ADOPTED LEVELS, GAMMAS for 148Ba

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

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=5164 keV 20S(n)= 5352 keV 20S(p)= 12914 keV 9Q(α)= -3098 keV 6
Reference: 2021WA16

References:
  A  148Cs β- decay  B  248Cm SF decay
  C  252Cf SF decay  D  254Cf SF decay

General Comments:

2020Wu04 compiled for XUNDL database by B. Singh (McMaster)

2020Wu04: 148Ba nuclide produced at the RIBF-RIKEN facility in 9Be(238U,F) reaction at E=345 MeV/nucleon and an intensity of 5pnA. Identification of fission fragments of interest was made based on time-of-flight (tof), magnetic rigidity (Bρ), and energy loss (ΔE) using the BigRIPS spectrometer, determining atomic Z and mass-to-charge ratio α/Q, where Q=charge state of the ions. The separated nuclei were implanted at a rate of 100 ions/s in the β counting system of the Wide range Active Silicon-Strip Stopper Array for Beta and ion detection (WAS3ABi), which included a stack of five Double Sided Silicon Strip Detectors (DSSSDs). The WAS3ABi setup was surrounded by Euroball RIken Cluster Array (EURICA) array of 84 HPGe detectors for γ detection. Half-life of the separated and implanted ions was determined by fitting the time distribution of β(implants)- and/or βγ(implants)-correlated decay curves to the sum of activities of parent nuclei, daughter nuclei, grand-daughter nuclei, β-delayed neutron daughter and grand-daughter nuclei, and a constant background. Comparison of measured half-lives with FRDM+QRPA (2003), FRDM+QRPA (2019), KTUY+GT2, RHB+pn-RQRPA, and DF+CQRPA theoretical calculations.

Q-value: S(2n)=8821.3 23, S(2p)=24168 24, Q(β-n)=1062 11 (2021Wa16)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0ABCD 0+ 0.619 s 13 
% β- = 100
% β-n = 0.4 3
     
   141.71 5 ABCD 2+ 1.51 ns 2     141.76 5 
   100
[E2]
     0.0
0+
   423.10 7 ABC  4+      281.36 5 
   100
E2
   141.71
2+
   687.13 7 A    (1-)      545.5 1 
   687.0 1 
    86.2 7 
   100.0 14 


   141.71
     0.0
2+
0+
   774.81 8 AB   (3-)      351.7 1 
   633.1 1 
    26.6 4 
   100.0 9 


   423.10
   141.71
4+
2+
   808.10 8  BC  6+      385.00 5 
   100
E2
   423.10
4+
   861.01 11 A         719.3 1 
   100

   141.71
2+
   962.6 3 ABC  (5-)      539.7 4 
   100
D
   423.10
4+
   980.30 9 A    (2+,3-)      293.5 3 
   557.1 2 
   838.7 1 
    <5.3
    18.1 11 
   100.0 11 



   687.13
   423.10
   141.71
(1-)
4+
2+
  1049.02 9 A    (2+)      625.6 3 
   907.4 1 
  1048.8 2 
    <5.3
    85.9 22 
   100.0 11 



   423.10
   141.71
     0.0
4+
2+
0+
  1202.08 10 A    (2+,3,4+)      778.4 2 
  1060.4 1 
    <9.4
   100.0 19 


   423.10
   141.71
4+
2+
  1254.84 21 A         567.7 2 
   100

   687.13
(1-)
  1255.93 13  BC  7-      293.0 3 ?
   447.8 1 
    <6
   100 13 

E1
   962.6
   808.10
(5-)
6+
  1265.05 10  BC  8+      456.95 5 
   100
E2
   808.10
6+
  1429.47 16 A    (1-,2,3-)      654.8 2 
   742.2 2 
   100 4 
    89 4 


   774.81
   687.13
(3-)
(1-)
  1494.3 3 A         807.2 3 
   100

   687.13
(1-)
  1522.21 13 A         320.1 4 
   473.0 2 
   747.6 4 
   835.6 4 
  1380.5 2 
   <10
    34.0 20 
   <10
   <10
   100 20 





  1202.08
  1049.02
   774.81
   687.13
   141.71
(2+,3,4+)
(2+)
(3-)
(1-)
2+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  1532.22 12 A    (0+,1,2+)      845.0 2 
  1390.6 2 
  1532.2 2 
    37 6 
    63 6 
   100 6 



   687.13
   141.71
     0.0
(1-)
2+
0+
  1558.57 15 A    (2+,3,4+)      356.2 2 
   509.7 3 
   783.8 3 
  1135.9 3 
    55 9 
   <46
   <46
   100 9 




  1202.08
  1049.02
   774.81
   423.10
(2+,3,4+)
(2+)
(3-)
4+
  1578.97 16 A         377.4 5 
   530.0 3 
   891.6 4 
  1437.2 2 
   <11
    11.1 22 
   <11
   100 5 




  1202.08
  1049.02
   687.13
   141.71
(2+,3,4+)
(2+)
(1-)
2+
  1603.05 18 A         554.4 4 
   622.4 4 
   915.9 2 
   <29
   <29
   100 6 



