ADOPTED LEVELS, GAMMAS for 148Tb

Author: N. Nica |  Citation: Nucl. Data Sheets 208, 1 (2026) |  Cutoff date: 17-Jan-2026 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-2678 keV 10S(n)= 7866 keV 15S(p)= 2469 keV 13Q(α)= 2657 keV 16
Reference: 2021WA16

References:
  A  148Dy ε decay  B  152Ho α decay (49.8 S)
  C  152Ho α decay (161.8 S)  D  (HI,xnγ)

General Comments:

Mass measurement (Penning trap): 2000Be42

Q-value: S(2n)=18920 50, S(2p)=7997 14 (2021Wa16)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
      0.0A CD 2- 60 m 1 
% ε = 100
     
     90.1 3  B D 9+ 2.20 m 5 
% ε = 100
     
    109.62 20 A CD 4- 80 ns 4     109.6 2 
  100
E2
      0.0
2-
    178.43 16 A CD 2+ 7.0 ns 6     178.4 2 
  100
E1
      0.0
2-
    195.6 4 A CD 3-       85.8
  100
M1
    109.62
4-
    280.80 32 A CD 3+      102.5
  100
M1
    178.43
2+
    328.4 8  B D 7+ 4.5 ns 4     237.8 2 
  100
E2
     90.1
9+
    351.3 6    D 5+      241.7
  100
E1
    109.62
4-
    375.2 6    D 4+       94.4
  100
M1
    280.80
3+
    406.5 8  B D 8+ ≤ 0.7 ns     78.1
   315.9 2 
 
 
M1
M1
    328.4
     90.1
7+
9+
    426.1 7    D 6+       74.4
    97.8
 
 
M1
M1
    351.3
    328.4
5+
7+
    620.242 10 A    1+ ≤ 0.25 ns    339.6
   442.0
   620.24 1 
    0.04
    0.13
  100

(M1)
E1
    280.80
    178.43
      0.0
3+
2+
2-
    657.78 34 A    (3-)      462.1
   657.8
   65
  100
(M1)
(M1)
    195.6
      0.0
3-
2-
    794.79 25 A    (1-,2-)      136.9
   616.2
   794.9
   62
    5
  100
(M1)

(M1)
    657.78
    178.43
      0.0
(3-)
2+
2-
    950.60 27 A    (2-,1-)      156.0
   772.0
   950.8
    3
    3
  100


(M1)
    794.79
    178.43
      0.0
(1-,2-)
2+
2-
   1096.7 9    D 11- 22 ns 1     690.2
  1006.2
 
 
[E3]
M2+E3
    406.5
     90.1
8+
9+
   1220.4 7    D (5-)      793.9
   869.5
 
 


    426.1
    351.3
6+
5+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   1246.2 8    D (6-)      820.1
   917.9
 
 


    426.1
    328.4
6+
7+
   1247.27 34 A    1+      627
  1068.9
  1247.2
    4.7
    5.3
  100


E1
    620.242
    178.43
      0.0
1+
2+
2-
   1249.0 10    D 9-      842.5
  100
E1
    406.5
8+
   1267.8 10    D (10+)     1177.2
  100

     90.1
9+
   1276.6 5 A    1     1097
  1276.9
    5.3
  100


    178.43
      0.0
2+
2-
   1295.3 9    D (8-)      888.7
   967.1
 
 


    406.5
    328.4
8+
7+
   1305.5 13    D (7-)      899
  100

    406.5
8+
   1332.7 5 A    1(-)     1332.7
  100

      0.0
2-
   1366.1 4 A    1(+)     1085.4
  1187.5
  1366
  100
   75
   50



    280.80
    178.43
      0.0
3+
2+
2-
   1380.8 9    D 12-      284.1 2 
  100
M1
   1096.7
11-
   1484.6 9    D (10+)     1078.2
  1394.0
 
 


    406.5
     90.1
8+
9+
   1642.44 32 A    1(-),0(-)      691.9
   847.1
  1642.9
  100
   47
    5.9



    950.60
    794.79
      0.0
(2-,1-)
(1-,2-)
2-
   1653.9 9    D (7+,8+)     1228
  1247.7
  1563.0
 
 
 



