Optical emission spectrum of the NO2+ dication

Spectroscopic characterization of a thermodynamically stable doubly charged diatomic molecule: MgAr2+

“…Only very few DIDIs have been characterized by spectroscopic methods which provide quantitative information on their structure. Highresolution, rotationally resolved spectra have been obtained for only three DIDIs, N 2 2+ , [21][22][23][24][25] NO 2+ , 26 and DCl 2+ , 27 and the vibrational structures of about 10 DIDIs have been studied by double-photoionization coincidence methods starting from the ground state of the neutral molecules (see ref. 11 and references therein).…”

Single- and double-photoionization cross sections of nitric oxide (NO) and ionic fragmentation ofNO+andNO2<

“…Previous investigations on NO + include photon and electron-impact ionization mass spectrometry [3 -6], Auger spectroscopy [2,8], translational energy spectroscopy (TES) [9 -12], double-charge-transfer spectroscopy (DCTS) [13,14], photoion-photon of fiuorescence coincidence measurements (PIFCO) [15,16], coincidence measurements of cation pair (PIPICO for photoionization) [17,18], kinetic-energy-release measurements [19,20], observation of emission spectrum [21,22], and theoretical calculations [2,21,23 -27]. An excellent review of theoretical and experimental work on NO + prior to 1986 can be found in Ref.…”

IN MY TIME: Scenes of Scientific Life

“…A mutation occurred when we began to apply synchrotron radiation and coincidence techniques to the study of molecular dications. I had been interested in the possibility of observing the optical spectra of molecular dications since the early observations of N 2+ 2 by Kevin Carroll (148), which remained the only known emission spectrum of a dication until Daniel Cossart observed NO 2+ (149) and, very recently, CO 2+ (39,150). The wide range of photon excitation energies available with synchrotron radiation in Orsay made it possible to envisage other types of studies on multiply charged molecular ions.…”