Françoise Michaud,1
Françoise Roux,1
Sumner P. Davis,2
and An-Dien Nguyen2
1Laboratoire de Spectrométrie Ionique et Moléculaire, Université Claude Bernard Lyon I, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France;
2Department of Physics, University of California, Berkeley, California 94720. USA
A new perturbation analysis of the first negative system B2∑u+ → X2∑g+ of the 14N2+ ion is performed based on spectra excited both at low and high temperatures by the use of either a hollow-cathode or a Pointolite lamp. Preliminary results are given for a deperturbation of the B2∑u+ (v = 0, v = 1) levels. Deperturbed molecular constants and parameters that describe the B2∑u+ ~ A2Πu interaction are derived.
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Jc′ is the value for which the B2∑+ and A2Π levels would be degenerate in the absence of any interaction.
Indicates the largest shift in energy levels (N′) produced by the 2∑−2Π interaction at each crossing point.
Table 2
B2∑ (v = 1) ~ A2Π (v = 11, v = 12, v = 13) Perturbations
Jc′ is the value for which the B2∑+ and A2Π levels would be degenerate in the absence of any interaction.
Indicates the largest shift in energy levels (N′) produced by the 2∑−2Π interaction at each crossing point.
Table 3
Molecular Parameters of the B2∑u+ State of 14N2+ (cm−1)a
Values in parentheses are the uncertainties in the last digits that correspond to two standard deviations.
The origin of T is the energy of the X2∑ (v = 0, J = 1/2) F1 level.
γ″ (X2∑+) fixed values (see Table 5).
Distorsion parameters: αeJ = − 0.90 × 10−3 (4) cm−1, βeJ = 0.217 × 10−4 (4). The results are from simultaneous fits of the 0–0, 0–1, 0–2, 1–0, 1–1, 1–2, 1–3, and 1–4 bands (rms ~ 0.009 cm−1). The band origins (in inverse centimeters) are ν0 (0–0) = 25,566.058, ν0 (0–1) = 23,391.310, ν0 (0–2) = 21,249.068, ν0 (1–0) = 27,937.684, ν0 (1–1) = 25,762.936, ν0 (1–2) = 23,620.700, ν0 (1–3) = 25,511.230, ν0 (1–4) = 19,434.782.
Table 4
Equilibrium Molecular Constants of the A2Πu state of 14N2+ (cm−1)a
Values in parentheses are the uncertainties in the last digits that correspond to two standard deviations. Values in square brackets are fixed parameters.
The origin of T is the energy of the X2∑ (v = 0, J = 1/2) F1 level.
Taken from Ref. 19.
Calculated by fitting a first-degree polynomial to A and D values of high vibrational levels v = 8 → 13 (data from Refs. 12–17). Aj are fixed to 2.4 × 10−5 (fitted value from the data of Refs. 12–17). Aj j are set equal to zero. H are fixed to −3.45 × 10−12 (calculated values of Ref. 3).
Table 5
Molecular Parameters of the X2∑g+ state of 14N2+ (cm−1)a
Values in parentheses are the uncertainties in the last digits that correspond to two standard deviations. T fixed values.19 The origin of T is the energy of the X2∑ (v = 0, J = 1/2) F1 level.
γ fixed values.11–20H are set equal to zero.
Jc′ is the value for which the B2∑+ and A2Π levels would be degenerate in the absence of any interaction.
Indicates the largest shift in energy levels (N′) produced by the 2∑−2Π interaction at each crossing point.
Table 2
B2∑ (v = 1) ~ A2Π (v = 11, v = 12, v = 13) Perturbations
Jc′ is the value for which the B2∑+ and A2Π levels would be degenerate in the absence of any interaction.
Indicates the largest shift in energy levels (N′) produced by the 2∑−2Π interaction at each crossing point.
Table 3
Molecular Parameters of the B2∑u+ State of 14N2+ (cm−1)a
Values in parentheses are the uncertainties in the last digits that correspond to two standard deviations.
The origin of T is the energy of the X2∑ (v = 0, J = 1/2) F1 level.
γ″ (X2∑+) fixed values (see Table 5).
Distorsion parameters: αeJ = − 0.90 × 10−3 (4) cm−1, βeJ = 0.217 × 10−4 (4). The results are from simultaneous fits of the 0–0, 0–1, 0–2, 1–0, 1–1, 1–2, 1–3, and 1–4 bands (rms ~ 0.009 cm−1). The band origins (in inverse centimeters) are ν0 (0–0) = 25,566.058, ν0 (0–1) = 23,391.310, ν0 (0–2) = 21,249.068, ν0 (1–0) = 27,937.684, ν0 (1–1) = 25,762.936, ν0 (1–2) = 23,620.700, ν0 (1–3) = 25,511.230, ν0 (1–4) = 19,434.782.
Table 4
Equilibrium Molecular Constants of the A2Πu state of 14N2+ (cm−1)a
Values in parentheses are the uncertainties in the last digits that correspond to two standard deviations. Values in square brackets are fixed parameters.
The origin of T is the energy of the X2∑ (v = 0, J = 1/2) F1 level.
Taken from Ref. 19.
Calculated by fitting a first-degree polynomial to A and D values of high vibrational levels v = 8 → 13 (data from Refs. 12–17). Aj are fixed to 2.4 × 10−5 (fitted value from the data of Refs. 12–17). Aj j are set equal to zero. H are fixed to −3.45 × 10−12 (calculated values of Ref. 3).
Table 5
Molecular Parameters of the X2∑g+ state of 14N2+ (cm−1)a
Values in parentheses are the uncertainties in the last digits that correspond to two standard deviations. T fixed values.19 The origin of T is the energy of the X2∑ (v = 0, J = 1/2) F1 level.
γ fixed values.11–20H are set equal to zero.