    426.1
    406.5
     90.1
6+
8+
9+
   1723.7 9    D (9+)     1317.4
  1395.3
  1633
 
 
 



    406.5
    328.4
     90.1
8+
7+
9+
   1828.5 5 A    1     1547
  1650.2
   25
  100


    280.80
    178.43
3+
2+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   1840.47 32 A    0-,1      890.0
  1045.9
  1840.1
   86
  100
   21



    950.60
    794.79
      0.0
(2-,1-)
(1-,2-)
2-
   2362.6 10    D      981.7
  100

   1380.8
12-
   2714.9 9    D 14-     1334.1 3 
  100
E2
   1380.8
12-
   2869.5 11    D      506.7
  100

   2362.6

   2954.9 10    D (15)-      240.0 2 
  100
M1+E2
   2714.9
14-
   3168.9 10    D (16)-      214.1 2 
   454.1 3 
  100 10 
   16 4 
M1+E2
Q
   2954.9
   2714.9
(15)-
14-
   3368.3 10    D      498.7
  100

   2869.5

   3595.9 10    D (17-)      427.0 2 
   640.8
 
 
[M1+E2]

   3168.9
   2954.9
(16)-
(15)-
   3803.1 10    D (17)-      434.7
   634.2 2 
 
 

[M1+E2]
   3368.3
   3168.9

(16)-
   4179.5 10    D (17)     1010.6
  100

   3168.9
(16)-
   4240.0 10    D (17)     1071.0
  100

   3168.9
(16)-
   4297.0 10    D (18)      493.8
   700.8
 
 


   3803.1
   3595.9
(17)-
(17-)
   4424.1 10    D (18-)      184.0
   244.7
   621 1 ?
   828
 
 
 
 




   4240.0
   4179.5
   3803.1
   3595.9
(17)
(17)
(17)-
(17-)
   4506.1 10    D (18)       82.0
  100

   4424.1
(18-)
   4863.6 10    D (18)      566.3
  1060.4
 
 


   4297.0
   3803.1
(18)
(17)-
   4946.6 11    D      522.5 5 
  100

   4424.1
(18-)
   5010.1 10    D (18)     1207.1
  100

   3803.1
(17)-
   5173.6 11    D (18)     1370.6
 

   3803.1
(17)-
   5226.7 10    D (19-)      216.6
   363.0
   720.5
   802.5
   929.4
  1631.0
 
 
 
 
 
 






   5010.1
   4863.6
   4506.1
   4424.1
   4297.0
   3595.9
(18)
(18)
(18)
(18-)
(18)
(17-)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   5315.7 10    D (19)      142.3
   452.0
   809.7
 
 
 



   5173.6
   4863.6
   4506.1
(18)
(18)
(18)
   5559.6 11    D (19)      333.0
  100

   5226.7
(19-)
   5748.4 11    D (20-)      521.6
  100

   5226.7
(19-)
   6491.1 11    D (21+)      742.6
   931.5
  1175.5
 
 
 



   5748.4
   5559.6
   5315.7
(20-)
(19)
(19)
   6524.6 11    D (21)     1208.8
  100

   5315.7
(19)
   6934.7 11    D      443.7
  100

   6491.1
(21+)
   7271.2 11    D (23+)      336.6
   746.6
   780.1
 
 
 



   6934.7
   6524.6
   6491.1

(21)
(21+)
   7343.4 12    D (23-)       71.9
 

   7271.2
(23+)
   7621.9 12    D (24+)      278.4
   350.6
 
 


   7343.4
   7271.2
(23-)
(23+)
   7762.3 12    D (26+)      140.2
   418.7
   491.4
 
 
 



   7621.9
   7343.4
   7271.2
(24+)
(23-)
(23+)
   7835.1 12    D       72.9
  100

   7762.3
(26+)
   8339.4 12    D      504.4
   577.0
 
 


   7835.1
   7762.3

(26+)
   8620.0 12    D (27+) 1.310 µs 7     280.6
   784.8
   857.7
 
 
 