  1049.02
   980.30
   687.13
(2+)
(2+,3-)
(1-)
  1627.41 18 A         939.8 3 
  1485.9 2 
   <12
   100.0 24 


   687.13
   141.71
(1-)
2+
  1645.23 13  BC  9-      380.2 1 
   389.2 2 
   100 14 
    43 14 
E1

  1265.05
  1255.93
8+
7-
  1683.9 3 A         996.8 3 
   100

   687.13
(1-)
  1697.07 22 A    (1-,2,3-)      922.4 3 
  1009.8 3 
   <36
   100 7 


   774.81
   687.13
(3-)
(1-)
  1727.02 12 A    (0+,1,2+)     1039.9 2 
  1585.3 2 
  1727.0 2 
    82 3 
    74 9 
   100 6 



   687.13
   141.71
     0.0
(1-)
2+
0+
  1732.11 21 A        1309.0 2 
   100

   423.10
4+
  1749.4 3 A    (1-,2,3-)      974.7 4 
  1062.2 4 
   100 8 
   <42


   774.81
   687.13
(3-)
(1-)
  1768.15 14  BC  10+      503.1 1 
   100
E2
  1265.05
8+
  1769.50 18 A        1082.4 2 
  1627.7 3 
   100 5 
   <25


   687.13
   141.71
(1-)
2+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  1783.44 15 A         580.4 4 
   803.7 2 
  1008.0 4 
  1096.4 4 
  1641.3 3 
   <29
   <29
   <29
   <29
   100 6 





  1202.08
   980.30
   774.81
   687.13
   141.71
(2+,3,4+)
(2+,3-)
(3-)
(1-)
2+
  1840.01 25 A        1065.2 4 
  1416.9 3 
   <36
   100 7 


   774.81
   423.10
(3-)
4+
  1872.54 21 A        1185.4 2 
   100

   687.13
(1-)
  1884.05 18 A         903.8 3 
  1742.3 2 
    <9
   100 6 


   980.30
   141.71
(2+,3-)
2+
  1903.62 21 A        1761.9 2 
   100

   141.71
2+
  1911.5 3 A        1488.4 3 
   100

   423.10
4+
  1933.3 3 A        1510.2 3 
   100

   423.10
4+
  1987.26 23 A        1212.2 3 
  1564.4 3 
  <125
   100 25 


   774.81
   423.10
(3-)
4+
  2010.8 3 A        1323.7 3 
   100

   687.13
(1-)
  2021.5 3 A        1879.8 3 
   100

   141.71
2+
  2073.7 4 A        1650.6 4 
   100

   423.10
4+
  2117.64 19  BC  (11-)      349.5 2 
   472.4 2 
    75 25 
   100 25 
D

  1768.15
  1645.23
10+
9-
  2227.2 5 A        1540.1 5 
   100

   687.13
(1-)
  2303.85 24  BC  12+      535.7 2 
   100
E2
  1768.15
10+
  2423.6 3 A        1736.5 3 
   100

   687.13
(1-)
  2557.66 24 A    (0+,1,2+)     2416.0 4 
  2557.6 3 
    85 5 
   100 10 


   141.71
     0.0
2+
0+
  2659.6 3 ? B        542.0 2 
   100

  2117.64
(11-)
  2867.3 4 ? B        563.5 2 
   100

  2303.85
12+

E(level): From least-squares fit to Eγ values

Jπ(level): From DCO ratios, linear polarization, and γγγ(θ) from 248Cm SF decay data which are in agreement with the γγ(θ), γγγ(θ) from 252Cf SF decay data, and systematics for even-even nuclei with A≈150, particularly 146Ba and 150Ba suggested by 2018Li06 in the β- decay datast. Specific arguments are given in comments for levels from β- decay

M(γ): From 248Cm SF decay dataset based on DCO and linear polarization measurements. Fast quadrupole Q, ΔJ=2 in-band transitions are adopted as E2 transitions by the evaluator.

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - g.s. band
     0.0 0+ 0.619 s 13 
% β- = 100
% β-n = 0.4 3
     
   141.71 5  2+ 1.51 ns 2     141.76 5 
   100
[E2]
     0.0
0+
   423.10 7  4+      281.36 5 
   100
E2
   141.71
2+
   808.10 8  6+      385.00 5 
   100
E2
   423.10
4+
  1265.05 10  8+      456.95 5 
   100
E2
   808.10
6+
  1768.15 14  10+      503.1 1 
   100
E2
  1265.05
8+
  2303.85 24  12+      535.7 2 
   100
E2
  1768.15
10+
  2867.3 4       563.5 2 
   100

  2303.85
12+
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - Octupole band
   687.13 7  (1-)        
   774.81 8  (3-)      351.7 1 
   633.1 1 
    26.6 4 
   100.0 9 


   423.10
   141.71
4+
2+
   962.6 3  (5-)      539.7 4 
   100
D
   423.10
4+
  1255.93 13  7-      293.0 3 ?
   447.8 1 
    <6
   100 13 

