ADOPTED LEVELS, GAMMAS for 222Ra

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-)=-2300 keV 7S(n)= 6714 keV 7S(p)= 6246 keV 7Q(α)= 6679 keV 5
Reference: 2012WA38

References:
  A  226Th α decay  B  222Fr β- decay
  C  232Th(136Xe,xγ) 

General Comments:

For calculations of level energies by various methods, some including deformations of order higher than β(2), and for discussions on level structure see 2006Sa53, 2005Za02, 2003Sh02, 2001Za04 2001Za09, 1998Bu18, 1998Ra05, 1997Bu07, 1997Bu28, 1995De13, 1987En05, 1986Da03, 1985Na07, 1983Pi04, 1983Ia01, 1980Sh07, 1970Ne08

For theoretical calculations of equilibrium deformations and deformation energies see 1994Cw01, 1991Sk01, 1988So08, 1986Bo19, 1986Le05, 1984Na22, 1983Ro14, 1982Le19, 1982Du16 and 1981Gy03.

Exotic nuclear shapes, including superdeformation, hyperdeformation and octupole shapes, were calculated and discussed by 1994Cw01, 1992Ch20, 1992SkZZ, 1989De11, 1989Eg02, 1988Ba48, 1988Ro05, 1988So08, 1987Na10, 1987Ro08, 1986Bo19, 1986Ch23, 1984Na22.

For calculations of electric-dipole moment, and for discussions on the strong octupole effects and octupole deformation, as well as higher order of deformations, see 2004Ad15, 2003Ad32, 1991Eg01, 1991Bu10, 1989De11, 1986Le05

See 1988Ro02 for the E1, E3 transition probabilities and the 0+, 1- energy splitting.

See 1986Le05, 1993Yo02 for calculations of B(E1)/B(E2) transition probabilities from the Kπ=0- band.

For calculations of 14C emission probability, partial half-lives and branchings by using various models, see 1984Po08, 1985Po11, 1985Sh01, 1986De32, 1986Gr20, 1986Ir01, 1986Ka46, 1986La01, 1986Pi11, 1986Po15, 1986Ru11, 1987Bl04, 1987Gu04, 1987Iv01, 1987Po08, 1987Sh04, 1988Ba01, 1988Bl11, 1988Iv02, 1988Sh29, 1988Ta25, 1989Bu06, 1989Ci03, 1989Ma21, 1989Sh37, 1990Ba20, 1990Bu09, 1990Hu07, 1990Ka15, 1990Sh01, 1991Bu01, 1992Gu10, 1993Bu05, 1993De38, 1993Go18, 1993Gr15, 1993Gu11, 1993Ka21, 1993Si26, 1994Bu07, 1994De38, 1995Si05, 1998Ro11, 2002Sa55, 2004Re22, 2004Ba64, 2005Ku32, 2006Xu15, 2009Qi07, 2009Ro16, 2010Ni13, 2008Ni12

See 2001Ch02 for calculation of yrast band energies

Weighted mean of intrinsic electric dipole moment/intrinsic electric quadrupole moment=4.02 11 extracted from B(E1)/B(E2) (2007Co08)

Levels: The Kπ=0+ g.s. band and the Kπ=0- band at 242.11 keV have been interpreted as octupole parity-doublet bands. This nucleus falls slightly to the left of middle of the region of octupole deformation defined by the spin systematics for octupole shapes (1990Ja11).

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
     0.0ABC 0+ 38.0 s 5 
% α = 100
% 14C = 3.0×10-8 10
     
   111.12 2 ABC 2+ 0.52 ns 4     111.2 2 
   28 12 
E2
     0.0
0+
   242.11 2 ABC 1- < 1.2 ns    131.00 2 
   242.11 2 
   32.1 16 
  100 5 
[E1]
E1
   111.12
     0.0
2+
0+
   301.39 4 ABC 4+ < 1.4 ns    190.7 2 
  100 19 
E2
   111.12
2+
   317.29 5 ABC 3-       75.13 2 
   206.17 5 
    0.017 4 
  100 10 

E1
   242.11
   111.12
1-
2+
   473.76 8 ABC (5-)      172.37 2 
 

   301.39
4+
   550.3 4   C (6+)      248.4 2 
   86 17 
E2
   301.39
4+
   703.2 4   C (7-)      153.1 5 
   229.3 5 
   72 23 
   13 4 
E1
E2
   550.3
   473.76
(6+)
(5-)
   843.3 4   C (8+)      140.1 2 
   292.9 2 
   66 12 
   61 5 
E1
E2
   703.2
   550.3
(7-)
(6+)
   914.0 3 A   (0+)      671.9 3 
   802.7 5 
  100 11 
   21 8 


