ADOPTED LEVELS, GAMMAS for 206Rn

Author: F.G. Kondev |  Citation: Nucl. Data Sheets 201, 346 (2025) |  Cutoff date: 21-Jan-2025 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-7886 keV 29S(n)= 9494 keV 10S(p)= 3437 keV 15Q(α)= 6383.7 keV 16
Reference: 2021WA16

References:
  A  210Ra α decay  B  206Fr ε decay
  C  (HI,xnγ) 








E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0ABC 0+ 5.67 m 17 
% ε = 38 3
% α = 62 3
     
   575.30 10 ABC 2+     575.3 1 
  100
E2
     0.0
0+
  1134.30 15  BC 4+     559.0 1 
  100
E2
   575.30
2+
  1501.80 15  B  (2-,3)     926.5 1 
  100

   575.30
2+
  1762.90 18  BC 6+ 1.8 ns 13    628.6 1 
  100
E2
  1134.30
4+
  1818.30 18  BC (6)+     684.0 1 
  100
E2
  1134.30
4+
  1924.30 20  BC 8+ 6.3 ns 24    161.4 1 
  100
E2
  1762.90
6+
  2024.90 18  B      890.6 1 
  100

  1134.30
4+
  2174.30 20  B      356.0 1 
  100

  1818.30
(6)+
  2206.90 23  B  (7,8)+     282.6 1 
  100
M1
  1924.30
8+
  2269.89 23  BC 9-     345.6 1 
  100
E1
  1924.30
8+
  2475.55 25   C 10- 65 ns 5    205.7 2 
  551.2 2 
  100
   82
M1
M2
  2269.89
  1924.30
9-
8+
  2534.6 3   C 10+     610.3 2 
  100
E2
  1924.30
8+
  2585.3 4   C (11)     109.8 3 
  100
D
  2475.55
10-
  2834.2 5 ?  C (12)     248.9 3 
  100
D
  2585.3
(11)
  3131.5 5   C 12+     596.9 3 
  100
E2
  2534.6
10+
  3362.0 5   C (13)     527.8 2 
  776.6 3 
  100
   91
D
E2
  2834.2
  2585.3
(12)
(11)
  3887.5 6 ?  C (14)     525.5 3 
  100
D
  3362.0
(13)
  4129.8 9   C (15) 11 ns 2    242 1 
  768 1 
 
 


  3887.5
  3362.0
(14)
(13)

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

M(γ): From α(K)exp and α(L)exp in 1981Ri02 and 2008An01, unless otherwise stated. See 1981Ho29 for additional support from γ(θ) data

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   575.30 2+     575.3 1 E20.0254α=0.0254 4, α(K)=0.01790 25, α(L)=0.00565 8, α(M)=0.001421 20, α(N)=0.000370 5, α(O)=7.81×10-5 11, α(P)=1.022E-5 14
  1134.30 4+     559.0 1 E20.0271α=0.0271 4, α(K)=0.01894 27, α(L)=0.00615 9, α(M)=0.001550 22, α(N)=0.000403 6, α(O)=8.51×10-5 12, α(P)=1.109E-5 16
  1762.90 6+ 1.8 ns 13    628.6 1 E20.02091B(E2)(W.u.)=0.04 4, α=0.02091 29, α(K)=0.01508 21, α(L)=0.00438 6, α(M)=0.001094 15, α(N)=0.000285 4, α(O)=6.03E-5 8, α(P)=7.99E-6 11
  1818.30 (6)+     684.0 1 E20.01744α=0.01744 24, α(K)=0.01283 18, α(L)=0.00347 5, α(M)=0.000861 12, α(N)=0.0002242 31, α(O)=4.76×10-5 7, α(P)=6.38E-6 9
  1924.30 8+ 6.3 ns 24    161.4 1 E21.159B(E2)(W.u.)=5.3 20, α=1.159 16, α(K)=0.2488 35, α(L)=0.672 10, α(M)=0.1804 26, α(N)=0.0470 7, α(O)=0.00953 14, α(P)=0.001080 15
  2206.90 (7,8)+     282.6 1 M10.704α=0.704 10, α(K)=0.570 8, α(L)=0.1021 14, α(M)=0.02423 34, α(N)=0.00631 9, α(O)=0.001382 19, α(P)=0.0002017 28
  2269.89 9-     345.6 1 E10.02418α=0.02418 34, α(K)=0.01967 28, α(L)=0.00344 5, α(M)=0.000813 11, α(N)=0.0002102 29, α(O)=4.52×10-5 6, α(P)=6.27E-6 9
  2475.55 10- 65 ns 5    205.7 2 M11.701B(M1)(W.u.)=1.03×10-5 8, α=1.701 24, α(K)=1.375 20, α(L)=0.2478 35, α(M)=0.0588 8, α(N)=0.01533 22, α(O)=0.00336 5, α(P)=0.000490 7
10- 65 ns 5    551.2 2 M20.317B(M2)(W.u.)=0.058 5, α=0.317 4, α(K)=0.2447 34, α(L)=0.0543 8, α(M)=0.01330 19, α(N)=0.00349 5, α(O)=0.000760 11, α(P)=0.0001096 15
  2534.6 10+     610.3 2 E20.02230α=0.02230 31, α(K)=0.01596 22, α(L)=0.00476 7, α(M)=0.001192 17, α(N)=0.000310 4, α(O)=6.57×10-5 9, α(P)=8.66E-6 12
  3131.5 12+     596.9 3 E20.02342α=0.02342 33, α(K)=0.01666 23, α(L)=0.00508 7, α(M)=0.001273 18, α(N)=0.000331 5, α(O)=7.00×10-5 10, α(P)=9.21E-6 13
  3362.0 (13)     776.6 3 E20.01340α=0.01340 19, α(K)=0.01011 14, α(L)=0.002484 35, α(M)=0.000611 9, α(N)=0.0001591 22, α(O)=3.40×10-5 5, α(P)=4.61E-6 6

