On the nature of NiAr+

✍ Scribed by Dan Lessen; P.J. Brucat

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 352 KB
• Volume: 152
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(88)80444-5

✦ Synopsis

N&r+ ions generated in a supersonic expansion of Nr+ with a 1% Ar/He carrter gas arc mtccted into a tandem mass spectrometer and photodissociated with visible tunable laser radiation. A photofragmentation feature observed at 17984 cm-' is believed to correspond to the dissociation threshold of NiAr+ to excited state (ZF,,L) Ni+ and ground state Ar. This assignment ytelds a prediction of 0.55 eV for the binding energy (Di) of NiAr +. The "NiAr+ ib"NiAr+ isotope shift of this spectral feature indicates the vibrational frequency in the ground state of NiAr+ to be 235 -t 50 cm-'. Thus NiAr+ is a surprisingly "stiff" and strongly bound diatomic, discussed in light of a simple electrostatic (charge-induced-dipole) model of the internuclear forces in this class of molecules