Laser and Fourier Transform Spectroscopy of the [23.8]1-X0+ System of ReN

Emission Spectroscopy and Ab Initio Calculations on IrN

“…Like several diatomic transition metal oxides (1-4) and hydrides (5)(6)(7)(8), transition metal nitrides are also of potential astrophysical importance. For the 5d transition metal nitride family, highresolution data are available for HfN (9), WN (10), ReN (11,12), OsN (13), IrN (14,15), and PtN (16,17). In spite of this experimental interest, no theoretical calculations are available for the 5d transition metal nitrides, except for PtN (18).…”

Fourier transform emission spectroscopy of some new bands of ReN

“…The experimental method and conditions for the observation of ReN bands have been provided in our previous paper [6]. Briefly, the molecules were produced in a rhenium hollow cathode lamp operated at 300 V and 457 mA current.…”

“…In the last few years, considerable progress has been made in the study of ReN. The first observation of ReN was made in 1994 [6] when a DX = 1 transition assigned as [23.8]1-X0 + , was observed near 23 746 cm À1 using Fourier transform emission spectroscopy as well as pulsed dye laser excitation spectroscopy. It was concluded that the X0 + state was the ground state of ReN since this transition was also observed in the laser excitation experiments.…”

“…This work provided the location of an X = 1 state at 2630 ± 100 cm À1 above the ground state, which is probably the lower state of the two transitions observed in the present study. More recently ReN molecules were produced by Zhou and Andrews [9] by the reaction of laser ablated rhenium atoms with nitrogen and the fundamental band of ReN was measured in an N 2 matrix at 10 and 20 K providing a ground state vibrational interval close to the gas phase value [6]. In another study the high-resolution laser induced fluorescence spectra of ReN were recorded with a laser ablation/molecular beam spectrometer by Steimle and Virgo [10] and the (0, 0) band of the [26.0]0 + -X0 + system of ReN was investigated in the presence of an electric field.…”

Fourier transform spectroscopy of new emission systems of NbN in the visible region

“…So far nitride molecules have not been observed in stellar atmospheres, in part due to lack of precise spectroscopic data required for a meaningful search in the complex stellar spectra. In recent years, the electronic spectra of several transition metal nitrides have been analyzed at high resolution [4][5][6][7][8][9][10][11][12][13][14][15] and considerable progress has been made in theoretical studies [15][16][17][18][19][20][21][22][23][24].…”