ADOPTED LEVELS, GAMMAS for 142Ba

Authors: T.D. Johnson, D. Symochko, M. Fadil, and J.K. Tuli |  Citation: Nucl. Data Sheets 112, 1949 (2011) |  Cutoff date: 1-Jun-2010 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=2181 keV 9S(n)= 6181 keV 8S(p)= 10655 keV 11Q(α)= -295 keV 7
Reference: 2012WA38

References:
  A  142Cs β- decay  B  248Cm SF decay

General Comments:

Optical isotope shift: 1997Co26 (with respect to 140Ba,144Ba)

Nuclear structure, calculations, theory: 2007Ji05, 1997Sa16, 1995Hi10, 1995Ba45 (also 1992Eg01,1991Eg01,1990Eg01), 1992Wo11, 1992Na07.

Q-value: Note: Current evaluation has used the following Q record

Q-value: Q(β-n)=-2982 8, Q(εp)=-16937 7 2011AuZZ

Q-value: Values in 2003Au03: Q(β-)=2212 5, S(n)=6169 10, S(p)=10635 12, Q(α)=-100 4, Q(β-n)=-2956 7, Q(εp)=-16790 9










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0.0AB 0+ 10.6 m 2 
% β- = 100
     
   359.596 14 AB 2+ 65 ps 2     359.598 14 
  100
E2
     0.0
0+
   834.81 9 AB 4+ 12.5 ps 8     475.17 9 
  100
E2
   359.596
2+
  1292.20 14 AB (3-)      457.26 15 
   932.82 20 
   20 2 
  100 15 

D+Q
   834.81
   359.596
4+
2+
  1326.48 5 A  1- 10 ps 5     966.89 7 
  1326.46 7 
   69 6 
  100.0 15 
D+(Q)

   359.596
     0.0
2+
0+
  1424.06 6 A  2+ < 9 ps   1064.54 7 
  1423.9 1 
   87 18 
  100 5 
E2+(M1)
Q
   359.596
     0.0
2+
0+
  1465.98 24  B 6+ 7.2 ps 13     631.1 3 
  100
E2
   834.81
4+
  1535.53 7 A  0+ 9 ps 7     209.1 5 
  1175.93 6 
    3.3 3 
  100 2 

Q
  1326.48
   359.596
1-
2+
  1541.57 23  B 5-      249.2
   706.8 3 
 
  100

E1
  1292.20
   834.81
(3-)
4+
  1639.60 10 A  0+ < 16 ps   1280.0 1 
  100
Q
   359.596
2+
  1693.0 3 ?A  2+     1333.4 3 
  100
D+Q
   359.596
2+
  1747.40 23  B 5(+)      205.8 3 
   912.6 3 
   37 9 
  100 14 

(M1)
  1541.57
   834.81
5-
4+
  1781.50 10 A      1421.9 1 
  100
D+(Q)
   359.596
2+
  1848.41 21  B 6+      101.0 3 
   306.9 3 
   382.4 3 
  1013.6 3 
   38 13 
  100 10 
   25 13 
   73 10 
[D+Q]
[E1]

E2
  1747.40
  1541.57
  1465.98
   834.81
5(+)
5-
6+
4+
  1952.7 4  B 7-      411.8 2 
   487.0 3 
   13 2 
  100 11 
[E2]
E1
  1541.57
  1465.98
5-
6+
  2070.1 3  B 7(+)      222.0 2 
   323.2 2 
   603.8 3 
   37 8 
   25 5 
  100 17 
[D+Q]
[E2]
(M1)
  1848.41
  1747.40
  1465.98
6+
5(+)
6+
  2127.9 3 A  0+     1768.3 3 
  100
Q
   359.596
2+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  2159.4 4  B 8+      206.6 2 
   693.4 3 
    2.3 8 
  100
[E1]
E2
  1952.7
  1465.98
7-
6+
  2229.3 3  B 8(+)      159.0 3 
   276.8 3 
   380.9 3 
   763.4 3 
   46 9 
   35 5 
  100 12 
   69 8 
[D+Q]
[E1]
(E2)
(E2)
  2070.1
  1952.7
  1848.41
  1465.98
7(+)
7-
6+
6+
  2341.77 10 A  1     1015.3 1 
  1982.1 2 
  2341.7 5 
   15.9 11 
  100 7 
   15.9 25 

D+(Q)

  1326.48
   359.596
     0.0
1-
2+
0+
  2513.8 4  B 9-      284 1 
   354.3 3 
   560.9 2 
   14 6 
  100 8 
   88 8 
[D+Q]
E1
(E2)
  2229.3
  2159.4
  1952.7
8(+)
8+
7-
  2569.78 11 A      1243.3 1 
  100

