ADOPTED LEVELS, GAMMAS for 181Hg

Author: S. -c. Wu |  Citation: Nucl. Data Sheets 106, 367 (2005) |  Cutoff date: 31-Aug-2005 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-7862 keV 18S(n)= 8482 keV 20S(p)= 2.36×103 keV 3Q(α)= 6284 keV 5
Reference: 2012WA38

References:
  A  185Pb α decay (6.3 S)  B  185Pb α decay (4.3 S)
  C  144Sm(40Ar,3nγ) 

General Comments:

For isotope shift data, see 1976Bo09 and 1986Ul02.

Levels: band(b) 5/2[512] band, α=-1/2. No signature splitting and very gradual alignment (as for 5/2[512] bands in n=101 isotones, where bandheads lie at 100-150 keV); B(M1)/B(E2) for ΔJ=1 and ΔJ=2 inband transitions from levels in this band indicate assignment of 5/2[512] orbital rather than the 7/2[514] orbital known in heavier Hg isotopes.

Levels: band(c) 7/2[633] band, α=-1/2. Probably analogous to mixed (ν i13/2) bands in 183Hg, 185Hg and 187Hg except that, here, the 7/2[633] rather than the 9/2[624] orbital is the predominant one. Prolate deformed structure.

Q-value: Note: Current evaluation has used the following Q record









E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
M(γ)Final Levels
     0.0A C 1/2- 3.6 s 1 
% ε = 73 2
% εα = 9×10-6 6
% α = 27 2
% εp = 0.013 3
    
     0.0+X  C (7/2-)       
     0.0+Y BC 13/2+       
    64A   3/2-      64S
[E2]
     0.0
1/2-
    75.2+Y 13   C (11/2+)       
    80.5 10   C (5/2-)      80.5

     0.0
1/2-
    90.7+X 13   C (9/2-)       
   248.4+X 10   C (11/2-)     157.7
  248.4


    90.7+X
     0.0+X
(9/2-)
(7/2-)
   263.9 15   C (9/2-)     183.4

    80.5
(5/2-)
   269A   3/2-     205 1 
  269 1 
M1
M1
    64
     0.0
3/2-
1/2-
   315.7+Y 8   C (15/2+)     240.5
  315.7


    75.2+Y
     0.0+Y
(11/2+)
13/2+
   400.1+X 13   C (13/2-)     151.7
  309.4


   248.4+X
    90.7+X
(11/2-)
(9/2-)
   416.8+Y 8   C (17/2+)     101.1
  416.8


   315.7+Y
     0.0+Y
(15/2+)
13/2+
   535.2 18   C (13/2-)     271.3

   263.9
(9/2-)
   575.7+X 13   C (15/2-)     175.6
  327.3


   400.1+X
   248.4+X
(13/2-)
(11/2-)
   656.3+Y 10   C (19/2+)     239.5
  340.6


   416.8+Y
   315.7+Y
(17/2+)
(15/2+)
   766.3+X 14   C (17/2-)     190.6
  366.2


   575.7+X
   400.1+X
(15/2-)
(13/2-)
   794.2+Y 11   C (21/2+)     137.9
  377.4


   656.3+Y
   416.8+Y
(19/2+)
(17/2+)
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
M(γ)Final Levels
   889.7 20   C (17/2-)     354.5

   535.2
(13/2-)
   979.5+X 15   C (19/2-)     213.2
  403.8


   766.3+X
   575.7+X
(17/2-)
(15/2-)
  1083.9+Y 12   C (23/2+)     289.7
  427.6


   794.2+Y
   656.3+Y
(21/2+)
(19/2+)
  1198.6+X 17   C (21/2-)     432.3

   766.3+X
(17/2-)
  1238.2+Y 15   C (25/2+)     444.0

   794.2+Y
(21/2+)
  1325.3 23   C (21/2-)     435.6

   889.7
(17/2-)
  1453.6+X 18   C (23/2-)     474.1

   979.5+X
(19/2-)
  1587.9+Y 16   C (27/2+)     504.0

  1083.9+Y
(23/2+)
  1691.1+X 20   C (25/2-)     492.5

  1198.6+X
(21/2-)
  1749.4+Y 18   C (29/2+)     511.2

  1238.2+Y
(25/2+)
  1835.9 25   C (25/2-)     510.6

  1325.3
(21/2-)
  1987.0+X 21   C (27/2-)     533.4

  1453.6+X
(23/2-)
  2161.0+Y 19   C (31/2+)     573.1

  1587.9+Y
(27/2+)
  2240.6+X 22   C (29/2-)     549.5

  1691.1+X
(25/2-)
  2323.2+Y 21   C (33/2+)     573.8

  1749.4+Y
(29/2+)
  2411 3   C (29/2-)     575.2

  1835.9
(25/2-)
  2786.0+Y 21 ?  C (35/2+)     625.0?

  2161.0+Y
(31/2+)
  2952.7+Y 23 ?  C (37/2+)     629.5?

  2323.2+Y
(33/2+)

E(level): From least-squares adjustment of Eγ, allowing ΔEγ=1 keV for all transitions, except as noted.

Jπ(level): Values given without comment are from (40Ar,3nγ), based on unenumerated DCO ratios, level systematics for heavier Hg isotopes and deduced band structure.

E(γ): From (40Ar,3nγ); uncertainties unstated by authors.

