ADOPTED LEVELS, GAMMAS for 234Th

Authors: E. Browne, J. K. Tuli |  Citation: Nucl. Data Sheets 108, 681 (2007) |  Cutoff date: 1-Jun-2006 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=274 keV 4S(n)= 6191 keV 4S(p)= 7983 keV 14Q(α)= 3673 keV 11
Reference: 2012WA38

References:
  A  238U α decay  B  234Ac β- decay
  C  232Th(136Xe,xγ)  D  238U(d,6Li)
  E  232Th(18O,16OG)  F  232Th(t,p) E=20 MeV

General Comments:

Theory/Calculations:

2006De05: Systematics of α decay to rotational states

2005La04: Binding energies, radii rel mean-field interaction

2005Po01,2004Mo06,2003Po15,1995Ba47: Fission phenomena

For calculated and deduced fission-barrier parameters, see 1971Pa31, 1974Ba28, 1976Sh22, 1978Ma48, 1978Pr05 and 1980Ku14, for example.

2003Bu11,2003Bu27: Band comparisons

2002Gi11: Super-deformed states

2000Bu02,200bu32,1998Bu18,1983Ia01: Cluster models

1992So10: Intrinsic structures and rotational bands

1988Bh04: g.s. bands, anharmonic vibrator model

1988Ri07,1986Da03: interacting boson model.

1988Bh04: B(E2) value for deexcitation of the 2+ state was calculated using an anharmonic vibrational description of the nuclear collective motion.

1987Be43: α decay

1986Da03: The (p,t) cross section for population of excited 0+ state relative to that for population of g.s. was calculated by utilizing an interacting boson model of α-like clustering in nuclei. The g.s. band level energies and the B(E2) value for excitation of the 2+ state of g.s. band were calculated

1972Va20: calculations of low-lying 0+ states, and (p,t) strengths for their populations.

1970Ga12, 1983Ro14: Calculated quadrupole and hexadecapole moments corresponding to equilibrium deformations.

1970Ne08: Energies of octupole-vibrational bands and B(E3) values for excitation of 3- states were calculated by using a modified octupole-octupole force and by including the Coriolis interaction between the states of the intrinsic octupole quadruplet (Kπ=0-,1-,2-,3-).

γ-vibrational state energy and B(E2) value for excitation of 2+ state were calculated by 1965Be40 within the framework of the Nilsson single-particle model, the quasiparticle and quasiboson approximations.

1967So04, 1970Ga12, 1982Le19, 1982Du16, 1983Ro14: calculations of equilibrium deformation parameters

1965So04: Quadrupole (Kπ=0+,2+) and octupole (Kπ=0-,1-,2-) collective bandheads were calculated by using the superfluid nuclear model.

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










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0.0ABCDEF 0+ 24.10 d 3 
% β- = 100
     
    49.55 6 ABCDEF 2+ 0.37 ns 3      49.55 6 
 
E2
     0.0
0+
   163.05 12 ABCDEF 4+      113.5 1 
 
E2
    49.55
2+
   336.45 24   CDE  6+      173.4 2 
  100.0
E2
   163.05
4+
   564.7 3   CDE  8+      228.3 2 
  100.0
E2
   336.45
6+
   688.38 22  B     (1-)      638.7 3 
   688.5 3 
   59 12 
  100 14 


    49.55
     0.0
2+
0+
   810 30    D   (0+)        
   842.5 4   C E  10+      277.8 2 
  100.0
E2
   564.7
8+
   995.0 5   C    (7-)      658.4 5 
  100

   336.45
6+
  1150 40    D   (0+)        
  1164.9 6   C E  (12+)      322.3 5 
  100.0
E2
   842.5
10+
  1194.8 5   C    (9-)      199.7 5 
   630.1 5 
    6E1 3 
  100 12 
E2
E1
   995.0
   564.7
(7-)
8+
  1441.9 5   C    (11-)      247.1 5 
   599.4 5 
  100 19 
   72 9 
E2
E1
  1194.8
   842.5
(9-)
10+
  1470 40    D   (0+)        
  1526.6 7   C    (14+)      361.8 5 
  100.0
E2
  1164.9
(12+)
  1731.0 6   C    (13-)      289.1 5 
   566.0 5 
    1.0E2 4 
   41 13 
E2
E1
  1441.9
  1164.9
(11-)
(12+)
  1896.3 15  B     (1,2+)     1847 2 
  1896 2 
  100 17 
   64 15 


    49.55
     0.0
2+
0+
  1913.0 15  B     (1,2+)     1751 2 
  1912 2 
   64 16 
  100 20 


   163.05
     0.0
4+
0+
  1923.4 8   C    (16+)      396.8 5 
  100.0
E2
  1526.6
(14+)
  2059.2 7   C    (15-)      328.2 5 
   532.7 5 
  100 16 
   10 4 
E2
E1
  1731.0
  1526.6
(13-)
(14+)
  2351.0 9   C    (18+)      427.6 5 
  100.0
E2
  1923.4
(16+)
  2422.9 8   C    (17-)      363.7 5 
   499.4 5 
  100 24 
   10 4 
E2
E1
  2059.2
  1923.4
(15-)
(16+)
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  2805.1 11   C    (20+)      454.1 5 
  100.0
E2
  2351.0
(18+)
  2816.6 9   C    (19-)      393.7 5 
   465.8 5 ?
    1.0E2 3 
 
E2

  2422.9
  2351.0
(17-)
(18+)
  3238.3 11   C    (21-)      421.7 5 
  100.0
E2
  2816.6
(19-)
  3281.4 12   C    (22+)      476.3 5 
  100.0
E2
  2805.1
(20+)
  3684.3 12   C    (23-)      446.0 5 
  100.0
E2
  3238.3
(21-)
  3775.1 13   C    (24+)      493.7 5 
  100.0
E2
  3281.4
(22+)

E(level): From least squares fit to Eγ

Jπ(level): Mostly from (136Xe,Xγ) based on γγ(θ) and band assignments, unless stated explicitly.

