Multiphoton excitation spectroscopy of the B 1Σ+ and C 1Σ+ Rydberg states of CO

Abstract

Articles you may be interested inResonance enhanced multiphoton ionization spectroscopy of the NF molecule: 1Σ+ and 1Δ 3p Rydberg states A (3+1) resonance enhanced multiphoton ionization study of the C 1Σ+ and E 1Π states of CO: Polarization dependence used to probe electronic excitation routes and electronic character J. Chem. Phys. 99, 5061 (1993); 10.1063/1.466006Rotational analysis of v=1 level of n=810 Rydberg states of CO by triple resonant multiphoton spectroscopy A study of some Rydberg states of CO2 by (3+1) multiphoton ionization spectroscopy Two-photon absorption spectra ofthe CO 3s B 11;+ +--X 11;+ (v',v") = (0,0), (1,1), (2,2),(1,0), and 3pu C 11;+ _ -X 11;+ (0,0) transitions have been observed in a room temperature cell and in an atmospheric pressure hydrocarbon flame using fluorescence (B 11;+ -A In) and ionization detection. The ratio of the transition strengths for theB 11;+ --X 11;+ (0,0) Qbranch head is found to exceed 200:1 for excitation with two identical linearly polarized photons compared with two circularly polarized photons. Weak 0 and Sbranches are observed for the first time for the B 11;+ --X 11;+ (0,0) transition and show the expected 2:3 polarization ratio. These measured polarization ratios are well described by two-photon absorption theory for 1; --1; transitions. In contrast, an earlier study by another group obtained a value of 0.7:1 for the Q-branch polarization ratio which did not fit the predictions of two-photon absorption theory.

A velocity map ion-imaging study on ketene photodissociation at 208 and 213nm: Rotational dependence of product angular anisotropy

“…One beam photolyzed the parent molecule and the other beam probed the photofragment CO, produced in the photodissociation. The CO + ions produced by B 1 ⌺ + ← X 1 ⌺ + ͑2+1͒ resonance enhanced multiphoton ionization 25 ͑REMPI͒ were accelerated and projected onto a dual microchannel plate ͑MCP͒ backed by a phosphor screen. A high voltage pulse 200 ns in duration was applied to the MCP to time gate the CO + ions.…”

Atomic and molecular photostimulated desorption from complex ionic crystals

“…For the detection of CO, we have chosen a sensitive method utilized by numerous researchers; (2+1) resonance enhanced multiphoton ionization (REMPI). [23][24][25] The (2+1) process involves two-photon excitation of the B 1 ∑←←X 1 ∑ transition followed by one photon ionization from the B-state to the ion ground electronic state. This is done with a second, tunable probe laser.…”

Photodissociation dynamics of dicyclopropyl ketone at 193 nm: Isomerization of the cyclopropyl ligand

“…28 Photons for both REMPI steps are obtained by frequency doubling the output of a Nd:YAGpumped dye laser operating at 460 nm. The REMPI light ͑ϳ100 J/pulse͒ is focused by a 46-cm focal length lens.…”