N2O+经由B2Пi←X2П跃迁的光解离机理研究

doi:10.3866/PKU.WHXB201405202

Abstract

Abstract:

Photofragment (NO⁺ and N₂⁺) excitation (PHOFEX) spectra of N₂O⁺ via B²П_i←X²Π 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 B²П_i(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 B²П_i(00n)←X²Π(000) transition so as to estimate the validity of the rotational constants and the bond length of the B²П_i state obtained from previous studies. The photodissociation mechanism of the B²П_i(00n)←X²Π(000) transitions of N₂O⁺ ions and the product branching ratios were also discussed.

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

WU Dan, ZHANG Li-Min, ZHOU Dan-Na. Study on the Photodissociation Mechanism of N₂O⁺ via B²П_i←X²П Transitions[J]. Acta Phys. -Chim. Sin. 2014, 30(8), 1575-1580. doi: 10.3866/PKU.WHXB201405202

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Study on the Photodissociation Mechanism of N₂O⁺ via B²П_i←X²П Transitions

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Study on the Photodissociation Mechanism of N₂O⁺ via B²П_i←X²П Transitions