Rotational-resolved pulsed field ionization photoelectron study of NO{sup +}(a {sup 3}{Sigma}{sup +},v{sup +}=0{endash}16) in the energy range of 15.6{endash}18.2 eV
- Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 4720 (United States)
- Ames Laboratory, USDOE (United States)
We have obtained rotationally resolved pulsed field ionization photoelectron (PFI-PE) spectra of NO in the energy range of 15.6{endash}18.2 eV, covering ionization transitions of NO{sup +}(a&hthinsp;{sup 3}{Sigma}{sup +},v{sup +}=0{endash}16,J{sup +}){l_arrow}NO(X&hthinsp;{sup 2}{Pi}{sub 3/2,1/2},v{sup {double_prime}}=0,J{sup {double_prime}}). The PFI-PE bands for NO{sup +}(a&hthinsp;{sup 3}{Sigma}{sup +},v{sup +}=1{endash}5,7{endash}10,12{endash}14,16) obtained in this experiment represent the first rotationally resolved spectroscopic data for these states. The simulation of these PFI-PE bands provides accurate molecular constants for NO{sup +}(a&hthinsp;{sup 3}{Sigma}{sup +},v{sup +}=0{endash}5,7{endash}10,12{endash}14,16), including ionization energies, vibrational constants ({omega}{sub e}{sup +}=1295.2{plus_minus}0.1&hthinsp;cm{sup {minus}1}, {omega}{sub e}{sup +}{chi}{sub e}{sup +}=15.198{plus_minus}0.002&hthinsp;cm{sup {minus}1}), and rotational constants (B{sub e}{sup +}=1.3501{plus_minus}0.0070&hthinsp;cm{sup {minus}1}, {alpha}{sub e}{sup +}=0.0206{plus_minus}0.0001&hthinsp;cm{sup {minus}1}). As observed in the PFI-PE study of NO{sup +}(X&hthinsp;{sup 1}{Sigma}{sup +}), this experiment reveals a generally increasing trend for the maximum {Delta}J value and intensities of higher {Delta}J branches as v{sup +} (or bond distance) for NO{sup +}(a&hthinsp;{sup 3}{Sigma}{sup +}) is increased. This observation can be taken as strong support of the electron-molecular-ion-core scattering model for angular momentum and energy exchanges in the threshold photoionization of NO. {copyright} {ital 1999 American Institute of Physics.}
- OSTI ID:
- 365876
- Journal Information:
- Journal of Chemical Physics, Vol. 111, Issue 5; Other Information: PBD: Aug 1999
- Country of Publication:
- United States
- Language:
- English
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