (39/2)+      747.5
  100
E2
   4222.5
(35/2)+
   4995.3 5  B           (37/2+)      895.4
  100
(Q)
   4099.9
(33/2+)
   5049.8 5  B           (41/2)+      690.0
  100
E2
   4359.8
(37/2)+
   5070.2 5  B           (35/2,37/2,39/2-)      385.6
  100

   4684.6
(35/2-)
   5168.0 5  B           (37/2)      979.5
  100
D+Q
   4188.5
(35/2)-
   5338.2 5  B           (39/2)     1149.7
  100
(Q)
   4188.5
(35/2)-
   5373.9 5 ? B           (39/2-)      689.3
  100

   4684.6
(35/2-)
   5538.6 6  B           (45/2)+      488.8
  100
E2
   5049.8
(41/2)+
   5607.8 5  B           (39/2)     1419.3
  100
(Q)
   4188.5
(35/2)-
   5963.4 6  B           (41/2)      356
   795.4
    9 3 
  100 13 

(Q)
   5607.8
   5168.0
(39/2)
(37/2)
   6030.2 11 ? B           (43/2)      692
  100

   5338.2
(39/2)
   6289.1 6  B           (47/2)      750.4
  100
D+Q
   5538.6
(45/2)+
   6809.4 6  B           (49/2)     1270.8
  100

   5538.6
(45/2)+
   6996.8 7  B           (51/2)      187.5
   707.7
   24 8 
  100 24 

(E2)
   6809.4
   6289.1
(49/2)
(47/2)
   7027.6 7  B           (45/2,47/2,49/2+)     1489.0
  100

   5538.6
(45/2)+
   7684.1 7  B           (55/2)      687.3
  100
(Q)
   6996.8
(51/2)
  14287   D         (7/2-) 102 keV      
  14635   D         (3/2-)        
  14804   D         (3/2-) ≈ 50 keV      
  15002   D         (1/2-,3/2-)        
  15310   D         (1/2-,3/2-)        
  15449   D         (5/2-)        
  15787   D                

E(level): From a least-squares fit to Eγ data for levels populated in γ-studies, assuming ΔEγ=0.3 keV for Eγ values quoted to tenth of a keV and 1 keV otherwise, where not available. For levels known only from particle transfer reactions, weighted averages have been taken where more than one value is available

Jπ(level): Above 1250, for levels populated in in-beam γ-ray studies (generally J>11/2), together with supporting γ(θ), γγ(θ) (DCO ratios) and γ(lin pol) data, ascending spins are assumed as as the excitation energy increases (which is consistent with the decay pattern of the levels). Also, probable band assignments are used in several cases where angular data do not give unique values.

Back to top

Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - πh11/2~#(148Sm core).
    496.389 6  11/2- 2.45 µs 5       
    994.79 6  (15/2)-      498.45 6 
  100
E2
    496.389
11/2-
   1610.13 11  (19/2)-        
   2335.78 18  (23/2)-      725.6 2 
  100
E2
   1610.13
(19/2)-
   3144.02 24  (27/2)-      316.0
   808.3
    8.1 16 
  100 10 

E2
   2828.16
   2335.78
(25/2)+
(23/2)-
   3950.6 3  (31/2-)      806.8
  100
(Q)
   3144.02
(27/2)-
   4684.6 3  (35/2-)      262.2
   280.3
   496
   733.8
  1256.9
   50 17 
   33 8 
   42 17 
  100 25 
   58 25 




(Q)
   4422.4
   4404.3
   4188.5
   3950.6
   3427.8
(33/2-)
(33/2-)
(35/2)-
(31/2-)
(31/2)-
   5373.9 5 ? (39/2-)      689.3
  100

   4684.6
(35/2-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - πd5/2~#(150Gd core)
      0.0 5/2+ 93.1 d 4 
% ε = 100
     
    534.296 5  7/2+      384.539 10 
   534.294 10 
    2.44 6 
  100.0 8 
D
M1(+E2)
    149.732
      0.0
7/2+
5/2+
    798.934 15  (9/2+)        
   1184.53 7  (11/2+)      385.7 1 
   518.5
   650.1 1 
   76 4 
   50 17 
  100 4 
D