  1326.48
1-
  2680.1 4  B (9+)      451.0 3 
   609.8 3 
  100 11 
   84 18 
[D+Q]
[E2]
  2229.3
  2070.1
8(+)
7(+)
  2814.9 4  B (10+)      301.1 3 
   585.7 3 
   655.4 3 
   22 6 
  100 9 
   24 6 
[D]
[E2]
[Q]
  2513.8
  2229.3
  2159.4
9-
8(+)
8+
  2882.57 16 A  (1,2+)     1101.1 2 
  2522.9 4 
  2882.5 3 
   74 22 
   66 10 
  100 9 



  1781.50
   359.596
     0.0

2+
0+
  2925.9 4  B (10+)      412.1 3 
   766.5 3 
   43 9 
  100 13 
[D]
[E2]
  2513.8
  2159.4
9-
8+
  3144.38 23 A  (1)     1818.0 3 
  2784.6 5 
  3144.2 5 
  100 11 
   39 9 
   46 10 



  1326.48
   359.596
     0.0
1-
2+
0+
  3153.9 5  B (11-)      228.0 3 
   640.1 3 
   42 8 
  100 20 
[D]
[E2]
  2925.9
  2513.8
(10+)
9-
  3261.7 4 A  (1)     1935.2 4 
  3261.6 5 
  100 11 
   49 8 


  1326.48
     0.0
1-
0+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  3283.29 19 A  (1)     1956.8 4 
  2923.5 3 
  3283.4 3 
   45 8 
   83 8 
  100 10 



  1326.48
   359.596
     0.0
1-
2+
0+
  3343.0 5  B      662.9 3 
  100

  2680.1
(9+)
  3507.3 5  B      692.4 3 
  100

  2814.9
(10+)
  3573.08 24 A  (1)     2246.1 4 
  3573.3 3 
   60 7 
  100 7 


  1326.48
     0.0
1-
0+
  3794.9 5  B      641.0 3 
   869 1 
  100 50 
   25 15 


  3153.9
  2925.9
(11-)
(10+)
  3932.9 6  B      779.0 3 
  100

  3153.9
(11-)
  4369.3 4 A  (1)     4009.3 7 
  4369.3 4 
   25 7 
  100 9 


   359.596
     0.0
2+
0+
  4517.4 6 ? B      722.5 3 
  100

  3794.9

  5280.4 4 A      2397.8 4 
  2938.6 5 
  100 9 
   17 4 


  2882.57
  2341.77
(1,2+)
1

E(level): Least-squares fit to data from 142Ce β- decay and 248Cm SF decay. Some levels from 252Cf resulting in γ placement not consistent with 248Cm SF decay were not adopted.

Jπ(level): From angular correlation and polarization measurements in 248Cm SF decay, except where noted.

Back to top

Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - GS band.
     0.0 0+ 10.6 m 2 
% β- = 100
     
   359.596 14  2+ 65 ps 2     359.598 14 
  100
E2
     0.0
0+
   834.81 9  4+ 12.5 ps 8     475.17 9 
  100
E2
   359.596
2+
  1465.98 24  6+ 7.2 ps 13     631.1 3 
  100
E2
   834.81
4+
  2159.4 4  8+      206.6 2 
   693.4 3 
    2.3 8 
  100
[E1]
E2
  1952.7
  1465.98
7-
6+
  2925.9 4  (10+)      412.1 3 
   766.5 3 
   43 9 
  100 13 
[D]
[E2]
  2513.8
  2159.4
9-
8+
  3794.9 5       641.0 3 
   869 1 
  100 50 
   25 15 


  3153.9
  2925.9
(11-)
(10+)
  4517.4 6       722.5 3 
  100

  3794.9

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - octupole band
  1292.20 14  (3-)        
  1541.57 23  5-      249.2
   706.8 3 
 
  100

E1
  1292.20
   834.81
(3-)
4+
  1952.7 4  7-      411.8 2 
   487.0 3 
   13 2 
  100 11 
[E2]
E1
  1541.57
  1465.98
5-
6+
  2513.8 4  9-      284 1 
   354.3 3 
   560.9 2 
   14 6 
  100 8 
   88 8 
[D+Q]
E1
(E2)
  2229.3
  2159.4
  1952.7
8(+)
8+
7-
  3153.9 5  (11-)      228.0 3 
   640.1 3 
   42 8 
  100 20 
[D]
[E2]
  2925.9
  2513.8
(10+)
9-
  3932.9 6       779.0 3 
  100

  3153.9
(11-)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - possible ROTATIONAL BAND-1
  1848.41 21  6+        
  2229.3 3  8(+)      159.0 3 
   276.8 3 
   380.9 3 
   763.4 3 
   46 9 
   35 5 
  100 12 
   69 8 
[D+Q]
[E1]
(E2)
(E2)
  2070.1
  1952.7
  1848.41
  1465.98
7(+)
7-
6+
6+
  2814.9 4  (10+)      301.1 3 
   585.7 3 
   655.4 3 
   22 6 
  100 9 
   24 6 
[D]
[E2]
[Q]
  2513.8
  2229.3
  2159.4
9-
8(+)
8+
  3507.3 5       692.4 3 
  100

