ADOPTED LEVELS, GAMMAS for 142Xe

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-)=5288 keV 8S(n)= 5104 keV 4S(p)= 1.261×104 keV SYQ(α)= -1958 keV 6
Reference: 2012WA38

References:
  A  248Cm SF decay  B  Coulomb Excitation

General Comments:

Some recent theory, calculations: 2007Ji05, 2006Mo34, 1998Zh37, 1995Ba45, 1994Ma02, 1993Sh13, 1992Na07

Gammas: All data are from 248Cm SF decay

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

Q-value: Q(β-n)=1179 11, Q(εp)=-2.12×104 4 2011AuZZ

Q-value: Values in 2003Au03: Q(β-)=5040 10, S(n)=5220 14, S(p)=12250 22 (syst.), Q(α)=-1970 23 (syst.), Q(β-n)=930 10, Q(εp)=-2.12×104 4










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0.0AB 0+ 1.23 s 2 
% β- = 100
% β-n = 0.21 6
     
   287.20 20 AB 2+ 0.20 ns 3    287.2 2 
  100

     0.0
0+
   690.7 3 A  (4+)     403.5 2 
  100

   287.20
2+
  1181.1 4 A  (6+)     490.4 2 
  100

   690.7
(4+)
  1258.5 11 A  (3-)     971.3
  100

   287.20
2+
  1516.3 11 A  (5-)     825.6
  100

   690.7
(4+)
  1622.4 5 A      441.1
  931.7 5 
 
 


  1181.1
   690.7
(6+)
(4+)
  1732.2 4 A  (8+)     551.1 2 
  100

  1181.1
(6+)
  1864.5 8 A      683.4
  100

  1181.1
(6+)
  1888.3 9 A  (7-)     372?
  707.2
 
 

D
  1516.3
  1181.1
(5-)
(6+)
  1981.2 6 A      116.7
  358.9
  800.1 5 
   28 3 
   38 3 
  100 5 



  1864.5
  1622.4
  1181.1


(6+)
  2211.7 7 A      230.4
  347.2
  479.5
 
 
 



  1981.2
  1864.5
  1732.2


(8+)
  2342.6 5 A  (10+)     610.4 2 
  100

  1732.2
(8+)
  2351.2 7 A  (9-)     462.9
  618.9
   19 2 
  100 1 

E1
  1888.3
  1732.2
(7-)
(8+)
  2605.3 6 A      254.0
  393.4
  873.1 5 
   22 6 
   32 6 
  100 8 



  2351.2
  2211.7
  1732.2
(9-)

(8+)
  2805.9 9 A      200.6
  454.8
 
 


  2605.3
  2351.2

(9-)
  2891.7 9 A  (11-)     540.5
  549.1
 
 
(E2)

  2351.2
  2342.6
(9-)
(10+)
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  3014.3 7 A  (12+)     671.7 5 
  100

  2342.6
(10+)
  3210.4 14 A      404.5
  100

  2805.9

  3496.2 14 A  (13-)     481.6?
  604.5
 
 


  3014.3
  2891.7
(12+)
(11-)
  3739.7 12 A  (14+)     725.4
  100

  3014.3
(12+)
  3764.3 17 A      553.9
 

  3210.4

  4511.2 16 A  (16+)     771.5
 

  3739.7
(14+)

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

Jπ(level): From γγ angular correlations (consistent with stretched E2), linear polarization and systematics of collective bands in neighboring even-even nuclei, except where noted.

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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+ 1.23 s 2 
% β- = 100
% β-n = 0.21 6
     
   287.20 20  2+ 0.20 ns 3    287.2 2 
  100

     0.0
0+
   690.7 3  (4+)     403.5 2 
  100

   287.20
2+
  1181.1 4  (6+)     490.4 2 
  100

   690.7
(4+)
  1732.2 4  (8+)     551.1 2 
  100

  1181.1
(6+)
  2342.6 5  (10+)     610.4 2 
  100

  1732.2
(8+)
  3014.3 7  (12+)     671.7 5 
  100

  2342.6
(10+)
  3739.7 12  (14+)     725.4
  100

  3014.3
(12+)
  4511.2 16  (16+)     771.5
 

  3739.7
(14+)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - octupole band
  1258.5 11  (3-)        
  1516.3 11  (5-)     825.6
  100

   690.7
(4+)
  1888.3 9  (7-)     372?
  707.2
 
 

D
  1516.3
  1181.1
(5-)
(6+)
  2351.2 7  (9-)     462.9
  618.9
   19 2 
  100 1 

E1
  1888.3
  1732.2
(7-)
(8+)
  2891.7 9  (11-)     540.5
  549.1
 
 
(E2)

  2351.2
  2342.6
(9-)
(10+)
  3496.2 14  (13-)     481.6?
  604.5
 
 


  3014.3
  2891.7
(12+)
(11-)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - possible ROTATIONAL band
  2805.9 9         
  3210.4 14      404.5
  100

  2805.9

  3764.3 17      553.9
 

  3210.4

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
  2351.2 (9-)     618.9E10.00182α=0.00182 3, α(K)=0.001577 22, α(L)=0.000194 3, α(M)=3.90×10-5 6, α(N)=8.06E-6 12, α(O)=1.004E-6 14, α(N+)=9.06E-6 13
  2891.7 (11-)     540.5(E2)0.00725α=0.00725 11, α(K)=0.00615 9, α(L)=0.000876 13, α(M)=0.000179 3, α(N)=3.67×10-5 6, α(O)=4.42E-6 7, α(N+)=4.11E-5 6

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 1.23 s 2 
% β- = 100
% β-n = 0.21 6
For predictions on the features of delayed-neutron emission see 1982Ru01.
E(level): GS band.
   287.202+ 0.20 ns 3  μ=+0.84 26 (2009Go09)
E(level): GS band.
   690.7(4+)   E(level): GS band.
  1181.1(6+)   E(level): GS band.
  1258.5(3-)   E(level): octupole band.
  1516.3(5-)   E(level): octupole band.
  1732.2(8+)   E(level): GS band.
  1888.3(7-)   E(level): octupole band.
  2342.6(10+)   E(level): GS band.
  2351.2(9-)   E(level): octupole band.
  2805.9   E(level): possible ROTATIONAL band.
  2891.7(11-)   E(level): octupole band.
  3014.3(12+)   E(level): GS band.
  3210.4   E(level): possible ROTATIONAL band.
  3496.2(13-)   E(level): octupole band.
  3739.7(14+)   E(level): GS band.
  3764.3   E(level): possible ROTATIONAL band.
  4511.2(16+)   E(level): GS band.

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