ADOPTED LEVELS, GAMMAS for 222Th

Authors: Sukhjeet Singh, A. K. Jain, Jagdish K. Tuli |  Citation: Nucl. Data Sheets 112,2851 (2011) |  Cutoff date: 31-Mar-2011 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-4.95×103 keV SYS(n)= 7806 keV 16S(p)= 4.61×103 keV 6Q(α)= 8127 keV 5
Reference: 2012WA38

References:
  A  226U α decay  B  (HI,xnγ)

General Comments:

See 1982Du16, 1982Le19, 1983Ro14, 1984Na22, 1988So08, 1989Eg02 for calculations of equilibrium deformations and discussions of deformation parameters.

See 1987Na10, 1985Na07, 1984Fr06 and 1984Na08 for studies on the shapes of the rotating nuclei.

See 2010Gu18 for microscopic description of nuclear shape evolution from spherical to octupole-deformation.

See 2009Qi07 for predictions of 14C cluster decay using universal decay law.

See 1991Bu10 for theoretical calculations of intrinsic-dipole moments by including β(2) - β(8) deformations which were taken from 1988So08. Using the ground-state deformation parameters of 1984Na22, the macroscopic dipole moment was calculated by 1986Do03. See also 2004Ad15, 2003Ad32

Theoretical values of the reduced dipole and quadrupole transition probabilities were calculated, and their ratios were compared with experimental ratios by 1995De13, 1993Dz01, 1988Ot02, 1987Ka37, 1987Na10, 1986Le05

The level energies of the g.s. band up to the 26+ state and of the octupole-vibrational band up to the 25- state were calculated by 1995De13 by considering higher order of deformations. See 1995De13 for calculations, discussions and comparison with experiments. See also 1988Na08, 1988Ot02, 2005Za02, 2003Sh02, 2001Za04, 2001Za09, 1999Jo17

The changes in calculated binding energies due to varying the 26 pole deformation parameters were studied by 1986Ch23.

Possible decay by 26Ne emission was studied and partial half-life relative to α decay half-life was calculated by 1990Sh01.

Levels: The Kπ=0+ g.s. band and the Kπ=0- band at 467.0 keV have been interpreted as octupole parity-doublet bands. This nucleus lies in the left part of the octupole deformation defined by the spin systematics for octupole shapes (1990Ja11).

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

Q-value: Estimated: ΔQ(β-)=70 (2003Au03,2011AuZZ)









E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
M(γ)Final Levels
     0.0AB 0+ 2.24 ms 3 
% α = 100
    
   183.3AB 2+ 240 ps 20    183.3
E2
     0.0
0+
   439.8 B 4+ 46 ps 6    256.5
E2
   183.3
2+
   467.0 B 3-     283.7

   183.3
2+
   651.0 B 5-     211.2
E1
   439.8
4+
   750.0 B 6+ ≤ 45 ps    99.1
  310.2
(E1)
E2
   651.0
   439.8
5-
4+
   923.5 B 7-     173.3
  272.5
E1
(E2)
   750.0
   651.0
6+
5-
  1093.5 B 8+     170.4
  343.5
E1
E2
   923.5
   750.0
7-
6+
  1255.3 B 9-     161.2
  331.8
E1
E2
  1093.5
   923.5
8+
7-
  1461.1 B 10+     206.4
  367.6
E1
E2
  1255.3
  1093.5
9-
8+
  1622.6 B 11-     160.9
  367.3
(E1)
E2
  1461.1
  1255.3
10+
9-
  1850.7 B 12+     228.5
  389.6
E1
E2
  1622.6
  1461.1
11-
10+
  2015.5 B 13-     164.6
  392.9
E1
E2
  1850.7
  1622.6
12+
11-
  2259.7 B 14+     244.3
  409.0
E1
E2
  2015.5
  1850.7
13-
12+
  2431.9 B 15-     172.0
  416.4
(E1)
E2
  2259.7
  2015.5
14+
13-
  2687.8 B 16+     256.1
  428.1
E1
E2
  2431.9
  2259.7
15-
14+
  2873.0 B 17-     185.0
  441.1
(E1)
E2
  2687.8
  2431.9
16+
15-
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
M(γ)Final Levels
  3133.5 B 18+     260.2
  445.7


