ADOPTED LEVELS, GAMMAS for 206Hg

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-)=1308 keV 20S(n)= 6729 keV 21S(p)= 9660 keV SYQ(α)= -680 keV 30
Reference: 2021WA16

References:
  A  206Au β- decay  B  210Pb α decay
  C  9Be(208Pb,xγ)  D  9Be(238U,xγ)
  E  204Hg(t,pγ)  F  204Hg(18O,16OG)
  G  238U(208Pb,xγ)  H  Coulomb Excitation








E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0ABCDEFGH 0+ 8.32 m 13 
% β- = 100
     
  1068.20 20 A CDEFGH 2+ 1.27 ps 17    1068.2 2 
  100
E2
     0.0
0+
  2102.4 3 A CDEFG  5- 2.09 µs 2    1034.2 2 
  100
E3
  1068.20
2+
  2465.8 6   CD  G  (7-)      363.4 5 
  100

  2102.4
5-
  2705.2 20        H (3-) 0.51 ns +39-13    1637 2 
  100
[E3]
  1068.20
2+
  3622.1 7   CD  G  (8+)     1156.3 5 
  100

  2465.8
(7-)
  3625    E    0+        
  3723.0 7   CD  G  (10+) 106 ns 5     100.9 5 
  1257.2 5 
   49 5 
  100 5 
[E2]
[E3]
  3622.1
  2465.8
(8+)
(7-)
  4605.8 11       G  (10+)      883 1 
  100

  3723.0
(10+)
  4987.1 11       G  (11+)      381 1 
  1264 1 
 
 


  4605.8
  3723.0
(10+)
(10+)
  5643.4 11       G  (12+)      656 1 
  1038 1 
 
 


  4987.1
  4605.8
(11+)
(10+)
  6067.2 11       G  (13-)      424 1 
  2344 1 
 
 


  5643.4
  3723.0
(12+)
(10+)
  6276.2 15 ?      G       209 1 
  100

  6067.2
(13-)

E(level): From a least-squares fit to Eγ, unless otherwise stated

Jπ(level): From deduced transition multipolarities (204Hg(t,pγ)) using γ(θ) in 1982Be38 and 1984Ma43, and L values in 1978Fl08, 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
  1068.20 2+ 1.27 ps 17    1068.2 2 E20.00531B(E2)(W.u.)=4.4 6, α=0.00531 7, α(K)=0.00429 6, α(L)=0.000782 11, α(M)=0.0001840 26, α(N)=4.60E-5 6, α(O)=8.54E-6 12, α(P)=5.62E-7 8
  2102.4 5- 2.09 µs 2    1034.2 2 E30.01283B(E3)(W.u.)=0.1799 17, α=0.01283 18, α(K)=0.00969 14, α(L)=0.002390 33, α(M)=0.000581 8, α(N)=0.0001455 20, α(O)=2.66E-5 4, α(P)=1.442E-6 20
  2705.2 (3-) 0.51 ns +39-13    1637 2 [E3]0.00483B(E3)(W.u.)=30 +10-13, α=0.00483 7
  3723.0 (10+) 106 ns 5     100.9 5 [E2]5.34B(E2)(W.u.)=0.84 5, α=5.34 14, α(K)=0.614 9, α(L)=3.53 10, α(M)=0.924 25, α(N)=0.229 6, α(O)=0.0380 10, α(P)=0.0001148 22
(10+) 106 ns 5    1257.2 5 [E3]0.00832B(E3)(W.u.)=0.223 22, α=0.00832 12, α(K)=0.00648 9, α(L)=0.001400 20, α(M)=0.000336 5, α(N)=8.42E-5 12, α(O)=1.552E-5 22, α(P)=9.36E-7 13

