The spectrum of mercury was photographed in the 400–900-Å region on a 3-m normal-incidence spectrograph using a triggered spark source. The new observations, aided by Hartree–Fock calculations, have led to the complete revision of Hg iv analysis reported in the literature. The ground state of Hg iv has been found to be the 5d9 configuration, with a 2D doublet separation of 15 684.7 cm−1, instead of the 5d86s configuration as reported earlier. Twenty-one levels of the 5d86p configuration have been established, and thirty lines are now classified in the spectrum. Least-squares-fitted calculations support the analysis.
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Parameters T, α1, and α2 fixed at zero in the iteration process.
Parameter fixed in the iteration process. σ = mean error = [(experimental value − calculated value)2/(m − n)1/2, where m is the number of known values and n is the number of free parameters.
Table 4
Energy Levels of the 5d9 and 5d86p Configurations of Hg iv
Parameters T, α1, and α2 fixed at zero in the iteration process.
Parameter fixed in the iteration process. σ = mean error = [(experimental value − calculated value)2/(m − n)]1/2.
Table 6
Observed and Calculated Energy-Level Values (in cm−1) of the 5d86p Configuration of Au iii
Observed
Calculated
Diff.
J = 1/2
–
147 240.0
–
137 706.8
137 800.4
−93.6
125 845.7
125 930.3
−84.6
122 406.6
122 279.2
127.4
113 764.5
114 171.4
−406.9
108 183.4
108 168.7
14.7
104 348.3
105 194.2
−845.9
J = 3/2
–
159 167.2
–
133 059.1
133 511.5
−452.4
128 250.4
128 237.6
12.8
127 467.4
127 424.0
43.4
123 179.1
123 119.1
60.0
121 943.1
122 087.5
−144.4
118 561.5
118 844.8
−283.3
116 892.0
116 037.2
854.8
109 387.6
109 272.1
115.5
106 262.1
106 448.4
−186.3
–
96 486.6
–
102 320.1
101 988.2
331.9
88 786.8
89 117.9
−331.1
J = 9/2
132 352.7
132 132.4
220.3
115 723.5
115 488.4
235.1
115 340.2
114 848.9
491.3
104 564.1
104 568.9
−4.8
91 408.6
91168.5
240.1
J = 5/2
134 952.7
135 545.0
−592.3
128 512.7
128 210.2
302.5
125 768.0
125 494.3
273.7
122 530.1
122 544.2
−14.1
120 027.7
120 099.9
−72.2
115 373.7
115 363.2
10.5
112 879.3
113 185.0
−305.7
108 221.0
108 561.9
−340.9
107 553.6
107 308.2
245.4
101 727.9
101 660.9
67.0
96 094.1
96 528.5
−434.4
J = 7/2
134 890.2
135 266.9
−376.7
130 977.6
130 922.1
55.5
121 825.8
121 787.8
38.0
118 324.8
117 971.9
352.9
116 293.3
116 075.6
217.7
110 984.0
111 506.9
−522.9
105 808.7
106 121.6
−312.8
J = 11/2
127 467.4
126 826.5
640.9
102 992.3
102 159.1
833.2
Tables (6)
Table 1
HF Values of Eav and ζ5d Parameters (in cm−1) for the 5d9, 5d86s, and 5d76s2 Configurations from Ir i to Hg iv
Parameters T, α1, and α2 fixed at zero in the iteration process.
Parameter fixed in the iteration process. σ = mean error = [(experimental value − calculated value)2/(m − n)1/2, where m is the number of known values and n is the number of free parameters.
Table 4
Energy Levels of the 5d9 and 5d86p Configurations of Hg iv
Parameters T, α1, and α2 fixed at zero in the iteration process.
Parameter fixed in the iteration process. σ = mean error = [(experimental value − calculated value)2/(m − n)]1/2.
Table 6
Observed and Calculated Energy-Level Values (in cm−1) of the 5d86p Configuration of Au iii