Energy absorption by N2O in the 4 to 14 eV region

Abstract

Apparent oscillator-strength values for transitions in the 4 to 14 eV region in nitrous oxide have been derived from electron energy-loss measurements. Detailed comparison with photoabsorption measurements in the ultraviolet region indicates a weak transition below the 1Δ←? 1Σ+ transition at 6.8 eV not observed optically. This analysis also provides oscillator-strength values in the region between 11.5 and 12.4 eV, where no quantitative photoabsorption data are available.

On the ultraviolet absorption of nitrous oxide and its van der Waals complexes

“…While calculations were performed for singlet and for triplet states, only singlet states are considered here because they describe the experimentally observed absorption spectrum very well. The overall agreement between our TDDFT results, the theoretical results of Hopper [31] and the experimental values [24] is good, with the M052X functional yielding the least precise results for the monomer excited states, as expected. Generally, the TDDFT calculations tend to result in slightly too large values for vertical excitation energies.…”

“…1 we present an overview over the experimental one-photon absorption spectrum of nitrous oxide taken from Ref. [24], together with theoretical transition energies from our own and from Hopper's [31] calculations.…”

“…The N 2 O absorption spectrum has been studied by several groups [21][22][23][24][25][26][27][28][29]. It consists of a structured continuum (B 1 D) from 160 to 220 nm, diffuse bands from 140 to 160 nm (C 1 II), a dissociative continuum from 120 to 140 nm (D 1 R + ), and a region of many Rydberg states from 100 to 120 nm.…”

“…It consists of a structured continuum (B 1 D) from 160 to 220 nm, diffuse bands from 140 to 160 nm (C 1 II), a dissociative continuum from 120 to 140 nm (D 1 R + ), and a region of many Rydberg states from 100 to 120 nm. Whereas several theoretical calculations of the absorption spectrum have been performed for low energy excitation [30 and references therein], calculated spectra for the Rydberg region below 120 nm remain scarce [24,31].…”

Resonance-enhanced multiphoton ionization photoelectron spectroscopy of Rydberg states of N2O below the X 2Π ionization limit

“…7 Quite a number of techniques, including photoabsorption, 6,13,14 electron impact 15,16 and resonanceenhanced multiphoton ionization in combination with massresolved ion detection ͑REMPI͒ 17,18 have been used for spectroscopic investigation of the excited states of N 2 O below the X 2 ⌸ limit. Studies on superexcited states include photoionization 9 and measurement of fluorescence from excited neutral fragments as a function of the excitation wavelength.…”