ADOPTED LEVELS, GAMMAS for 206Ra

Author: F.G. Kondev |  Citation: Nucl. Data Sheets 109, 1527 (2008) |  Cutoff date: 31-Jan-2008 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-9.90×103 keV SYS(n)= 1.034×104 keV 8S(p)= 2413 keV 20Q(α)= 7415 keV 5
Reference: 2012WA38

References:
  A  210Th α decay  B  170Yb(40Ar,4nγ)








E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0AB 0+ 0.24 s 2 
% α ≈ 100
     
   474.3 5  B (2+)     474.3 5 
  100
[E2]
     0
0+
  1052.1 7  B (4+)     577.8 5 
  100
[E2]
   474.3
(2+)
  1762.7 9  B (6+)     710.6 5 
  100
[E2]
  1052.1
(4+)
  2010.1 10  B (8+) < 1 ns   247.4 5 
  100
[E2]
  1762.7
(6+)

E(level): From a least-squares fit to Eγ

Jπ(level): From 170Yb(40Ar,4nγ) (1999Co13) based on the apparent band structure and systematics of heavier Ra nuclei

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   474.3 (2+)     474.3 5 [E2]0.0439α=0.0439, α(K)=0.0280 4, α(L)=0.01186 17, α(M)=0.00306 5, α(N)=0.000807 12, α(O)=0.000177 3, α(P)=2.80×10-5 4, α(Q)=1.032E-6 15, α(N+)=0.001013 15
  1052.1 (4+)     577.8 5 [E2]0.0277α=0.0277, α(K)=0.0191 3, α(L)=0.00645 10, α(M)=0.001639 24, α(N)=0.000432 7, α(O)=9.55×10-5 14, α(P)=1.540E-5 22, α(Q)=6.87E-7 10, α(N+)=0.000544 8
  1762.7 (6+)     710.6 5 [E2]0.0178α=0.0178, α(K)=0.01295 19, α(L)=0.00361 5, α(M)=0.000903 13, α(N)=0.000238 4, α(O)=5.29×10-5 8, α(P)=8.69E-6 13, α(Q)=4.55E-7 7, α(N+)=0.000300 5
  2010.1 (8+) < 1 ns   247.4 5 [E2]0.280B(E2)(W.u.)>6.5, α=0.280 5, α(K)=0.1057 16, α(L)=0.1286 21, α(M)=0.0344 6, α(N)=0.00910 15, α(O)=0.00196 4, α(P)=0.000294 5, α(Q)=4.42E-6 7, α(N+)=0.01136 19

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     00+ 0.24 s 2 
% α ≈ 100
E=7269 keV 4, weighted average of 7262 keV 15 (1995Uu01), 7270 keV 10 (1987He10) and 7270 keV 5 (1967Va22). Others: 7268 keV 10 (1995Le15, 1996Le09) and 7263 keV 20 (1995Le41).
  2010.1(8+) < 1 ns Configuration=(π h9/2)+28+ (1999Co13). The assignment is tentative. Given the large B(E2) value for the 247.4γ a significant mixture with a collective 8+ state can be expected.

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