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)M(γ)Final Levels
Band 1 - 1/2[521] band, α=+1/2.
     0.0 1/2- 3.6 s 1 
% ε = 73 2
% εα = 9×10-6 6
% α = 27 2
% εp = 0.013 3
    
    80.5 10  (5/2-)       
   263.9 15  (9/2-)       
   535.2 18  (13/2-)     271.3

   263.9
(9/2-)
   889.7 20  (17/2-)       
  1325.3 23  (21/2-)     435.6

   889.7
(17/2-)
  1835.9 25  (25/2-)       
  2411 3  (29/2-)     575.2

  1835.9
(25/2-)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)M(γ)Final Levels
Band 2 - 5/2[512] band, α=+1/2.
    90.7+X 13  (9/2-)       
   400.1+X 13  (13/2-)       
   766.3+X 14  (17/2-)       
  1198.6+X 17  (21/2-)     432.3

   766.3+X
(17/2-)
  1691.1+X 20  (25/2-)       
  2240.6+X 22  (29/2-)     549.5

  1691.1+X
(25/2-)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)M(γ)Final Levels
Band 3 - 7/2[633] band, α=+1/2.
   416.8+Y 8  (17/2+)       
   794.2+Y 11  (21/2+)       
  1238.2+Y 15  (25/2+)       
  1749.4+Y 18  (29/2+)     511.2

  1238.2+Y
(25/2+)
  2323.2+Y 21  (33/2+)       
  2952.7+Y 23  (37/2+)     629.5?

  2323.2+Y
(33/2+)

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.01/2- 3.6 s 1 
% ε = 73 2
% εα = 9×10-6 6
% α = 27 2
% εp = 0.013 3
μ=+0.5071 7
Δ<r2>(198-181)=-0.095 3 (1986Ul02).
E(level): Δ<r2>(198-181)=-0.095 3 (1986Ul02). 1/2[521] band, α=+1/2. Includes contribution from Hg Kβ| x ray.
T1/2(level): From 6006α(t) (1979Ha10). Note that the flag attributing this datum to 1970Ha18 in table 1 of 1979Ha10 almost certainly belongs with the datum for I(6006α)/Iα(total). Other data: 3.6 s 3 (1969Ha03), 3.6 s 3 (1970Ha18), 3.2 s 7 (1982HeZM), 3.3 s 4 (1979Ha10), 3.4 s 3 (for each of three lines, 1979Ha10). The weighted average of all data is 3.54 s 8, and the unweighted average is 3.44 s 5.
     0.0+Y13/2+   Probably the oblate deformed i13/2 isomeric state known in A|>185 odd-A Hg isotopes.
E(level): Probably the oblate deformed i13/2 isomeric state known in A|>185 odd-A Hg isotopes.
    80.5(5/2-)   E(level): 1/2[521] band, α=+1/2.
    90.7+X(9/2-)   E(level): 5/2[512] band, α=+1/2.
   263.9(9/2-)   E(level): 1/2[521] band, α=+1/2.
   400.1+X(13/2-)   E(level): 5/2[512] band, α=+1/2.
   416.8+Y(17/2+)   E(level): 7/2[633] band, α=+1/2.
   535.2(13/2-)   E(level): 1/2[521] band, α=+1/2.
   766.3+X(17/2-)   E(level): 5/2[512] band, α=+1/2.
   794.2+Y(21/2+)   E(level): 7/2[633] band, α=+1/2.
   889.7(17/2-)   E(level): 1/2[521] band, α=+1/2.
  1198.6+X(21/2-)   E(level): 5/2[512] band, α=+1/2.
  1238.2+Y(25/2+)   E(level): 7/2[633] band, α=+1/2.
  1325.3(21/2-)   E(level): 1/2[521] band, α=+1/2.
  1691.1+X(25/2-)   E(level): 5/2[512] band, α=+1/2.
  1749.4+Y(29/2+)   E(level): 7/2[633] band, α=+1/2.
  1835.9(25/2-)   E(level): 1/2[521] band, α=+1/2.
  2240.6+X(29/2-)   E(level): 5/2[512] band, α=+1/2.
  2323.2+Y(33/2+)   E(level): 7/2[633] band, α=+1/2.
  2411(29/2-)   E(level): 1/2[521] band, α=+1/2.
  2952.7+Y(37/2+)   E(level): 7/2[633] band, α=+1/2.

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Additional Gamma Comments:

E(level)E(gamma)Comments
    80.5    80.5E(γ): Includes contribution from Hg Kβ| x ray.
   248.4+X   248.4E(γ): Based on width of transition drawn in the level scheme of 1997Va17, this is the stronger of the pair of γ’s deexciting the parent level.
   269   205M(γ): α(K)=1.2 3 if the observed K X-rays result from the 205 keV γ’s only(2002An15)
   269M(γ): α(K)=0.65 15 if the observed K X-rays result from the 269 keV γ’s only(2002An15)
   400.1+X   309.4E(γ): Based on width of transition drawn in the level scheme of 1997Va17, this is the stronger of the pair of γ’s deexciting the parent level.
   416.8+Y   416.8E(γ): Based on width of transition drawn in the level scheme of 1997Va17, this is the stronger of the pair of γ’s deexciting the parent level.
   575.7+X   327.3E(γ): Based on width of transition drawn in the level scheme of 1997Va17, this is the stronger of the pair of γ’s deexciting the parent level.
   656.3+Y   340.6E(γ): Based on width of transition drawn in the level scheme of 1997Va17, this is the stronger of the pair of γ’s deexciting the parent level.
   766.3+X   366.2E(γ): Based on width of transition drawn in the level scheme of 1997Va17, this is the stronger of the pair of γ’s deexciting the parent level.
   794.2+Y   377.4E(γ): Based on width of transition drawn in the level scheme of 1997Va17, this is the stronger of the pair of γ’s deexciting the parent level.
   979.5+X   403.8E(γ): Based on width of transition drawn in the level scheme of 1997Va17, this is the stronger of the pair of γ’s deexciting the parent level.
  1083.9+Y   427.6E(γ): Based on width of transition drawn in the level scheme of 1997Va17, this is the stronger of the pair of γ’s deexciting the parent level.

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