List of levels for 181HG

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 18	S(n)= 8482 keV 20	S(p)= 2.36×10³ keV 3	Q(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)

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 i_13/2) 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 -7860 18 8488 21 2354 26 6284 4 2003Au03

E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	M(γ)	Final Levels
0.0	A 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	B C	13/2+
64	A	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-)
269	A	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)	XREF	J^π(level)	T_1/2(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 ΔE_γ=1 keV for all transitions, except as noted.

J^π(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.

E(level) (keV)	J^π(level)	T_1/2(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)	J^π(level)	T_1/2(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)	J^π(level)	T_1/2(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+)

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	1/2-	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. T_1/2(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+Y	13/2+		Probably the oblate deformed i_13/2 isomeric state known in A\|>185 odd-A Hg isotopes. E(level): Probably the oblate deformed i_13/2 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.

E(level)	E(gamma)	Comments
80.5	80.5	E(γ): Includes contribution from Hg Kβ\| x ray.
248.4+X	248.4	E(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	205	M(γ): α(K)=1.2 3 if the observed K X-rays result from the 205 keV γ’s only(2002An15)
269	269	M(γ): α(K)=0.65 15 if the observed K X-rays result from the 269 keV γ’s only(2002An15)
400.1+X	309.4	E(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	416.8	E(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	327.3	E(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	340.6	E(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	366.2	E(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	377.4	E(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	403.8	E(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	427.6	E(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.