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  1924.308+ 6.3 ns 24  μ=6.6 4
Configuration=π(h9/2+2).
  2475.5510- 65 ns 5  μ=11.20 10
Configuration=π(f7/2+1,i13/2+1).
  4129.8(15) 11 ns 2  Possible configuration=π(h9/2+3,i13/2+1). The assignment is tentative.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   575.30   575.3M(γ): α(K)exp=0.013 5 (1981Ri02); α(K)exp=0.018 4 and α(L)exp=0.0068 16 (2008An01)
  1134.30   559.0M(γ): α(K)exp=0.015 5 (1981Ri02); α(K)exp=0.027 7 and α(L)exp=0.0076 18 (2008An01)
  1762.90   628.6M(γ): α(K)exp=0.016 5 (1981Ri02); α(K)exp=0.011 3 and α(L)exp=0.0016 4 (2008An01)
  1818.30   684.0M(γ): α(K)exp=0.017 4 (2008An01). From γ(θ) in 1981Ho29
  1924.30   161.4M(γ): α(L)exp=0.65 7 (1981Ri02)
  2206.90   282.6M(γ): α(K)exp=0.51 7 (1981Ri02)
  2269.89   345.6M(γ): α(K)exp=0.010 3 and α(L)exp=0.0097 23 (2008An01)
  2475.55   205.7E(γ): From (HI,xnγ)
I(γ): From I(γ+ce) in 1981Ho29 and corrected by α(M1)=1.185 from 1978Ro21.. From (HI,xnγ)
M(γ): Other: from total α deduced from intensity balance in γγ coin studies in 1981Ho29. From γ(θ) in 1981Ho29
   551.2E(γ): From (HI,xnγ)
I(γ): From I(γ+ce) in 1981Ho29 and corrected by α(M2)=0.333 from 1978Ro21. From (HI,xnγ)
M(γ): α(K)exp=0.20 5 (2008An01)
  2534.6   610.3E(γ): From (HI,xnγ)
I(γ): From (HI,xnγ)
M(γ): From γ(θ) in 1981Ho29
  2585.3   109.8E(γ): From (HI,xnγ)
I(γ): From (HI,xnγ)
M(γ): A2=-0.20 13 and -0.11 37 in 1981Ho29
  2834.2   248.9E(γ): From (HI,xnγ)
I(γ): From (HI,xnγ)
M(γ): From γ(θ) in 1981Ho29
  3131.5   596.9E(γ): From (HI,xnγ)
I(γ): From (HI,xnγ)
M(γ): α(K)exp=0.018 5 (2008An01)
  3362.0   527.8E(γ): From (HI,xnγ)
I(γ): From I(γ+ce) in 1981Ho29 and corrected by α(M1)=0.139 from Rosel (1978Ro21).. From (HI,xnγ)
M(γ): From γ(θ) in 1981Ho29
   776.6E(γ): From (HI,xnγ)
I(γ): From I(γ+ce) in 1981Ho29 and corrected by α(E2)=0.0136 from 1978Ro21. From (HI,xnγ)
M(γ): From γ(θ) in 1981Ho29
  3887.5   525.5E(γ): From (HI,xnγ)
I(γ): From (HI,xnγ)
M(γ): From γ(θ) in 1981Ho29
  4129.8   242E(γ): From 1981Ho29
   768E(γ): From 1981Ho29

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