    798.934
    666.291
    534.296
(9/2+)
9/2+
7/2+
   1471.75 20  (13/2+)      287.2
   672.9
   57 29 
  100 29 

Q
   1184.53
    798.934
(11/2+)
(9/2+)
   1833.9 3  (15/2+)      362.2
   500
   649
   80 40 
   60 20 
  100 40 



   1471.75
   1333.57
   1184.53
(13/2+)
(13/2+)
(11/2+)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - Sequence based on 149.7, 7/2+ level. The 149.7, 7/2+ level is interpreted by 1994Ur01 with configuration of πg7/2~#(150Gd core)
    149.732 5  7/2+ 0.32 ns 2       
    666.291 6  9/2+      132.004 10 
   516.550 10 
   666.289 10 
    3.35 18 
  100.0 14 
   32.46 23 
M1
M1+E2
E2
    534.296
    149.732
      0.0
7/2+
7/2+
5/2+
    910.88 3  11/2+        
   1333.57 7  (13/2+)      149.2
   422.67 7 
   667.1 5 
   33 8 
   75 25 
  100 25 

D

   1184.53
    910.88
    666.291
(11/2+)
11/2+
9/2+
   1659.47 8  (15/2+)      325.6 5 
   748.60 7 
   27 13 
  100 27 

Q
   1333.57
    910.88
(13/2+)
11/2+
   1743.8 6  (15/2+)      410
   833
  100 25 
   50 13 


   1333.57
    910.88
(13/2+)
11/2+
   1998.48 21  (17/2+)      339.2
   664.8
   40 20 
  100 40 

(Q)
   1659.47
   1333.57
(15/2+)
(13/2+)
   2062.60 24  (17/2+)      228.7
   319
   729.0
  100 40 
  100 40 
  100 40 



   1833.9
   1743.8
   1333.57
(15/2+)
(15/2+)
(13/2+)
   2247.0 6  (19/2+)      184
   503
   588
  100 40 
   80 40 
   80 40 



   2062.60
   1743.8
   1659.47
(17/2+)
(15/2+)
(15/2+)
   2396.27 25  (19/2+)        
   2609.1 3  (21/2+)        
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 4 - Decoupled πh11/2 band
    795.030 7  9/2-        
   1177.32 6  (13/2-)      117.6
   182.7 1 
   382.5 3 
   680.88 6 
    9 3 
   28 3 
   22 6 
  100 4 

D

D+Q
   1059.68
    994.79
    795.030
    496.389
(9/2-,11/2,13/2-)
(15/2)-
9/2-
11/2-
   1764.62 13  (17/2-)        
   2453.40 22  (21/2-)      454.0
   689.0
   80 40 
  100 40 


   1999.40
   1764.62
(19/2)+
(17/2-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 5 - πh11/2~#(3-) octupole band #1
   1529.05 8  (15/2)+        
   1999.40 16  (19/2)+      234.7
   389.3 2 
   470.4 5 
   20 2 
   55 4 
  100 7 
D
E1
E2
   1764.62
   1610.13
   1529.05
(17/2-)
(19/2)-
(15/2)+
   2562.16 20  (23/2)+        
   3218.90 25  (27/2)+      390.6
   656.7
    4.8 16 
  100 10 

E2
   2828.16
   2562.16
(25/2)+
(23/2)+
   3991.6 4  (31/2+)      772.7
  100
(Q)
   3218.90
(27/2)+
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 6 - πh11/2~#(3-) octupole band #2
   1898.97 24  (17/2+)        
   2342.75 20  (21/2)+      343.5
   444.0
   732.2 3 
   21 5 
    8 3 
  100 11 
M1+E2

D
   1999.40
   1898.97
   1610.13
(19/2)+
(17/2+)
(19/2)-
   2828.16 21  (25/2)+        
   3249.16 24  (29/2)+       30.3
   105.1
   421.0
   497.0
 