  2873.0
  2687.8
17-
16+
  3340.7 B 19-     207.5
  467.7


  3133.5
  2873.0
18+
17-
  3596.0 B 20+     255
  462.5

E2
  3340.7
  3133.5
19-
18+
  3835.5 B 21-     239.2
  494.8


  3596.0
  3340.7
20+
19-
  4077.6 B 22+     243
  481.6


  3835.5
  3596.0
21-
20+
  4349.5 B 23-     273
  514


  4077.6
  3835.5
22+
21-
  4577.9 B 24+     228
  500.3


  4349.5
  4077.6
23-
22+
  4882.5? B (25-)     304?
  533.3


  4577.9
  4349.5
24+
23-
  5097.9? B (26+)     217?
  520.0


  4882.5
  4577.9
(25-)
24+

Jπ(level): All excited state properties are from (HI,xnγ) reaction data. Jπ are based upon γ multipolarities and fits to rotational bands.

T1/2(level): The excited state half-lives were measured by 1985Bo32. See (HI,xnγ) reaction section.

E(γ): From (HI,xnγ) data.

M(γ): All γ properties are from (HI,xnγ) reaction data.

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)M(γ)Final Levels
Band 1 - Kπ=0+ GS band.
     0.0 0+ 2.24 ms 3 
% α = 100
    
   183.3 2+ 240 ps 20    183.3
E2
     0.0
0+
   439.8 4+ 46 ps 6    256.5
E2
   183.3
2+
   750.0 6+ ≤ 45 ps    99.1
  310.2
(E1)
E2
   651.0
   439.8
5-
4+
  1093.5 8+     170.4
  343.5
E1
E2
   923.5
   750.0
7-
6+
  1461.1 10+     206.4
  367.6
E1
E2
  1255.3
  1093.5
9-
8+
  1850.7 12+     228.5
  389.6
E1
E2
  1622.6
  1461.1
11-
10+
  2259.7 14+     244.3
  409.0
E1
E2
  2015.5
  1850.7
13-
12+
  2687.8 16+     256.1
  428.1
E1
E2
  2431.9
  2259.7
15-
14+
  3133.5 18+     260.2
  445.7


  2873.0
  2687.8
17-
16+
  3596.0 20+     255
  462.5

E2
  3340.7
  3133.5
19-
18+
  4077.6 22+     243
  481.6


  3835.5
  3596.0
21-
20+
  4577.9 24+     228
  500.3


  4349.5
  4077.6
23-
22+
  5097.9 (26+)     217?
  520.0


  4882.5
  4577.9
(25-)
24+
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)M(γ)Final Levels
Band 2 - Kπ=0- OCTUPOLE-VIBRATIONAL band.
   467.0 3-       
   651.0 5-     211.2
E1
   439.8
4+
   923.5 7-     173.3
  272.5
E1
(E2)
   750.0
   651.0
6+
5-
  1255.3 9-     161.2
  331.8
E1
E2
  1093.5
   923.5
8+
7-
  1622.6 11-     160.9
  367.3
(E1)
E2
  1461.1
  1255.3
10+
9-
  2015.5 13-     164.6
  392.9
E1
E2
  1850.7
  1622.6
12+
11-
  2431.9 15-     172.0
  416.4
(E1)
E2
  2259.7
  2015.5
14+
13-
  2873.0 17-     185.0
  441.1
(E1)
E2
  2687.8
  2431.9
16+
15-
  3340.7 19-     207.5
  467.7


