ADOPTED LEVELS, GAMMAS for 218Po

Authors: Balraj Singh, M.S. Basunia, Murray Martin Et Al., |  Citation: Nucl. Data Sheets 160, 405 (2019) |  Cutoff date: 30-Oct-2019 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=259 keV 12S(n)= 5598 keV 7S(p)= 7662 keV 18Q(α)= 6114.75 keV 9
Reference: 2017WA10

References:
  A  218Bi β- decay (33 S)  B  222Rn α decay (3.8222 d)

General Comments:

Nuclide assignment: 218Po activity of 3 min first identified from decay of Ra by E. Rutherford and H.t. Barnes, Phil. Mag. 7, 202 (1904). See 2013Fr04 for a brief description of discovery of this isotope.

Theory references: consult NSR database (www.nndc.bnl.gov/nsr/) for 56 primary references for calculations of half-lives of radioactive decay modes, and 10 for nuclear structure

Q-value: S(2n)=9568.2 20; S(2p)=13700 200 (syst) (2017Wa10)










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0.0AB 0+ 3.097 m 12 
% β- = 0.020 2
% α = 99.980 2
     
   509.70 10 AB 2+     509.7 1 
  100
[E2]
     0.0
0+
   676 4 ? B        
   935.20 15 A  (4+)     425.5 1 
  100
[E2]
   509.70
2+
  1320.90 18 A  (6+)     385.7 1 
  100
[E2]
   935.20
(4+)
  1583.90 20 A  (8+)     263.0 1 
  100
[E2]
  1320.90
(6+)
  1757.9 3 A      174.5 9 
  437.0 2 
    5.0 25 
  100 50 


  1583.90
  1320.90
(8+)
(6+)
  1858.70 20 A      537.8 1 
  100

  1320.90
(6+)
  1871.0 3 A      287.1 2 
  100

  1583.90
(8+)
  2002.2 6 A      418.3 5 
  100

  1583.90
(8+)
  2047.5 6 A      176.6 9 
  463.5 6 
    1.6 16 
  100 33 


  1871.0
  1583.90

(8+)
  2286.8 4 A      702.9 3 
  100

  1583.90
(8+)

E(level): From a least-squares fit to Eγ data, by evaluators except where noted.

Jπ(level): From systematics of even-even nuclides in this mass region, unless otherwise stated

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
   509.70 2+     509.7 1 [E2]0.0307α=0.0307
   935.20 (4+)     425.5 1 [E2]0.0478α=0.0478
  1320.90 (6+)     385.7 1 [E2]0.0619α=0.0619
  1583.90 (8+)     263.0 1 [E2]0.189α=0.189

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 3.097 m 12 
% β- = 0.020 2
% α = 99.980 2
RMS nuclear charge radius relative to that of 210Po: δ|4r2|5(218Po,210Po)=+0.948 fm2 10(stat) 7(syst) (2015Fi07).

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