    3.2 8 
   65 3 
  100 9 

D
E2
(E1)
   3218.90
   3144.02
   2828.16
   2752.10
(27/2)+
(27/2)-
(25/2)+
(27/2)-
   4099.9 4  (33/2+)      850.7
  100
(E2)
   3249.16
(29/2)+
   4995.3 5  (37/2+)      895.4
  100
(Q)
   4099.9
(33/2+)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 7 - πh11/2~#ν(h9/2f7/2)8+.
   2752.10 22  (27/2)-        
   3427.8 3  (31/2)-      675.7
  100
E2
   2752.10
(27/2)-
   4188.5 4  (35/2)-        
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 8 - Multi-particle band based on 31/2+
   3542.6 3  (31/2)+        
   3616.3 3  (33/2)+       73.2
   188.7
   367.3
 
  100 8 
   55 6 

E1
E2
   3542.6
   3427.8
   3249.16
(31/2)+
(31/2)-
(29/2)+
   4222.5 4  (35/2)+        
   4359.8 4  (37/2)+      137.4
   171.4
   743.3
    3.0 12 
    3.5 12 
  100 6 


E2
   4222.5
   4188.5
   3616.3
(35/2)+
(35/2)-
(33/2)+
   4970.0 5  (39/2)+      747.5
  100
E2
   4222.5
(35/2)+
   5049.8 5  (41/2)+      690.0
  100
E2
   4359.8
(37/2)+
   5538.6 6  (45/2)+      488.8
  100
E2
   5049.8
(41/2)+
   6289.1 6  (47/2)      750.4
  100
D+Q
   5538.6
(45/2)+
   6809.4 6  (49/2)     1270.8
  100

   5538.6
(45/2)+
   6996.8 7  (51/2)        
   7684.1 7  (55/2)        

Back to top

Additional Gamma Data:















E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
    149.732 7/2+ 0.32 ns 2     149.730 10 M1+E20.14 30.587B(E2)(W.u.)=6.1 +29-24, B(M1)(W.u.)=0.0127 8, α=0.587 8
    459.826 (3/2,5/2)+      459.819 10 M1(+E2)0.4 LT0.0281α=0.0281 9
    496.389 11/2- 2.45 µs 5     346.650 10 M2+E3-0.075 250.2326B(E3)(W.u.)=2.7 +21-15, B(M2)(W.u.)=0.0686 14, α=0.2326 33
11/2- 2.45 µs 5     496.385 10 E3 0.0392B(E3)(W.u.)=2.71 6, α=0.0392 5
    534.296 7/2+      534.294 10 M1(+E2)0.4 LT0.0192α=0.0192 6
    666.291 9/2+      132.004 10 M1 0.837α=0.837 12
9/2+      516.550 10 M1+E20.75 +27-240.0182α=0.0182 14
9/2+      666.289 10 E2 0.00649α=0.00649 9
    748.602 7/2-       82.33 8 [E1] 0.479α=0.479 7
7/2-      214.275 13 (E1) 0.0365α=0.0365 5
7/2-      252.210 10 E2 0.1006α=0.1006 14
7/2-      748.604 10 E1+M2+0.041 130.00194α=0.00194 4
    795.030 9/2-      128.74 2 E1+M20.18 60.36α=0.36 16
9/2-      260.736 10 E1 0.02189α=0.02189 31
9/2-      298.633 10 M1+E2+0.15 20.0884α=0.0884 13
9/2-      645.315 10 E1 0.00259α=0.00259 4
    798.934 (9/2+)      264.66 4 (M1) 0.1229α=0.1229 17
    812.631 5/2+      278.31 3 [M1,E2] 0.090α=0.090 17
5/2+      352.80 2 [M1,E2] 0.046α=0.046 11
5/2+      662.902 10 M1(+E2)0.85 LT0.0105α=0.0105 10
5/2+      812.630 10 M1,E2 0.0055α=0.0055 14
    875.939 5/2+      127.1[E1] 0.1483α=0.1483 21
5/2+      341.65 5 [M1,E2] 0.051α=0.051 12
5/2+      416.08 3 [M1,E2] 0.030α=0.030 8
5/2+      726.21 1 M1(+E2)0.65 LT0.0086α=0.0086 6
5/2+      875.91 4 M1(+E2)0.3 LT0.00573α=0.00573 13
E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
    910.88 11/2+      761.12 5 E2 0.00476α=0.00476 7
    933.120 (9/2)+      138.10 1 (E1+M2)0.18 40.29α=0.29 8
(9/2)+      184.51 1 (E1+M2)0.25 50.17α=0.17 4
(9/2)+      266.91 7 (M1,E2) 0.102α=0.102 18
(9/2)+      398.82 1 [M1,E2] 0.033α=0.033 8
(9/2)+      933.06 7 E2 0.00303α=0.00303 4
    938.609 7/2+      125.98 1 M1,E2 1.01α=1.01 5
7/2+      189.7[E1] 0.0504α=0.0504 7
7/2+      272.320 10 M1+E20.33 +12-80.1104α=0.1104 29
7/2+      404.299 10 M1,E2 0.032α=0.032 8
7/2+      478.78 2 E2(+M1)4 GT0.0153α=0.0153 4
7/2+      788.875 10 M1+E2-5 20.00451α=0.00451 20
7/2+      938.616 10 M1+E21.0 +10-50.0040α=0.0040 6
    994.79 (15/2)-      498.45 6 E2 0.01349α=0.01349 19
   1012.594 (5/2,7/2,9/2)      552.761 16 (E2(+M1))0.4 GT0.0137α=0.0137 34
   1097.590 (9/2)-      186.67 4 [E1] 0.0526α=0.0526 7
(9/2)-      349.04 10 [M1,E2] 0.048α=0.048 12
(9/2)-      431.297 12 E1 0.00633α=0.00633 9
(9/2)-      601.201 15 (M1) 0.01468α=0.01468 21
(9/2)-      947.858 19 E1 1.20×10-3α=1.20×10-3 2
   1231.253 9/2-      436.24 3 (M1) 0.0331α=0.0331 5
9/2-      482.640 12 M1(+E2)2 LT0.021α=0.021 4
9/2-      734.86 1 M1(+E2)2 LT0.0074α=0.0074 15
9/2-     1231.2 2 [M2] 0.00617α=0.00617 9
   1529.05 (15/2)+      534.27 6 E1 0.00389α=0.00389 5
E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
   1610.13 (19/2)-      615.15 12 E2 0.00788α=0.00788 11
   1764.62 (17/2-)      769.9 2 (M1+E2) 0.0063α=0.0063 17
   1999.40 (19/2)+      389.3 2 E1 0.00807α=0.00807 11
(19/2)+      470.4 5 E2 0.01576α=0.01576 23
   2180.84 (19/2-)      570.8(M1) 0.01672α=0.01672 23
   2335.78 (23/2)-      725.6 2 E2 0.00531α=0.00531 7
   2342.75 (21/2)+      343.5M1+E2 0.050α=0.050 11
   2497.10 (23/2)-      886.8 3 (E2) 0.00338α=0.00338 5
   2562.16 (23/2)+      226.3E1 0.0316α=0.0316 4
(23/2)+      562.6 3 E2 0.00985α=0.00985 14
   2752.10 (27/2)-      174.9 3 M1(+E2) 0.360α=0.360 22
(27/2)-      255.1E2 0.0970α=0.0970 14
   2828.16 (25/2)+      266.0M1+E2 0.103α=0.103 18
(25/2)+      492.4E1 0.00467α=0.00467 7
   3144.02 (27/2)-      808.3E2 0.00415α=0.00415 6
   3218.90 (27/2)+      656.7E2 0.00672α=0.00672 9
   3249.16 (29/2)+      421.0E2 0.02139α=0.02139 30
(29/2)+      497.0(E1) 0.00457α=0.00457 6
   3427.8 (31/2)-      675.7E2 0.00628α=0.00628 9
   3442.6 (29/2)-      865.8E2 0.00357α=0.00357 5
   3542.6 (31/2)+      293.3M1 0.0934α=0.0934 13
   3616.3 (33/2)+      188.7E1 0.0511α=0.0511 7
(33/2)+      367.3E2 0.0316α=0.0316 4
   4099.9 (33/2+)      850.7(E2) 0.00371α=0.00371 5
   4188.5 (35/2)-      760.7E2 0.00476α=0.00476 7
E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
   4222.5 (35/2)+      680.0E2 0.00619α=0.00619 9
   4359.8 (37/2)+      743.3E2 0.00502α=0.00502 7
   4970.0 (39/2)+      747.5E2 0.00496α=0.00496 7
   5049.8 (41/2)+      690.0E2 0.00598α=0.00598 8
   5538.6 (45/2)+      488.8E2 0.01421α=0.01421 20
   6996.8 (51/2)      707.7(E2) 0.00563α=0.00563 8