   242.11
   111.12
1-
2+
   992.4 5   C (9-)      149.3 5 
   289.0 5 
   50 8 
   44 5 
E1
E2
   843.3
   703.2
(8+)
(7-)
  1024.9 2 AB  2+      707.5 2 
   723.4 4 
   782.8 2 
   913.7 4 
  1025.0 4 
  100 5 
    3.4 5 
   98 9 
   17 3 
    6.7 12 





   317.29
   301.39
   242.11
   111.12
     0.0
3-
4+
1-
2+
0+
  1170.9 2  B  (3-,4+)      696.9 2 
   853.8 2 
   869.6 2 
   28.7 5 
  100 7 
   81 25 



   473.76
   317.29
   301.39
(5-)
3-
4+
  1171.6 3  B  1+,1-,2+      929.5 2 
  1060.3 2 
  1171.7 2 
   15 2 
  100 8 
   53 6 



   242.11
   111.12
     0.0
1-
2+
0+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  1173.3 5   C (10+)      180.9 2 
   330.1 2 
   57 13 
   43 4 
E1
E2
   992.4
   843.3
(9-)
(8+)
  1225.2 2  B  1+,1-,2+      982.9 2 
  1114.3 2 
  1225.2 2 
   97 19 
  100 19 
   38 7 



   242.11
   111.12
     0.0
1-
2+
0+
  1265.0 3  B  (2+,3)      963.6 2 
  1153.9 2 
   26 4 
  100 10 


   301.39
   111.12
4+
2+
  1310.2 3  B      1068.1 2 
 

   242.11
1-
  1330.8 6   C (11-)      157.4 5 
   338.3 5 
   27 4 
   42 4 
E1
E2
  1173.3
   992.4
(10+)
(9-)
  1360.6 3  B      1043.6 2 
  1249.1 2 
  100 13 
   60 11 


   317.29
   111.12
3-
2+
  1375.7 3  B      1133.6 2 
 

   242.11
1-
  1402.6 2  B  (3-)      231.7 2 
   377.6 2 
  1085.2 2 
  1101.1 2 
  1160.5 2 
  1291.6 2 
   15.2 16 
   24 2 
   92 12 
  100 10 
   14.4 14 
    9.6 16 






  1170.9
  1024.9
   317.29
   301.39
   242.11
   111.12
(3-,4+)
2+
3-
4+
1-
2+
  1432.6 3  B  1,2,3-     1190.4 3 
  1321.6 2 
    8.5 15 
  100 8 


   242.11
   111.12
1-
2+
  1439.9 2  B  (3-)      269.0 2 
   415.0 2 
   966.2 2 
  1122.4 2 
  1138.5 2 
  1198.0 2 
   13 3 
   11 2 
   23 5 
   40 7 
  100 10 
   30 5 






  1170.9
  1024.9
   473.76
   317.29
   301.39
   242.11
(3-,4+)
2+
(5-)
3-
4+
1-
  1499.5 3  B  1-,2,3-      474.5 3 
  1182.1 3 
  1257.5 3 
  1388.5 3 
  100 10 
   87 10 
   33 7 
   76 10 




  1024.9
   317.29
   242.11
   111.12
2+
3-
1-
2+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  1537.2 6   C (12+)      206.2 5 
   363.9 5 
   27 5 
   42 4 
E1
E2
  1330.8
  1173.3
(11-)
(10+)
  1556.1 4  B  2+     1238.6 3 
  1254.4 4 
  1445.2 4 
  1556.5 4 
  100 13 
   26 3 
   69 11 
   59 11 




   317.29
   301.39
   111.12
     0.0
3-
4+
2+
0+
  1619.6 4  B      1377.4 3 
  1508.7 4 
  100 15 
   24 7 


   242.11
   111.12
1-
2+
  1644.9 3  B  2+,3-      619.9 2 
  1327.6 2 
  1343.3 3 
  1402.5 4 
  1534.1 4 
   31 4 
  100 9 
   10.4 17 
   27 3 
   17 3 





