ADOPTED LEVELS, GAMMAS for 216Ra

Author: S. -c. Wu |  Citation: Nucl. Data Sheets 108, 1057 (2007) |  Cutoff date: 1-Mar-2007 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-4853 keV 14S(n)= 7314 keV 12S(p)= 4316 keV 12Q(α)= 9526 keV 9
Reference: 2012WA38

References:
  A  220Th α decay  B  (HI,xnγ)

General Comments:

Calculations, compilations, systematics:

Cluster model for α decay, Geiger-Nuttall plot: 1991Bu05

Equilibrium deformation energy: 1988So08

Octupole deformation: 1989Eg02

Proton-neutron interaction energy: 1990Mo11

Quasi-bands in even-even nuclei: 1984Sa37

Super- and hyperdeformed configurations: 1995We02

Levels: For proposed configurations for 216Ra levels, see 1983It01, 1985Ad09, 1990Sc29 and 1991Dr08

Levels: See (HI,xnγ) for a tabulation of α branches from excited states of 216Ra

Gammas: All γ data are from (HI,xnγ)

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
     0AB 0+ 182 ns 10 
% α = 100
% ε < 1×10-8
     
   688.20 20  B 2+     688.2 2 
  100
E2
     0
0+
  1164.1 3  B 4+ % α = 0.23
  475.9 2 
  100
E2
   688.20
2+
  1507.6 3  B 6+ < 0.2 ns
% α = 0.58
  343.5 1 
  100
E2
  1164.1
4+
  1711.1 4  B 8+ 1.42 ns 20 
% α = 1.86
  203.5 1 
  100
E2
  1507.6
6+
  2026.0 4  B 10+ 0.6 ns 1 
% α = 0.12
  314.9 1 
  100
E2
  1711.1
8+
  2335.2 4  B 11-     309.2 1 
  100
E1
  2026.0
10+
  2679.4 4  B 13- 0.96 ns 20    344.2 1 
  100
E2
  2335.2
11-
  3292.7 5  B 14+     613.3 2 
  100
E1
  2679.4
13-
  3412.7 5 ? B     120.1 2 ?
  100
D
  3292.7
14+
  3491.6 5  B 16+     198.9 1 
  100
E2
  3292.7
14+
  3580.7? B     168?
  100

  3412.7

  3582.1 5  B 16+     289.5 2 
  100
E2
  3292.7
14+
  3712.1 5  B 18+     130.4 5 
  220.4 2 
   23 6 
  100 13 

E2
  3582.1
  3491.6
16+
16+
  3763.5 5  B 19- 5.34 ns 15     51.4 1 
  100
E1
  3712.1
18+
  4320.4 6  B (20)-     556.9 3 
  100
M1+E2
  3763.5
19-
  4719.0 6  B (21)-     398.6 2 
  100
M1+E2
  4320.4
(20)-
  4977.0 7  B (23)-     258.0 2 
  100
E2
  4719.0
(21)-
  5170.5 7  B 6.6 ns 3    193.5 2 
  100
[E2]
  4977.0
(23)-
  5471.3 8  B     300.8 3 
  100
(D+Q)
  5170.5

  5832.5 8  B     361.2 2 
  100
(D+Q)
  5471.3

  6266.1 9  B     433.6 5 
  100
(D+Q)
  5832.5

E(level): From a least-squares fit to the Eγ in (HI,xnγ)

Jπ(level): From γ(θ) and γ multipolarities, the transitions up to the 3712 level are stretched E2’s (except E1 for the 309γ and 613γ from the 2335 and 3292 levels, respectively)

T1/2(level): From (HI,xnγ), except as noted.

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
   688.20 2+     688.2 2 E20.0190α=0.0190
  1164.1 4+ % α = 0.23
  475.9 2 E20.0435α=0.0435
  1507.6 6+ < 0.2 ns
% α = 0.58
  343.5 1 E20.1023B(E2)(W.u.)>7.0, α=0.1023
  1711.1 8+ 1.42 ns 20 
% α = 1.86
  203.5 1 E20.549B(E2)(W.u.)=9.6 14, α=0.549
  2026.0 10+ 0.6 ns 1 
% α = 0.12
  314.9 1 E20.1316B(E2)(W.u.)=3.5 6, α=0.1316
  2335.2 11-     309.2 1 E10.0329α=0.0329
  2679.4 13- 0.96 ns 20    344.2 1 E20.1017B(E2)(W.u.)=1.4 3, α=0.1017
  3292.7 14+     613.3 2 E10.00787α=0.00787
  3491.6 16+     198.9 1 E20.597α=0.597
  3582.1 16+     289.5 2 E20.1696α=0.1696
  3712.1 18+     220.4 2 E20.415α=0.415
  3763.5 19- 5.34 ns 15     51.4 1 E10.650B(E1)(W.u.)=0.000156 5, α=0.650
  4320.4 (20)-     556.9 3 M1+E20.08α=0.08 6
  4719.0 (21)-     398.6 2 M1+E20.20α=0.20 13
  4977.0 (23)-     258.0 2 E20.244α=0.244
  5170.5 6.6 ns 3    193.5 2 [E2]0.660B(E2)(W.u.)=2.47 12, α=0.660

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  5170.5 6.6 ns 3  g-factor=0.63 6 (2005St24,1985Ad09); other: 0.7 2 (1990Sc29).

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