E(γ): From 238U α decay, 234Ac β- decay and 234Th(136Xe,Xγ)

I(γ): Relative photon intensity deexciting each level.

M(γ): E2 multipolarity for the 49.55 and 113.5 γ rays are from 238U α decay; quadrupole character for the 173.5-, 228.3- 278.2-keV γ rays were deduced by 1989Ge01 from particle-γ angular correlation measurements in 232Th(18O,16Oγ) reaction.

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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+ 24.10 d 3 
% β- = 100
     
    49.55 6  2+ 0.37 ns 3      49.55 6 
 
E2
     0.0
0+
   163.05 12  4+      113.5 1 
 
E2
    49.55
2+
   336.45 24  6+      173.4 2 
  100.0
E2
   163.05
4+
   564.7 3  8+      228.3 2 
  100.0
E2
   336.45
6+
   842.5 4  10+      277.8 2 
  100.0
E2
   564.7
8+
  1164.9 6  (12+)        
  1526.6 7  (14+)      361.8 5 
  100.0
E2
  1164.9
(12+)
  1923.4 8  (16+)      396.8 5 
  100.0
E2
  1526.6
(14+)
  2351.0 9  (18+)        
  2805.1 11  (20+)      454.1 5 
  100.0
E2
  2351.0
(18+)
  3281.4 12  (22+)      476.3 5 
  100.0
E2
  2805.1
(20+)
  3775.1 13  (24+)      493.7 5 
  100.0
E2
  3281.4
(22+)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - octupole band
   995.0 5  (7-)        
  1194.8 5  (9-)      199.7 5 
   630.1 5 
    6E1 3 
  100 12 
E2
E1
   995.0
   564.7
(7-)
8+
  1441.9 5  (11-)      247.1 5 
   599.4 5 
  100 19 
   72 9 
E2
E1
  1194.8
   842.5
(9-)
10+
  1731.0 6  (13-)      289.1 5 
   566.0 5 
    1.0E2 4 
   41 13 
E2
E1
  1441.9
  1164.9
(11-)
(12+)
  2059.2 7  (15-)      328.2 5 
   532.7 5 
  100 16 
   10 4 
E2
E1
  1731.0
  1526.6
(13-)
(14+)
  2422.9 8  (17-)      363.7 5 
   499.4 5 
  100 24 
   10 4 
E2
E1
  2059.2
  1923.4
(15-)
(16+)
  2816.6 9  (19-)        
  3238.3 11  (21-)      421.7 5 
  100.0
E2
  2816.6
(19-)
  3684.3 12  (23-)      446.0 5 
  100.0
E2
  3238.3
(21-)

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
    49.55 2+ 0.37 ns 3      49.55 6 E2326B(E2)(W.u.)=183 16, α=326
   336.45 6+      173.4 2 E21.149α=1.149
   564.7 8+      228.3 2 E20.419α=0.419
   842.5 10+      277.8 2 E20.217α=0.217

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 24.10 d 3 
% β- = 100
α decay was not observed: %α<1×10-4 (1955De47).
E(level): α decay was not observed: %α<1×10-4 (1955De47). GS band.
    49.552+ 0.37 ns 3  E(level): GS band.
   163.054+   E(level): GS band.
   336.456+   E(level): GS band.
   564.78+   E(level): GS band.
   810(0+)   Jπ(level): From (d,6Li) reaction data, based on systematics of 0+ states, and on angular distributions for transitions to the unresolved 0+, 2+ states within the bands.
   842.510+   E(level): GS band.
   995.0(7-)   E(level): octupole band.
  1150(0+)   Jπ(level): From (d,6Li) reaction data, based on systematics of 0+ states, and on angular distributions for transitions to the unresolved 0+, 2+ states within the bands.
  1164.9(12+)   E(level): GS band.
  1194.8(9-)   E(level): octupole band.
  1441.9(11-)   E(level): octupole band.
  1470(0+)   Jπ(level): From (d,6Li) reaction data, based on systematics of 0+ states, and on angular distributions for transitions to the unresolved 0+, 2+ states within the bands.
  1526.6(14+)   E(level): GS band.
  1731.0(13-)   E(level): octupole band.
  1923.4(16+)   E(level): GS band.
  2059.2(15-)   E(level): octupole band.
  2351.0(18+)   E(level): GS band.
  2422.9(17-)   E(level): octupole band.
  2805.1(20+)   E(level): GS band.
  2816.6(19-)   E(level): octupole band.
  3238.3(21-)   E(level): octupole band.
  3281.4(22+)   E(level): GS band.
  3684.3(23-)   E(level): octupole band.
  3775.1(24+)   E(level): GS band.

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