Citation: SUN Zhong-Fa, GAO Zhi, WU Xiang-Kun, TANG Guo-Qiang, ZHOU Xiao-Guo, LIU Shi-Lin. Excitation Spectra and Photodissociation Dynamics of the B²П State of the N₂O⁺ Ion[J]. Acta Physico-Chimica Sinica, ;2015, 31(5): 829-835. doi: 10.3866/PKU.WHXB201503041 shu

Excitation Spectra and Photodissociation Dynamics of the B²П State of the N₂O⁺ Ion

1.
Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China

Received Date: 5 January 2015
Available Online: 4 March 2015
Fund Project: 国家自然科学基金(21373194) (21373194)国家重点基础研究发展规划项目(973) (2013CB834602)资助 (973) (2013CB834602)

N₂O⁺ ions in the X²П(0,0,0) ground state were prepared by (3+1) resonance-enhanced multiphoton ionization (REMPI) of jet-cooled N₂O molecules at 360.55 nm, and then photoexcited to various vibrational levels in the B²П state over a wavelength range of 243-278 nm, followed by dissociation. The photofragment excitation (PHOFEX) spectrum was recorded by measuring the intensity of NO⁺ ion fragments vs excitation wavelength. The rotational constants and spin-orbit coupling were obtained by fitting the rotational structures of the vibrational bands. Thus, the contributions of highly excited vibronic levels of A²Σ⁺ states were distinguished from the other bands, and the original band of B²П state was verified. The series of vibrational bands in the PHOFEX spectrum were assigned to the transition of B²П(v₁,v₂,v₃) ←X²П. The average released kinetic energy of dissociation from the various B²П(v₁,v₂,v₃) ionic states was obtained by fitting the spreading contour of the NO⁺ ion peak in time-of-flight mass spectra. Dissociation mechanisms of N₂O⁺(B²П) were proposed with the aid of the theoretical potential energy surfaces of N₂O⁺ ions.
- N₂O⁺ ion,
- Resonance enhanced multiphoton ionization,
- Vibrational spectroscopy,
- Time-of-flight mass spectrum,
- Photodissociation
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Excitation Spectra and Photodissociation Dynamics of the B2П State of the N2O+ Ion

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通讯作者: 陈斌, bchen63@163.com

Excitation Spectra and Photodissociation Dynamics of the B²П State of the N₂O⁺ Ion