Computation of diatomic molecular spectra for selected transitions of aluminum monoxide, cyanide, diatomic carbon, and titanium monoxide

CN and C2 vibrational spectra analysis in molecular LIBS of organic materials

“…The vibrational temperatures for CN violet and C 2 Swan bands systems were determined by a least-square fitting program NMT applying the Nelder-Mead algorithm, developed at the University of Tennessee Space Institute [35][36][37][38][39]. This program is used in producing theory spectra for the selected diatomic molecular transitions and wavelength regions.…”

“…This program is used in producing theory spectra for the selected diatomic molecular transitions and wavelength regions. It uses accurate line strengths (Hönl-London) factors, along with temperature and full-width halfmaximum (FWHM) values as inputs [35][36][37][38][39]. For instance, Fig.…”

“…The experimental data show good agreement with the fitted spectra as they nearly overlap. With the good matching for both the vibrational and rotational parts of the spectra, indication is given that local thermodynamic equilibrium (LTE) can be inferred for those cases, as LTE allows for T = T vib = T rot [37][38][39]. Also, by fitting the experimental spectra to computersimulated spectra using the NMT program, CN and C 2 vibrational temperatures were determined for urea, thiourea, HTPB and 3,4-diaminobenzoic acid LIBS measurements under various atmospheres, and their values are listed in Table 2.…”

In Memoriam: James O. Hornkohl

“…The apparent difficulties included the battles with the established practice [5] to predict and compute spectra [6] and design programs [7] despite the mathemetical inconsistencies asscoiated with the reversed angular momentum practice.…”

Experimental Study of the Transient Response of Bunsen Flame to Nanosecond Pulsed Discharges

“…Similar to Refs. [31,35,36], the high temperature emission spectra of CN violet band in the plasma were recorded and analyzed. As shown in Fig.…”