Λ-Splittings and Line Intensities in the First Overtone of Nitric Oxide

Intensities of line features in vibration-rotational bands 2–0 to 6–0 of 14N16O X2Π and experimental evaluation of a radial function for electric dipolar moment

“…In each case the polarities, À NO + and À CO + , at that condition Table 4 Values of quantum number J 00 for total angular momentum of the lower state of a vibration-rotational transition in band 5-0, wave number/m À1 of each apparent line in branches P, Q and R, and line strength S l /10 À28 m observed and calculated for 14 Table 6, is consistent with the most recent result, S b = (1.52 ± 0.08) · 10 À23 m, from measurements on samples with He or Ar at pressures large enough to obliterate rotational structure [21]. Like our independent reproduction of the strength of band 2-0 [7], this agreement confirms the efficacy of our procedure of measurement involving fitting, with a mixed gaussian and lorentzian profile, of Table 5 Values of quantum number J 00 for total angular momentum of the lower state of a vibration-rotational transition in band 6-0, wave number/m À1 of each apparent line in branches P, Q and R, and line strength S l /10 À28 m observed and calculated for 14 each perceived feature that comprises two lines in close proximity, each of which has hyperfine structure due to coupling of rotational and angular momenta and the nuclear quadrupolar moment of 14 N. As already explained, our value of the strength of band 3-0 results from an accurate ratio with band 2-0. Our strength of band 2-0 is also consistent with a measurement of matrix element for band 3-1 [9], which implies a corresponding matrix element (2.284 ± 0.029) · 10 À32 C m for band 2-0.…”

“…From a direct sum of these strengths S l of lines according to formula (3) for a particular band we estimated a strength of each band S b . In the case of band 2-0, the resulting value was about 6 per cent less than one published value [6], but the same, within experimental error, as another published value [7], either of which might be expected to be accurate; although problems with sample handling and adsorption of NO on surfaces within the large gas cell might slightly affect our measurements of that band, our independent coincidence with the later published result supports the correctness of that value [7]. Because we used the same samples of NO for corresponding measurements of band 3-0, for which only the length of optical path varied through an increased number of passes of the light through the cell, the strength of band 3-0 is as accurate as that of band 2-0; for the same reason ratios of bands 4, 5, 6-0 are likewise accurate.…”

“…Previously reported measurements [1][2][3] of intensities of vibration-rotational bands of NO were based on gross features as a result of broadening through use of gaseous samples at large pressures, with these pertinent exceptions: there exist two independent measurements [4,5] of individual lines or features in the fundamental band, 1-0, two separate measurements of individual lines in the first overtone [6,7], 2-0, and single measurements of a band originating in m 00 = 1 in the sequence with Dm = 1, or band 2-1 [8], and a band originating in m 00 = 1 in the sequence with Dm = 2, or band 3-1 [9], with our own previous work on bands 5-0 [10] and 6-0 [11]. We have reanalysed the latter spectra, and here combine those data with fresh measurements on bands 2-0, 3-0 and 4-0 in a consistent manner to derive p(R) according to an established method [12].…”

Λ-Splittings and Line Intensities in the 3 ← 1 Hot Band of14N16O: The Spectrum of Nitric Oxide in the First Overtone Region

“…On the contrary, absorption spectra are better suited to of Henry et al (9), who studied line positions in the 3 R 0 perform such measurements. In this aim, among the spectra second overtone under a resolution of 0.02 cm 01 , the L-recorded at Reims with the GSMA interferometer (11) in a doubling being not resolved, except for two lines of a Q previous work (8), those having the greatest optical thickbranch. Later on, Hallin et al (4) studied the 3 R 1 hot ness (see Table 1) could be advantageously used to retrieve band in the first overtone region, from discharge emission intensities for lines belonging to the 3 R 1 band.…”

Infia?program for rotational analysis of linear molecule spectra

“…The intensity fitness function is not as a clear measure of the quality of the combination as the regular fitness function, F, due to the low accuracy of the peak intensity measurements relative to the wave number measurements. One should also be aware that effects, such as Coriolis resonance 13 or the Herman᎐Wallace effect, 14,15 can disturb the intensities in a way that is not taken Ž . into account by eq.…”