Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (8): 1575-1580.doi: 10.3866/PKU.WHXB201405202

• PHOTOCHEMISTRY AND RADIATION CHEMISTRY • Previous Articles     Next Articles

Study on the Photodissociation Mechanism of N2O+ via B2ПiX2П Transitions

WU Dan, ZHANG Li-Min, ZHOU Dan-Na   

  1. Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China
  • Received:2014-04-15 Revised:2014-05-20 Published:2014-07-18
  • Contact: ZHANG Li-Min
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21073177).


Photofragment (NO+ and N2+) excitation (PHOFEX) spectra of N2O+ via B2ПiX2Π transitions was obtained over the wavelength range from 230 to 275 nm by preparing N2O+(X2Π(000)) ions via [3+1] resonance enhanced multiphoton ionization of N2O molecules at 360.50 nm. On the basis of the approximation of harmonic oscillation between N and NO or between N2 and O, the Franck-Condon factors for the B2Пi(00n)←X2Π(000) transitions of N2O+ ions were calculated using the potential curves and wavefunctions of the harmonic oscillator. The results of such calculations were compared with the photodissociation spectra of the B2Пi(00n)←X2Π(000) transition so as to estimate the validity of the rotational constants and the bond length of the B2Пi state obtained from previous studies. The photodissociation mechanism of the B2Пi(00n)←X2Π(000) transitions of N2O+ ions and the product branching ratios were also discussed.

Key words: Photodissociation, Nitrous oxide ion, Franck-Condon factor