(2+1) Resonance-enhanced multiphoton ionization (REMPI) and (2+1′) mass-analyzed threshold ionization (MATI) spectroscopy of H2O

Threshold ionization spectroscopy of H2O, HDO and D2O and low-lying vibrational levels of HDO+and D2O+

“…The p character of the of b 1 valence orbital out of which the electron is ejected tends to favour the emission of even-(s and d) photoelectron partial waves, a tendency we refer to as the even-propensity below. However, previous work on the photoionization of H 2 O has indicated that the photoelectron can also be ejected as odd-partial waves as a result of rotational channel interactions mediated by the dipole moment of the ion core [7,8,11,13,27,33] and the deviation of the b 1 valence orbital from a pure = 1 orbital.…”

“…Studies of H 2 O, HDO and D 2 O by vacuum-ultraviolet photoelectron and photoionization spectroscopy provide information on their interaction with short-wavelength radiation, on their photoionization dynamics and on the energy-level structure and dynamics of the cations [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. The valence-shell photoionization of water, either in a single-photon process from theX 1 A 1 ground state or in multiphoton processes through electronically excited states, has provided access to a wide range of rovibrational levels of theX + 2 B 1 andà + 2 A 1 states of the cation, which are degenerate in linear (D ∞h ) configurations and subject to the Renner-Teller effect [17][18][19].…”

Threshold photoionization in time‐of‐flight mass spectrometry

“…Krause & Neusser (1992) Cl isotopomers of p-chloroaniline, and o-fluoroaniline (Lin & Tzeng, 2000a). Recently, Dickinson, Mackenzie, & Softley (2000) applied MATI spectroscopy to water. In the same group, MATI-like techniques were applied by Merkt et al to other small FIGURE 8.…”

Dissociation and predissociation in the ns 1B1 and np1A2 series of H2O

“…Section profile. The tentative assignment of a band attributable to this state in the 2+1 REMPI spectrum [23] is given. Finally section 6 summarizes the main conclusions, and gives pointers for future research.…”

“…Golden rule linewidth estimates in Section 4 are shown to be in good agreement with the full MQDT theory, despite significant systematic errors in the resonance energy levels. Application of this perturbation approach to the npb 2 2+1 REMPI spectrum [23] is given. Finally section 6 summarizes the main conclusions, and gives pointers for future research.…”