   8339.4
   7835.1
   7762.3


(26+)
   9197.6 13    D      577.4
  100

   8620.0
(27+)
   9578.3 13    D (29)      958.3
  100

   8620.0
(27+)
   9922.2 13    D     1302.3
  100

   8620.0
(27+)
   9973.7 13    D      775.5
  1353.9
 
 


   9197.6
   8620.0

(27+)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  10149.3 13    D      175.3
   227.2
   571.1
   952.0
 
 
 
 




   9973.7
   9922.2
   9578.3
   9197.6


(29)

  10425.8 13    D      847.6
  100

   9578.3
(29)
  10512.9 13    D      934.7
  100

   9578.3
(29)
  10753.8 13    D      328.0
  1175.7
 
 


  10425.8
   9578.3

(29)
  10793.2 13    D     1214.7
  100

   9578.3
(29)
  10881.7 13    D       88.5
  100

  10793.2

  10965.6 13    D      172.3
   452.7
   816.3
 
 
 



  10793.2
  10512.9
  10149.3



  11447.4 13    D      481.8
   565.6
   654.1
   693.7
 
 
 
 




  10965.6
  10881.7
  10793.2
  10753.8




  12117.9 14    D     1152.3
  100

  10965.6

  12344.2 14    D      896.8
  100

  11447.4

  12451.0 14    D     1003.6
  100

  11447.4

  13061.9 15    D      944.0
  100

  12117.9

  13381.3 15    D      930.3
  100

  12451.0

  14092.3 16    D     1030.4
  100

  13061.9

E(level): From a least-squares fit to Eγ data with ΔEγ=0.5 keV for Eγ’s with no assigned uncertainty

Jπ(level): From analysis of γ(θ), α(K)exp, and systematics. For level from (HI,xnγ) dataset spin generally incesases with excitation energy. Where available, assigned configurations were tacitly used together with other arguremtns for Jπ assignments. Starting at 3596 level and above all assignments were postulated by 1995Sc25 in (HI,xnγ) dataset

M(γ): From conversion electron data in ε decay, and γ(θ), DCO ratios, conversion electron and linear-polarization data in (HI,xnγ)

Back to top

Back to top

Additional Gamma Data:















E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
    109.62 4- 80 ns 4     109.6 2 E2 1.865B(E2)(W.u.)=3.37 17, α=1.865 29, α(K)=0.898 13, α(L)=0.745 12, α(M)=0.1766 29, α(N)=0.0396 6, α(O)=0.00515 8, α(P)=4.49E-5 7
    178.43 2+ 7.0 ns 6     178.4 2 E1 0.0636B(E1)(W.u.)=5.7E-6 5, α=0.0636 9, α(K)=0.0537 8, α(L)=0.00776 11, α(M)=0.001687 24, α(N)=0.000386 6, α(O)=5.72E-5 8, α(P)=3.22E-6 5
    195.6 3-       85.8M1 3.41α=3.41 5, α(K)=2.88 4, α(L)=0.420 6, α(M)=0.0918 13, α(N)=0.02122 30, α(O)=0.00327 5, α(P)=0.0002145 30
    280.80 3+      102.5M1 2.046α=2.046 29, α(K)=1.725 24, α(L)=0.2514 35, α(M)=0.0549 8, α(N)=0.01270 18, α(O)=0.001955 27, α(P)=0.0001285 18
    328.4 7+ 4.5 ns 4     237.8 2 E2 0.1297B(E2)(W.u.)=3.15 +31-26, α=0.1297 19, α(K)=0.0934 13, α(L)=0.0282 4, α(M)=0.00650 9, α(N)=0.001471 21, α(O)=0.0002023 29, α(P)=5.55E-6 8
    351.3 5+      241.7E1 0.0287α=0.0287 4, α(K)=0.02429 34, α(L)=0.00344 5, α(M)=0.000747 10, α(N)=0.0001712 24, α(O)=2.56×10-5 4, α(P)=1.507E-6 21
    375.2 4+       94.4M1 2.59α=2.59 4, α(K)=2.185 31, α(L)=0.319 4, α(M)=0.0696 10, α(N)=0.01610 23, α(O)=0.002478 35, α(P)=0.0001628 23
    406.5 8+ ≤ 0.7 ns     78.1M1 4.48α=4.48 6, α(K)=3.77 5, α(L)=0.552 8, α(M)=0.1206 17, α(N)=0.0279 4, α(O)=0.00429 6, α(P)=0.000282 4
8+ ≤ 0.7 ns    315.9 2 M1 0.0906α=0.0906 13, α(K)=0.0766 11, α(L)=0.01091 15, α(M)=0.002379 34, α(N)=0.000550 8, α(O)=8.49×10-5 12, α(P)=5.65E-6 8
    426.1 6+       74.4M1 5.15α=5.15 7, α(K)=4.34 6, α(L)=0.636 9, α(M)=0.1389 19, α(N)=0.0321 4, α(O)=0.00494 7, α(P)=0.000324 5
6+       97.8M1 2.341α=2.341 33, α(K)=1.974 28, α(L)=0.288 4, α(M)=0.0629 9, α(N)=0.01454 20, α(O)=0.002238 31, α(P)=0.0001471 21
    620.242 1+ ≤ 0.25 ns    442.0(M1) 0.0376α=0.0376 5, α(K)=0.0319 4, α(L)=0.00449 6, α(M)=0.000978 14, α(N)=0.0002261 32, α(O)=3.49×10-5 5, α(P)=2.334E-6 33
1+ ≤ 0.25 ns    620.24 1 E1 0.00308α=0.00308 4, α(K)=0.00263 4, α(L)=0.000354 5, α(M)=7.65×10-5 11, α(N)=1.762E-5 25, α(O)=2.69E-6 4, α(P)=1.735E-7 24
    657.78 (3-)      462.1(M1) 0.0335α=0.0335 5, α(K)=0.0284 4, α(L)=0.00400 6, α(M)=0.000871 12, α(N)=0.0002013 28, α(O)=3.11×10-5 4, α(P)=2.081E-6 29
(3-)      657.8(M1) 0.01373α=0.01373 19, α(K)=0.01167 16, α(L)=0.001620 23, α(M)=0.000352 5, α(N)=8.15×10-5 11, α(O)=1.260E-5 18, α(P)=8.48E-7 12
    794.79 (1-,2-)      136.9(M1) 0.898α=0.898 13, α(K)=0.758 11, α(L)=0.1100 15, α(M)=0.02402 34, α(N)=0.00555 8, α(O)=0.000855 12, α(P)=5.64×10-5 8
(1-,2-)      794.9(M1) 0.00860α=0.00860 12, α(K)=0.00732 10, α(L)=0.001009 14, α(M)=0.0002193 31, α(N)=5.07×10-5 7, α(O)=7.85E-6 11, α(P)=5.30E-7 7
    950.60 (2-,1-)      950.8(M1) 0.00557α=0.00557 8, α(K)=0.00474 7, α(L)=0.000650 9, α(M)=0.0001410 20, α(N)=3.26×10-5 5, α(O)=5.05E-6 7, α(P)=3.42E-7 5
   1096.7 11- 22 ns 1    1006.2M2+E32.2 60.0072α=0.0072 7, α(K)=0.0059 6, α(L)=0.00098 7, α(M)=0.000218 15, α(N)=5.03×10-5 35, α(O)=7.6E-6 6, α(P)=4.4E-7 5
   1247.27 1+     1247.2E1 0.000842α=0.000842 12, α(K)=0.000684 10, α(L)=8.92×10-5 12, α(M)=1.923E-5 27, α(N)=4.44E-6 6, α(O)=6.84E-7 10, α(P)=4.59E-8 6
   1249.0 9-      842.5E1 1.65×10-3α=1.65×10-3 2, α(K)=0.001413 20, α(L)=0.0001874 26, α(M)=4.05E-5 6, α(N)=9.33E-6 13, α(O)=1.432E-6 20, α(P)=9.42E-8 13
   1380.8 12-      284.1 2 M1 0.1202α=0.1202 17, α(K)=0.1017 14, α(L)=0.01452 21, α(M)=0.00317 4, α(N)=0.000732 10, α(O)=0.0001130 16, α(P)=7.50×10-6 11
   2714.9 14-     1334.1 3 E2 1.65×10-3α=1.65×10-3 2, α(K)=0.001375 19, α(L)=0.0001921 27, α(M)=4.18E-5 6, α(N)=9.63E-6 13, α(O)=1.476E-6 21, α(P)=9.51E-8 13
   2954.9 (15)-      240.0 2 M1+E2+0.09 20.1889α=0.1889 27, α(K)=0.1595 23, α(L)=0.02301 33, α(M)=0.00502 7, α(N)=0.001161 17, α(O)=0.0001789 25, α(P)=1.179×10-5 17
   3168.9 (16)-      214.1 2 M1+E2 0.22α=0.22 4, α(K)=0.17 5, α(L)=0.037 6, α(M)=0.0084 15, α(N)=0.00191 32, α(O)=0.000274 30, α(P)=1.2×10-5 4
E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
   3595.9 (17-)      427.0 2 [M1+E2] 0.032α=0.032 9, α(K)=0.026 9, α(L)=0.0042 7, α(M)=0.00093 14, α(N)=0.000214 33, α(O)=3.2×10-5 6, α(P)=1.9E-6 7
   3803.1 (17)-      634.2 2 [M1+E2] 0.0115α=0.0115 35, α(K)=0.0097 31, α(L)=0.00144 34, α(M)=0.00031 7, α(N)=7.3×10-5 17, α(O)=1.11E-5 28, α(P)=6.9E-7 24