  2814.9
(10+)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 4 - possible ROTATIONAL BAND-2
  1747.40 23  5(+)        
  2070.1 3  7(+)      222.0 2 
   323.2 2 
   603.8 3 
   37 8 
   25 5 
  100 17 
[D+Q]
[E2]
(M1)
  1848.41
  1747.40
  1465.98
6+
5(+)
6+
  2680.1 4  (9+)      451.0 3 
   609.8 3 
  100 11 
   84 18 
[D+Q]
[E2]
  2229.3
  2070.1
8(+)
7(+)
  3343.0 5       662.9 3 
  100

  2680.1
(9+)

Back to top

Additional Gamma Data:















E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityMixing
Ratio
Conversion
Coefficient
Additional Data
   359.596 2+ 65 ps 2     359.598 14 E2 0.0257B(E2)(W.u.)=32.1 10, α=0.0257, α(K)=0.0212 3, α(L)=0.00356 5, α(M)=0.000748 11, α(N)=0.0001589 23, α(O)=2.31E-5 4, α(P)=1.232E-6 18, α(N+)=0.000183 3
   834.81 4+ 12.5 ps 8     475.17 9 E2 0.01135B(E2)(W.u.)=45 4, α=0.01135, α(K)=0.00952 14, α(L)=0.001455 21, α(M)=0.000303 5, α(N)=6.48E-5 9, α(O)=9.57E-6 14, α(P)=5.70E-7 8, α(N+)=7.49E-5 11
  1326.48 1- 10 ps 5     966.89 7 D+(Q)-0.013 8 
  1424.06 2+ < 9 ps   1064.54 7 E2+(M1)10 GT0.001586B(E2)(W.u.)>0.48, α=0.001586 23, α(K)=0.001363 20, α(L)=0.0001773 25, α(M)=3.64E-5 6, α(N)=7.84E-6 11, α(O)=1.194E-6 17, α(P)=8.46E-8 12, α(N+)=9.12E-6
  1465.98 6+ 7.2 ps 13     631.1 3 E2 0.00532B(E2)(W.u.)=18 4, α=0.00532 8, α(K)=0.00451 7, α(L)=0.000641 9, α(M)=0.0001329 19, α(N)=2.85E-5 4, α(O)=4.26E-6 6, α(P)=2.76E-7 4, α(N+)=3.30E-5 5
  1541.57 5-      706.8 3 E1 0.001519α=0.001519 22, α(K)=0.001314 19, α(L)=0.0001632 23, α(M)=3.34×10-5 5, α(N)=7.18E-6 10, α(O)=1.097E-6 16, α(P)=7.96E-8 12, α(N+)=8.36E-6
  1693.0 2+     1333.4 3 D+Q-0.94 29 
  2341.77 1     1982.1 2 D+(Q)+0.09 5 

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 10.6 m 2 
% β- = 100
HFS, isomer shift (1988We07,1985Ne09,1983Mu12,1981Ne06), mass (1986Au02).
E(level): GS band.
   359.5962+ 65 ps 2  μ=+0.852 10 (2005St24,1988Wo03,1986Gi14)
E(level): GS band.
T1/2(level): From βγγ(t) (1990Ma25).
   834.814+ 12.5 ps 8  E(level): GS band.
  1292.20(3-)   E(level): octupole band.
  1326.481- 10 ps 5  T1/2(level): From βγγ(t) (1990Ma25).
  1424.062+ < 9 ps T1/2(level): From βγγ(t) (1990Ma25).
  1465.986+ 7.2 ps 13  E(level): GS band.
  1535.530+ 9 ps 7  T1/2(level): From βγγ(t) (1990Ma25).
  1541.575-   E(level): octupole band.
  1639.600+ < 16 ps T1/2(level): From βγγ(t) (1990Ma25).
  1747.405(+)   E(level): possible ROTATIONAL BAND-2.
  1848.416+   E(level): possible ROTATIONAL BAND-1.
  1952.77-   E(level): octupole band.
  2070.17(+)   E(level): possible ROTATIONAL BAND-2.
  2159.48+   E(level): GS band.
  2229.38(+)   E(level): possible ROTATIONAL BAND-1.
  2513.89-   E(level): octupole band.
  2680.1(9+)   E(level): possible ROTATIONAL BAND-2.
  2814.9(10+)   E(level): possible ROTATIONAL BAND-1.
  2925.9(10+)   E(level): GS band.
  3153.9(11-)   E(level): octupole band.
  3343.0   E(level): possible ROTATIONAL BAND-2.
  3507.3   E(level): possible ROTATIONAL BAND-1.
  3794.9   E(level): GS band.
  3932.9   E(level): octupole band.
E(level)Jπ(level)T1/2(level)Comments
  4517.4   E(level): GS band.

Back to top

Additional Gamma Comments:

E(level)E(gamma)Comments
   834.81   475.17M(γ): compatible with γγ(θ)
  1424.06  1064.54M(γ): from γγ(θ)
  1848.41   382.4I(γ): 88 in 252Cf SF decay
  1013.6I(γ): 48 in 252Cf SF decay

Back to top