Doublet→quartet and doublet→doublet electronic transitions in NO2 by electron impact

Excitation of electronic states in tetrahydrofuran by electron impact.

We report on differential and integral cross section measurements for the electron impact excitation of the three lowest lying Rydberg bands of electronic states in tetrahydrofuran. The energy range of the present experiments was 15-50 eV with the angular range of the differential cross section measurements being 15°-90°. The important effects of the long-range target dipole moment and the targ...

Electronic excitation of H2O by low-energy electron impact.

K β satellite and forbidden transitions in elements with 12 Z 30 induced by electron impact

Silvina P. Limandri,1,2 Alejo C. Carreras,1,3,* Rita D. Bonetto,1,4 and Jorge C. Trincavelli1,2 1Consejo Nacional de Investigaciones Cientı́ficas y Técnicas, C1033AAJ Buenos Aires, Argentina 2Facultad de Matemática, Astronomı́a y Fı́sica, UNC, 5000 Córdoba, Argentina 3Instituto de Investigaciones en Tecnologı́a Quı́mica, UNSL, CC290–5700 San Luis, Argentina 4Centro de Investigación y Desarrollo en C...

Electronic and vibrational excitation in gas phase thymine and 5-bromouracil by electron impact

In thymine (T) and 5-bromouracil (BrU) the excitation of the lowest electronic states and vibrational excitation using EEL spectroscopy (0–100 eV) with angular analysis is reported. In the two molecules the singlet electronic states have been found blue-shifted by about 0.3 eV compared to the UV–Vis absorption results. Evidence has been found of triplet states at 3.6 eV for T and 3.35 eV for Br...

Probing electronic transitions in individual carbon nanotubes by Rayleigh scattering.

Rayleigh scattering spectra were obtained from individual single-walled carbon nanotubes with the use of a laser-generated visible and near-infrared supercontinuum. This diagnostic method is noninvasive and general for nanoscale objects. The approach permits clear identification of excited states in arbitrary metallic and semiconducting nanotubes. We analyzed spectral lineshapes in relation to ...