[en] Time-resolved fluorescence spectrum of Quinacrine Mustard in acetate buffer solution (pH 4.6) under excitation of subnanosecond laser pulses os reported. The decay curve has been found to consist of three exponential components, whose amplitudes depend on both excitation and observation wavelengths. This behaviour has been attributed to the formation of three protonated species of the molecule in the excited state. (orig.)

[en] The visible fluorescence of UF₆ excited at 374 nm has been studied in the temperature range 273-313 K. The quenching rate has been found to change with temperature according to the Arrhenius equation. Values of the unimolecular decay times are also reported. (Auth.)

[en] Measurements of weak fluorescence of UF₆ in the gas phase are reported. Fluorescence with a quantum yield of approximately 5 x 10^-5 can be detected between 400 and 460 nm. The excitation spectrum indicates that the fluorescence disappears for excitation wavelength shorter than 360 nm. The decay time depends strongly on UF₆ partial pressure and temperature. (Auth.)

[en] Mixtures of UF₆ and H₂ in different ratios have been irradiated at 360 and 400 nm by means of a filtered mercury lamp. A significant pressure drop has been observed at both excitation wavelengths due to the dissociation of UF₆ into UF₅ + F. A very high dissociation quantum yield has been found. (orig.)

[en] Second-harmonic cross-correlation operates a selection in time-phase among the randomly dephased contributions to an optical field that propagated through a scattering medium. It can thus be used to selectively detect the weak contribution remaining coherent with the incident field.

[en] The calibration and monitoring system constructed for the HARP experiment scintillator-based time of flight system is described. It is based on a Nd-Yag laser with passive Q-switch and active/passive mode-locking, with a custom made laser light injection system based on a bundle of IR monomode optical fibers. A novel ultrafast InGaAs MSM photodiode, with 30 ps risetime, has been used for the laser pulse timing. The first results from the 2001-2002 data taking are presented, showing that drifts in timing down to about 70 ps can be traced

[en] We propose a non-collinear experimental scheme for the joint generation of two amplitude-squeezed beams at the frequencies ω₁ and ω₂, fundamental and second harmonics of a Nd:YAG laser pulse. The scheme consists of two successive steps, both involving second-order non-linear interactions in β-BaB₂O₄ non-linear crystals. One of the output beams show subPoissonian photon statistics, and this allows to use photodetection instead of homodyne detection for diagnostics. (orig.)

[en] We demonstrate the effect of multiple-photon subtraction on the generation of conditional states in the pulsed regime. Our experimental scheme relies on a beam splitter (BS) and a pair of linear photodetectors that are able to resolve up to tens of photons. We use a single-mode thermal field at the input port of the BS to test the reliability of our scheme, and we show good agreement with the theory by fully characterizing the conditional outgoing states in terms of photon-number statistics and non-Gaussianity.