  1024.9
   317.29
   301.39
   242.11
   111.12
2+
3-
4+
1-
2+
  1710.3 6   C (13-)      173.1 5 
   379.6 5 
   28 4 
   34 3 
E1
E2
  1537.2
  1330.8
(12+)
(11-)
  1754.4 6  B  3-      351.7 2 
  1281.0 3 
  1436.4 3 
  1453.4 3 
  1643.9 3 
   52 12 
   34 7 
  100 7 
   45 10 
   44 12 





  1402.6
   473.76
   317.29
   301.39
   111.12
(3-)
(5-)
3-
4+
2+
  1821.5 5  B  1,2,3     1579.4 4 
 

   242.11
1-
  1841.2 5     1,2,3      196.3 2 
  1599.6 4 
  100 13 
   16 5 


  1644.9
   242.11
2+,3-
1-
  1933.2 7   C (14+)      396.0 5 
   30 4 
E2
  1537.2
(12+)
  2125.3 7   C (15-)      192.1 5 
   415.0 5 
   23 10 
   34 4 
E1
E2
  1933.2
  1710.3
(14+)
(13-)
  2358.7 8   C (16+)      425.5 5 
   24 4 
E2
  1933.2
(14+)
  2570.1 8   C (17-)      211.4 5 
   444.8 5 
 
   32 6 

E2
  2358.7
  2125.3
(16+)
(15-)
  2811.0 10   C (18+)      452.3 5 
   17 4 
E2
  2358.7
(16+)
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  3040.9 10   C (19-)      470.8 5 
   15 4 
E2
  2570.1
(17-)
  3287.7 11   C (20+)      476.7 5 
   10 4 
E2
  2811.0
(18+)

E(γ): From 232Th(136Xe,Xγ) dataset. Those not observed in this dataset are taken from decay datasets.

E(γ): From 226Th α decay and 222Fr β- decay. The uncertainties of γ’s deexciting the levels above 1 MeV have been increased because of a poor energy fit to the level scheme; therefore, the Eγ values have been rounded off here. See 222Fr β- decay section for the experimental values listed by the authors.

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

M(γ): From GAMMASPHERE data (1999Co02). Multipolarities inside the square brackets are from the ce work in 226Tl α decay.

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - K=0 GS band.
     0.0 0+ 38.0 s 5 
% α = 100
% 14C = 3.0×10-8 10
     
   111.12 2  2+ 0.52 ns 4     111.2 2 
   28 12 
E2
     0.0
0+
   301.39 4  4+ < 1.4 ns    190.7 2 
  100 19 
E2
   111.12
2+
   550.3 4  (6+)      248.4 2 
   86 17 
E2
   301.39
4+
   843.3 4  (8+)      140.1 2 
   292.9 2 
   66 12 
   61 5 
E1
E2
   703.2
   550.3
(7-)
(6+)
  1173.3 5  (10+)      180.9 2 
   330.1 2 
   57 13 
   43 4 
E1
E2
   992.4
   843.3
(9-)
(8+)
  1537.2 6  (12+)      206.2 5 
   363.9 5 
   27 5 
   42 4 
E1
E2
  1330.8
  1173.3
(11-)
(10+)
  1933.2 7  (14+)      396.0 5 
   30 4 
E2
  1537.2
(12+)
  2358.7 8  (16+)      425.5 5 
   24 4 
E2
  1933.2
(14+)
  2811.0 10  (18+)      452.3 5 
   17 4 
E2
  2358.7
(16+)
  3287.7 11  (20+)      476.7 5 
   10 4 
E2
  2811.0
(18+)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - K=0 octupole VIBRATIONAL band.
   242.11 2  1- < 1.2 ns      
   317.29 5  3-       75.13 2 
   206.17 5 
    0.017 4 
  100 10 

E1
   242.11
   111.12
1-
2+
   473.76 8  (5-)      172.37 2 
 

   301.39
4+
   703.2 4  (7-)      153.1 5 
   229.3 5 
   72 23 
   13 4 
E1
E2
   550.3
   473.76
(6+)
(5-)
   992.4 5  (9-)      149.3 5 
   289.0 5 
   50 8 
   44 5 
E1
E2
   843.3
   703.2
(8+)
(7-)
  1330.8 6  (11-)      157.4 5 
   338.3 5 
   27 4 
   42 4 
E1
E2
  1173.3
   992.4
(10+)
(9-)
  1710.3 6  (13-)      173.1 5 
   379.6 5 
   28 4 
   34 3 
E1
E2
  1537.2
  1330.8
(12+)
(11-)
  2125.3 7  (15-)      192.1 5 
   415.0 5 
   23 10 
   34 4 
E1
E2
  1933.2
  1710.3
(14+)
(13-)
  2570.1 8  (17-)      211.4 5 
   444.8 5 
 