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 8.32 m 13 
% β- = 100
Measured radius relative to that of 198Hg: δ<r2>(206Hg,198Hg)=+0.409 fm2 3(stat) 29(syst) (2021Da01). Other: 1986Ul02.
  1068.202+ 1.27 ps 17  Configuration=π(s1/2-1,d3/2-1).
  2102.45- 2.09 µs 2  Q=0.74 15, μ=5.45 5
Configuration=π(s1/2-1,h11/2-1).
  2465.8(7-)   Configuration=π(d3/2-1,h11/2-1).
Jπ(level): From 238U(208Pb,xγ) (2001Fo08). The assignment is tentative.
  3622.1(8+)   Configuration=π(h11/2-2). The assignment is tentative.
Jπ(level): From 238U(208Pb,xγ) (2001Fo08). The assignment is tentative.
  3723.0(10+) 106 ns 5  Configuration=π(h11/2-2).
Jπ(level): From 238U(208Pb,xγ) (2001Fo08). The assignment is tentative.
  4605.8(10+)   Configuration=ν(g9/2,i13/2-1). The assignment is tentative.
Jπ(level): From 238U(208Pb,xγ) (2001Fo08). The assignment is tentative.
  4987.1(11+)   Configuration=ν(g9/2,i13/2-1). The assignment is tentative.
Jπ(level): From 238U(208Pb,xγ) (2001Fo08). The assignment is tentative.
  5643.4(12+)   Configuration=π(d3/2-1,h11/2-1)7- ν(g9/2p1/2-1)5-. The assignment is tentative.
Jπ(level): From 238U(208Pb,xγ) (2001Fo08). The assignment is tentative.
  6067.2(13-)   Configuration=ν(h11/2-2)10+ coupled to 3- octupole phonon. The assignment is tentative.
Jπ(level): From 238U(208Pb,xγ) (2001Fo08). The assignment is tentative.
  6276.2   XREF: γ(?).

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Additional Gamma Comments:

E(level)E(gamma)Comments
  1068.20  1068.2M(γ): From A2=+0.22 2 in 204Hg(t,pγ) (1982Be38). The positive sign argues against a ΔJ=1 transition; Mult.=M2 is excluded from systematics of first excited states in neighboring even-even nuclei
  2102.4  1034.2M(γ): A2=0.38 5 in 204Hg(t,pγ) (1982Be38). The measured ratio of A2(1068γ)/A2(1034γ)=0.58 9 is consistent with a J=5 to 2 transition for which A2(2 to 0)/A2(5 to 2)=0.6 can be expected, while A2(2 to 0)/A2(4 to 2)=1.0 could be expected if 1034γ were E2 (1982Be38)
  2465.8   363.4E(γ): From 9Be(208Pb,xγ) (2011St21)
I(γ): From 9Be(208Pb,xγ) (2011St21)
  3622.1  1156.3E(γ): From 9Be(208Pb,xγ) (2011St21)
I(γ): From 9Be(208Pb,xγ) (2011St21)
  3723.0   100.9E(γ): From 9Be(208Pb,xγ) (2011St21)
I(γ): From I(γ+ce)(100γ)/I(γ+ce)(1257γ)=3.2 3, determined using the I(γ+ce)(1157γ)/I(γ+ce)(1257γ) ratio in (HI,xnγ) (2001Fo08)
  1257.2E(γ): From 9Be(208Pb,xγ) (2011St21)
  4605.8   883E(γ): From 238U(208Pb,xγ) (2001Fo08)
I(γ): From 238U(208Pb,xγ) (2001Fo08)
  4987.1   381E(γ): From 238U(208Pb,xγ) (2001Fo08)
  1264E(γ): From 238U(208Pb,xγ) (2001Fo08)
  5643.4   656E(γ): From 238U(208Pb,xγ) (2001Fo08)
  1038E(γ): From 238U(208Pb,xγ) (2001Fo08)
  6067.2   424E(γ): From 238U(208Pb,xγ) (2001Fo08)
  2344E(γ): From 238U(208Pb,xγ) (2001Fo08)
  6276.2   209E(γ): From 238U(208Pb,xγ) (2001Fo08)
I(γ): From 238U(208Pb,xγ) (2001Fo08)

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