ADOPTED LEVELS, GAMMAS for 216Po

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-)=-474 keV 4S(n)= 5747.2 keV 24S(p)= 7154 keV 15Q(α)= 6906.3 keV 5
Reference: 2012WA38

References:
  A  216Bi β- decay (2.25 M)  B  216Bi β- decay (2.25 M+6.6 M)
  C  220Rn α decay 

General Comments:

Historical Note: this isotope was originally called Thorium a with symbol Th a.

Calculations, compilations:

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

Quasi-bands in even-even nuclei: 1984Sa37

Spontaneous emission of heavy ions: 1986Po06

Superdeformed and hyperdeformed configurations: 1995We02

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+ 0.145 s 2 
% α = 100
     
   549.76 4 ABC 2+     549.76 4 
  100
(E2)
     0.0
0+
   968.94 9 AB  (4+)     419.18 8 
  100
(E2)
   549.76
2+
  1328.4 4 A   (6+)     359.5
  100
(E2)
   968.94
(4+)
  1551.8 5 A   (8+)     223.4
  100
(E2)
  1328.4
(6+)
  1699.6 6 A       147.8
  100

  1551.8
(8+)
  1803.0 6 A       251.2
  100

  1551.8
(8+)
  1874.2 6 A       322.4
  100

  1551.8
(8+)
  1980.5?A       428.7?
  100

  1551.8
(8+)
  2038.7 6 A       486.9
  100

  1551.8
(8+)
  2233.8 6 A       682.0
  100

  1551.8
(8+)

E(level): If ΔEγ not given, |+0.30 keV assumed for least-squares fitting

E(level): From least-square fit to Eγ’s with Δ(Eγ)=0.3 keV assumed when the uncertainty is not given.

Jπ(level): Assigned as members of the yrast sequence, β- decayed from the 2.25 min isomer of 216Bi with Jπ=(6-,7-), feeding the 1551.4 level.

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Yrast sequence.
     0.0 0+ 0.145 s 2 
% α = 100
     
   549.76 4  2+     549.76 4 
  100
(E2)
     0.0
0+
   968.94 9  (4+)     419.18 8 
  100
(E2)
   549.76
2+
  1328.4 4  (6+)     359.5
  100
(E2)
   968.94
(4+)
  1551.8 5  (8+)     223.4
  100
(E2)
  1328.4
(6+)

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
   549.76 2+     549.76 4 (E2)0.0257α=0.0257
   968.94 (4+)     419.18 8 (E2)0.0497α=0.0497
  1328.4 (6+)     359.5(E2)0.0749α=0.0749
  1551.8 (8+)     223.4(E2)0.322α=0.322

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 0.145 s 2 
% α = 100
E(level): Yrast sequence.
   549.762+   E(level): Yrast sequence. Expected coupling of π(1h9/2)2.
   968.94(4+)   E(level): Yrast sequence. Expected coupling of π(1h9/2)2.
  1328.4(6+)   E(level): Yrast sequence. Expected coupling of π(1h9/2)2.
  1551.8(8+)   E(level): Yrast sequence. Expected coupling of π(1h9/2)2.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   549.76   549.76E(γ): weighted average of Eγ’s from 216Bi β- decay (2.25 min), 216Bi β- decay (2.25 min+6.6 min) and 220Rn α decay.
M(γ): from 220Rn α decay
   968.94   419.18E(γ): weighted average of Eγ’s from 216Bi β- decay (2.25 min) and 216Bi β- decay (2.25 min+6.6 min).

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