   32 6 

E2
  2358.7
  2125.3
(16+)
(15-)
  3040.9 10  (19-)      470.8 5 
   15 4 
E2
  2570.1
(17-)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - K=0 band.
   914.0 3  (0+)        
  1024.9 2  2+      707.5 2 
   723.4 4 
   782.8 2 
   913.7 4 
  1025.0 4 
  100 5 
    3.4 5 
   98 9 
   17 3 
    6.7 12 





   317.29
   301.39
   242.11
   111.12
     0.0
3-
4+
1-
2+
0+

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
   111.12 2+ 0.52 ns 4     111.2 2 E26.26B(E2)(W.u.)=111 9, α=6.26
   242.11 1- < 1.2 ns    131.00 2 [E1]0.254B(E1)(W.u.)>1.5E-5, α=0.254
1- < 1.2 ns    242.11 2 E10.0580B(E1)(W.u.)>7.4E-6, α=0.0580
   301.39 4+ < 1.4 ns    190.7 2 E20.716B(E2)(W.u.)>12, α=0.716
   317.29 3-      206.17 5 E10.0847α=0.0847

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 38.0 s 5 
% α = 100
% 14C = 3.0×10-8 10
14C branching from measured values of I(14C)/I(α)= 3.7×10-10 6 (1985Pr01), 3.1×10-10 10(1985Ho21), and 2.3×10-10 3 (1991Hu02). 1991Hu02 searched also for any 14C branching to the 3- state in 208Pb at 2614 keV and deduced an upper limit of 2×10-10% for its branch.
E(level): 14C branching from measured values of I(14C)/I(α)= 3.7×10-10 6 (1985Pr01), 3.1×10-10 10(1985Ho21), and 2.3×10-10 3 (1991Hu02). 1991Hu02 searched also for any 14C branching to the 3- state in 208Pb at 2614 keV and deduced an upper limit of 2×10-10% for its branch. K=0 GS band.
   111.122+ 0.52 ns 4  E(level): K=0 GS band.
   242.111- < 1.2 ns E(level): K=0 octupole VIBRATIONAL band.
   301.394+ < 1.4 ns E(level): K=0 GS band.
   317.293-   The nuclear electric dipole moment was deduced by 1992Ru01 as 0.036 6 fm from the branching ratio for E1, E2 transitions deexciting the level. The electric quadrupole moment of 6.74 b 28 for both the g.s. and the Kπ=0- band was assumed.
E(level): The nuclear electric dipole moment was deduced by 1992Ru01 as 0.036 6 fm from the branching ratio for E1, E2 transitions deexciting the level. The electric quadrupole moment of 6.74 b 28 for both the g.s. and the Kπ=0- band was assumed. K=0 octupole VIBRATIONAL band.
   473.76(5-)   E(level): K=0 octupole VIBRATIONAL band.
   550.3(6+)   E(level): K=0 GS band.
   703.2(7-)   E(level): K=0 octupole VIBRATIONAL band.
   843.3(8+)   E(level): K=0 GS band.
   914.0(0+)   E(level): K=0 band.
   992.4(9-)   E(level): K=0 octupole VIBRATIONAL band.
  1024.92+   E(level): K=0 band.
  1173.3(10+)   E(level): K=0 GS band.
  1330.8(11-)   E(level): K=0 octupole VIBRATIONAL band.
  1537.2(12+)   E(level): K=0 GS band.
  1710.3(13-)   E(level): K=0 octupole VIBRATIONAL band.
  1933.2(14+)   E(level): K=0 GS band.
  2125.3(15-)   E(level): K=0 octupole VIBRATIONAL band.
  2358.7(16+)   E(level): K=0 GS band.
  2570.1(17-)   E(level): K=0 octupole VIBRATIONAL band.
  2811.0(18+)   E(level): K=0 GS band.
  3040.9(19-)   E(level): K=0 octupole VIBRATIONAL band.
  3287.7(20+)   E(level): K=0 GS band.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   242.11   242.11M(γ): from ce work in 226Th α decay
   317.29   206.17M(γ): from ce work in 226Th α decay

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