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      0.05/2+ 93.1 d 4 
% ε = 100
μ=+3.565 6 (1985Ah02,2019StZV), Q=+0.75 2 (1985Ah02,2021StZZ)
δ<r2>(151Eu,149Eu)=-0.302 fm2 21 (1985Al06, also 1983Al14, 1984Al35 and 1986Al33). See 1992He21 for systematics of root-mean square charge radii.
E(level): δ<r2>(151Eu,149Eu)=-0.302 fm2 21 (1985Al06, also 1983Al14, 1984Al35 and 1986Al33). See 1992He21 for systematics of root-mean square charge radii. πd5/2~#(150Gd core).
    496.38911/2- 2.45 µs 5  μ=+7.0 3 (1980Kl07,2020StZV)
Configuration=πh11/2.
E(level): πh11/2~#(148Sm core).
    534.2967/2+   E(level): πd5/2~#(150Gd core).
    795.0309/2-   E(level): Decoupled πh11/2 band.
    798.934(9/2+)   E(level): πd5/2~#(150Gd core).
    935(1/2+)   XREF: F(929).
    994.79(15/2)-   E(level): πh11/2~#(148Sm core).
   1177.32(13/2-)   E(level): Decoupled πh11/2 band.
   1184.53(11/2+)   XREF: K(1190).
E(level): πd5/2~#(150Gd core).
   1207.72(5/2,7/2,9/2)   XREF: K(1212).
   1220.565/2+   XREF: K(1226).
   1471.75(13/2+)   E(level): πd5/2~#(150Gd core).
   1529.05(15/2)+   E(level): πh11/2~#(3-) octupole band #1.
   1610.13(19/2)-   E(level): πh11/2~#(148Sm core).
   1764.62(17/2-)   E(level): Decoupled πh11/2 band.
   1833.9(15/2+)   E(level): πd5/2~#(150Gd core).
   1898.97(17/2+)   E(level): πh11/2~#(3-) octupole band #2.
   1999.40(19/2)+   E(level): πh11/2~#(3-) octupole band #1.
   2247.0(19/2+)   19/2+ band member is 2247 or 2396 level.
   2335.78(23/2)-   E(level): πh11/2~#(148Sm core).
   2342.75(21/2)+   E(level): πh11/2~#(3-) octupole band #2.
   2453.40(21/2-)   E(level): Decoupled πh11/2 band.
   2562.16(23/2)+   E(level): πh11/2~#(3-) octupole band #1.
   2752.10(27/2)-   E(level): πh11/2~#ν(h9/2f7/2)8+.
   2828.16(25/2)+   E(level): πh11/2~#(3-) octupole band #2.
E(level)Jπ(level)T1/2(level)Comments
   3144.02(27/2)-   E(level): πh11/2~#(148Sm core).
   3218.90(27/2)+   E(level): πh11/2~#(3-) octupole band #1.
   3249.16(29/2)+   E(level): πh11/2~#(3-) octupole band #2.
   3427.8(31/2)-   E(level): πh11/2~#ν(h9/2f7/2)8+.
   3542.6(31/2)+   E(level): Multi-particle band based on 31/2+.
   3616.3(33/2)+   E(level): Multi-particle band based on 31/2+.
   3950.6(31/2-)   E(level): πh11/2~#(148Sm core).
   3991.6(31/2+)   E(level): πh11/2~#(3-) octupole band #1.
   4099.9(33/2+)   E(level): πh11/2~#(3-) octupole band #2.
   4188.5(35/2)-   E(level): πh11/2~#ν(h9/2f7/2)8+.
   4222.5(35/2)+   E(level): Multi-particle band based on 31/2+.
   4359.8(37/2)+   E(level): Multi-particle band based on 31/2+.
   4684.6(35/2-)   E(level): πh11/2~#(148Sm core).
   4970.0(39/2)+   E(level): Multi-particle band based on 31/2+.
   4995.3(37/2+)   E(level): πh11/2~#(3-) octupole band #2.
   5049.8(41/2)+   E(level): Multi-particle band based on 31/2+.
   5373.9(39/2-)   E(level): πh11/2~#(148Sm core).
   5538.6(45/2)+   E(level): Multi-particle band based on 31/2+.
   6289.1(47/2)   E(level): Multi-particle band based on 31/2+.
   6809.4(49/2)   E(level): Multi-particle band based on 31/2+.
   6996.8(51/2)   E(level): Multi-particle band based on 31/2+.
   7684.1(55/2)   E(level): Multi-particle band based on 31/2+.
  14287(7/2-) 102 keV Γ from 1967Jo04.
  14804(3/2-) ≈ 50 keV Γ from 1967Jo04.