E1
   962.6
   808.10
(5-)
6+
  1645.23 13  9-      380.2 1 
   389.2 2 
   100 14 
    43 14 
E1

  1265.05
  1255.93
8+
7-
  2117.64 19  (11-)      349.5 2 
   472.4 2 
    75 25 
   100 25 
D

  1768.15
  1645.23
10+
9-
  2659.6 3       542.0 2 
   100

  2117.64
(11-)

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   141.71 2+ 1.51 ns 2     141.76 5 [E2]0.564B(E2)(W.u.)=90.2 14, α=0.564 8, α(K)=0.407 6, α(L)=0.1242 18, α(M)=0.0269 4, α(N)=0.00561 8, α(O)=0.000761 11, α(P)=2.012E-5 28
   423.10 4+      281.36 5 E20.0556α=0.0556 8, α(K)=0.0449 6, α(L)=0.00841 12, α(M)=0.001778 25, α(N)=0.000376 5, α(O)=5.38×10-5 8, α(P)=2.524E-6 35
   808.10 6+      385.00 5 E20.02093α=0.02093 29, α(K)=0.01735 24, α(L)=0.00284 4, α(M)=0.000596 8, α(N)=0.0001267 18, α(O)=1.851×10-5 26, α(P)=1.017E-6 14
  1255.93 7-      447.8 1 E10.00421α=0.00421 6, α(K)=0.00364 5, α(L)=0.000459 6, α(M)=9.40×10-5 13, α(N)=2.021E-5 28, α(O)=3.07E-6 4, α(P)=2.169E-7 30
  1265.05 8+      456.95 5 E20.01269α=0.01269 18, α(K)=0.01062 15, α(L)=0.001643 23, α(M)=0.000343 5, α(N)=7.31×10-5 10, α(O)=1.079E-5 15, α(P)=6.34E-7 9
  1645.23 9-      380.2 1 E10.00626α=0.00626 9, α(K)=0.00540 8, α(L)=0.000686 10, α(M)=0.0001405 20, α(N)=3.02×10-5 4, α(O)=4.58E-6 6, α(P)=3.20E-7 4
  1768.15 10+      503.1 1 E20.00969α=0.00969 14, α(K)=0.00814 11, α(L)=0.001225 17, α(M)=0.000255 4, α(N)=5.45×10-5 8, α(O)=8.08E-6 11, α(P)=4.90E-7 7
  2303.85 12+      535.7 2 E20.00817α=0.00817 11, α(K)=0.00688 10, α(L)=0.001018 14, α(M)=0.0002116 30, α(N)=4.52×10-5 6, α(O)=6.73E-6 9, α(P)=4.16E-7 6

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 0.619 s 13 
% β- = 100
% β-n = 0.4 3
<r2>1/2=4.9731 fm 167 (2013An02).
E(level): g.s. band.
   141.712+ 1.51 ns 2  E(level): g.s. band.
   423.104+   E(level): g.s. band.
   687.13(1-)   E(level): Octupole band.
   774.81(3-)   E(level): Octupole band.
   808.106+   E(level): g.s. band.
   962.6(5-)   E(level): Octupole band.
  1255.937-   E(level): Octupole band.
  1265.058+   E(level): g.s. band.
  1645.239-   E(level): Octupole band.
  1768.1510+   E(level): g.s. band.
  2117.64(11-)   E(level): Octupole band.
  2303.8512+   E(level): g.s. band.
  2659.6   E(level): Octupole band.
  2867.3   E(level): g.s. band.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   141.71   141.76E(γ): From 2020Ur03 in 252Cf SF decay
   423.10   281.36E(γ): From 2020Ur03 in 252Cf SF decay
   808.10   385.00E(γ): From 248Cm SF decay. From 2020Ur03 in 252Cf SF decay
I(γ): From 248Cm SF decay
   962.6   539.7E(γ): unweighted average of 539.3 1 from (β- decay) and 540.1 2 from (248Cm SF decay)
  1255.93   293.0E(γ): From 248Cm SF decay
I(γ): From 248Cm SF decay
   447.8E(γ): From 248Cm SF decay
I(γ): From 248Cm SF decay
  1265.05   456.95E(γ): From 248Cm SF decay. From 2020Ur03 in 252Cf SF decay
I(γ): From 248Cm SF decay
  1429.47   654.8E(γ): From 248Cm SF decay
I(γ): From 248Cm SF decay
   742.2E(γ): From 248Cm SF decay
I(γ): From 248Cm SF decay
  1645.23   380.2E(γ): From 248Cm SF decay
I(γ): From 248Cm SF decay
   389.2E(γ): From 248Cm SF decay
I(γ): From 248Cm SF decay
  1768.15   503.1E(γ): From 248Cm SF decay
I(γ): From 248Cm SF decay
  2117.64   349.5E(γ): From 248Cm SF decay
I(γ): From 248Cm SF decay
   472.4E(γ): From 248Cm SF decay
I(γ): From 248Cm SF decay
  2303.85   535.7E(γ): From 248Cm SF decay
I(γ): From 248Cm SF decay
  2659.6   542.0E(γ): From 248Cm SF decay
I(γ): From 248Cm SF decay
  2867.3   563.5E(γ): From 248Cm SF decay
I(γ): From 248Cm SF decay

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