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      0.02- 60 m 1 
% ε = 100
μ=-1.76 2 (2019StZV,1990Al36), Q=-0.3 2 (2021StZZ,1990Al36)
configuration=πd3/2νf7/2 (1985Kl05).
     90.19+ 2.20 m 5 
% ε = 100
configuration=πh11/2νf7/2 (1987LiZT).
    109.624- 80 ns 4  configuration=πs1/2νf7/2 (1985Kl05).
    178.432+ 7.0 ns 6  configuration=πh11/2νf7/2 (1985Kl05).
    195.63-   configuration=πs1/2νf7/2 (1985Kl05).
    280.803+   configuration=πh11/2νf7/2 (1985Kl05).
    328.47+ 4.5 ns 4  configuration=πh11/2νf7/2 (1987LiZT).
    406.58+ ≤ 0.7 ns configuration=πh11/2νf7/2 (1987LiZT).
    620.2421+ ≤ 0.25 ns configuration=πh11/2νh9/2 (1985Kl05).
    657.78(3-)   configuration=πd-15/2νf7/2 (1985Kl05).
    794.79(1-,2-)   configuration=πd-15/2νf7/2 (1985Kl05).
    950.60(2-,1-)   configuration=πg-17/2νf7/2 (1985Kl05).
   1096.711- 22 ns 1  configuration=(πh11/2νf7/2)9+~#3- (1985Kl05).
   1247.271+   configuration=πd3/2(νf7/2~#3-) (1985Kl05).
   1276.61   configuration=πs1/2(νf7/2~#3-) (1985Kl05).
   1332.71(-)   configuration=πs1/2νp3/2 (1985Kl05).
   1366.11(+)   configuration=πs1/2(νf7/2~#3-) (1985Kl05).
   1380.812-   configuration=πh11/2νi13/2 (1979Br28).
   1642.441(-),0(-)   configuration=πg-17/2νf7/2 (1985Kl05).
   1828.51   configuration=πd-15/2νf7/2 (1985Kl05).
   2714.914-   configuration=(πh211/2νf7/2)27/2 \πd15/2 (1979Br28).
   2954.9(15)-   configuration=(πh211/2νf7/2)27/2 \πd15/2 (1979Br28).
   3168.9(16)-   configuration=(πh211/2νf7/2)27/2 \πg17/2 (1979Br28).
   3595.9(17-)   configuration=(πh211/2νf7/2)27/2 \πg17/2 (1979Br28).

Back to top