Back to top

Additional Gamma Comments:

E(level)E(gamma)Comments
    534.296    384.539I(γ): others: 27 7 in (13C,3nγ) and 9 1 (p,2nγ) seems discrepant
    666.291    132.004I(γ): others: 25 12 in (13C,3nγ) and 6.3 16 in (d,2nγ)
    666.289I(γ): others: 45 1 in (d,2nγ), 87 25 in (13C,3nγ)
    798.934    798.91M(γ): (M2) proposed by 1996Vy02 in 149Gd ε decay
    812.631    812.630I(γ): from 149Gd ε. Value of 16 4 in (d,2nγ) is too low
    910.88    244.55I(γ): from (d,2nγ) and (d,3nγ). Iγ=77 18 in (13C,3nγ); 59 5 (p,2nγ) seem too high. This γ is not reported in ε decay, probably because it is too weak to be detected
    761.12I(γ): from (d,2nγ)
   1012.594    213.39E(γ): poor fit.
    862.862M(γ): (M2) assignment is suspect since it is inconsistent with ΔJ=0,1 which would favor E1 over M2
   1059.68    264.6E(γ): from (p,4nγ)
   1177.32    182.7E(γ): from (d,2nγ)
I(γ): weighted average of 25.0 94 from (13C,3nγ), 28.9 11 from (d,2nγ), 17.6 44 from (p,2nγ), and 22.4 78 from (p,4nγ)
   1333.57    422.67E(γ): from (d,2nγ)
    667.1E(γ): from (p,4nγ)
   1503.5    708.5E(γ): from (d,2nγ)
   1529.05    351.7E(γ): from (d,2nγ)
    534.27E(γ): from (d,2nγ)
   1610.13    615.15E(γ): weighted average of 614.9 2 from (6Li,3nγ), 615.05 8 from (d,2nγ), 615.50 15 from (d,3nγ), and 615.4 2 from (p,4nγ)
   1659.47    325.6E(γ): from (d,2nγ)
    748.60E(γ): from (d,2nγ)
   1764.62    154.2E(γ): from (d,2nγ)
I(γ): weighted average of 33 17 from (13C,3nγ) and 59 19 from (p,4nγ)
    769.9E(γ): from (d,2nγ)
   1999.40    389.3E(γ): from (d,2nγ)
    470.4E(γ): from (p,4nγ)
   2335.78    725.6E(γ): weighted average of 725.1 3 from (6Li,3nγ), 725.9 2 from (d,2nγ), and 725.6 3 from (p,4nγ)
   2342.75    732.2E(γ): from (6Li,3nγ)
E(level)E(gamma)Comments
   2497.10    886.8E(γ): from (6Li,3nγ)
   2562.16    562.6E(γ): from (6Li,3nγ)
   2576.84    241.0E(γ): from (d,2nγ)
   2752.10    174.9E(γ): from (6Li,3nγ)

Back to top