  3133.5
  2873.0
18+
17-
  3835.5 21-     239.2
  494.8


  3596.0
  3340.7
20+
19-
  4349.5 23-     273
  514


  4077.6
  3835.5
22+
21-
  4882.5 (25-)     304?
  533.3


  4577.9
  4349.5
24+
23-

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
   183.3 2+ 240 ps 20    183.3E20.931B(E2)(W.u.)=74 7, α=0.931
   439.8 4+ 46 ps 6    256.5E20.283B(E2)(W.u.)=108 15, α=0.283
   651.0 5-     211.2E10.0836α=0.0836
   750.0 6+ ≤ 45 ps    99.1(E1)0.122B(E1)(W.u.)≥0.0015, α=0.122
6+ ≤ 45 ps   310.2E20.155B(E2)(W.u.)≥27, α=0.155
   923.5 7-     173.3E10.134α=0.134
7-     272.5(E2)0.232α=0.232
  1093.5 8+     170.4E10.140α=0.140
8+     343.5E20.115α=0.115
  1255.3 9-     161.2E10.160α=0.160
9-     331.8E20.127α=0.127
  1461.1 10+     206.4E10.088α=0.088
10+     367.6E20.095α=0.095
  1622.6 11-     160.9(E1)0.160α=0.160
11-     367.3E20.095α=0.095
  1850.7 12+     228.5E10.0700α=0.0700
12+     389.6E20.0813α=0.0813
  2015.5 13-     164.6E10.152α=0.152
13-     392.9E20.0795α=0.0795
  2259.7 14+     244.3E10.0597α=0.0597
14+     409.0E20.0715α=0.0715
  2431.9 15-     172.0(E1)0.137α=0.137
15-     416.4E20.0683α=0.0683
  2687.8 16+     256.1E10.0536α=0.0536
16+     428.1E20.0636α=0.0636
E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
  2873.0 17-     185.0(E1)0.115α=0.115
17-     441.1E20.0589α=0.0589
  3596.0 20+     462.5E20.0524α=0.0524

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 2.24 ms 3 
% α = 100
Branching: only α decay has been observed.
E(level): Branching: only α decay has been observed. Kπ=0+ GS band.
   183.32+ 240 ps 20  E(level): Kπ=0+ GS band.
   439.84+ 46 ps 6  E(level): Kπ=0+ GS band.
   467.03-   E(level): Kπ=0- OCTUPOLE-VIBRATIONAL band.
   651.05-   E(level): Kπ=0- OCTUPOLE-VIBRATIONAL band.
   750.06+ ≤ 45 ps E(level): Kπ=0+ GS band.
   923.57-   E(level): Kπ=0- OCTUPOLE-VIBRATIONAL band.
  1093.58+   E(level): Kπ=0+ GS band.
  1255.39-   E(level): Kπ=0- OCTUPOLE-VIBRATIONAL band.
  1461.110+   E(level): Kπ=0+ GS band.
  1622.611-   E(level): Kπ=0- OCTUPOLE-VIBRATIONAL band.
  1850.712+   E(level): Kπ=0+ GS band.
  2015.513-   E(level): Kπ=0- OCTUPOLE-VIBRATIONAL band.
  2259.714+   E(level): Kπ=0+ GS band.
  2431.915-   E(level): Kπ=0- OCTUPOLE-VIBRATIONAL band.
  2687.816+   E(level): Kπ=0+ GS band.
  2873.017-   E(level): Kπ=0- OCTUPOLE-VIBRATIONAL band.
  3133.518+   E(level): Kπ=0+ GS band.
  3340.719-   E(level): Kπ=0- OCTUPOLE-VIBRATIONAL band.
  3596.020+   E(level): Kπ=0+ GS band.
  3835.521-   E(level): Kπ=0- OCTUPOLE-VIBRATIONAL band.
  4077.622+   E(level): Kπ=0+ GS band.
  4349.523-   E(level): Kπ=0- OCTUPOLE-VIBRATIONAL band.
  4577.924+   E(level): Kπ=0+ GS band.
  4882.5(25-)   E(level): Kπ=0- OCTUPOLE-VIBRATIONAL band.
E(level)Jπ(level)T1/2(level)Comments
  5097.9(26+)   E(level): Kπ=0+ GS band.

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