16 Result(s)

Article

Laser and electron beams physical analyses applied to the comparison between two silver tetradrachm greek coins

Physical analyses by laser ablation coupled to mass quadrupole spectrometry (LAMQS), energy dispersive X-ray fluorescence (EDX) induced by electron beam, scanning electron microscopy (SEM) and surface profilom...

L. Torrisi, G. Mondio, A. M. Mezzasalma, D. Margarone… in The European Physical Journal D (2009)

Article

Al₂O₃ plasma production during pulsed laser deposition

A Nd:YAG laser operating in second harmonic (532 nm), 3 ns pulse duration, 150 mJ pulse energy, and 10 Hz repetition rate, is employed to irradiate Al₂O₃ target placed in high vacuum. The produced plasma is inves...

F. Caridi, L. Torrisi, A. M. Mezzasalma, G. Mondio… in The European Physical Journal D (2009)

Article

The dielectric constant of TCNQ single crystals as deduced by reflection electron energy loss spectroscopy

The dielectric constant of tetracyanoquinodimethane (TCNQ) single crystals has been obtained by reflection electron energy loss spectroscopy (REELS) over the 0–60 eV energy range, using primary electron energi...

G. Mondio, F. Neri, G. Curró, S. Patané, G. Compagnini in Journal of Materials Research (1993)

Article

Comments on the paper «Fluorescence decay of indole in water» by N. Periasamy and G. C. Joshi

Examples of multiexponential decay of indole are reported. Problems connected with the minimization procedure are also outlined.

U. Giorgianni, A. M. Mezzasalma, G. Mondio, G. Saitta in Il Nuovo Cimento D (1990)

Article

Rheo-Optical Properties of Ion Irradiated Polystyrene Films

Rheological and optical properties of polystyrene are modified by 200 keV He irradiation because of new molecular bonds induced by ion energy deposition. Total amount of bonds, as calculated by optical measure...

L. Calcagno, G. Compagnini, G. Foti, A. Mezzasalma… in MRS Online Proceedings Library (1990)

Article

Experimental evidence of a short-lived component in the fluorescent decay of the indole

In this paper we report measurements of fluorescence phase-shift and modulation data of pure indole over a wide range of modulation frequencies. Our results firstly show two decay times in several solutions, i...

U. Giorgianni, A. M. Mezzasalma, G. Mondio, G. Saitta in Il Nuovo Cimento D (1989)

Article

Optical properties, structure and electronic energy levels of the organicN-methyl, 2,3 diphenyl, 5-methyl indole compound

The absorption properties of the new synthetized organicN-methyl, 2,3 diphenyl, 5-methyl indole compound have been studied. An X-ray diffraction analysis has been carried out in order to obtain the structural pro...

R. Girlanda, G. Martino, A. M. Mezzasalma, G. Mondio, G. Saitta… in Il Nuovo Cimento D (1989)

Article

Fluorescence spectra and electronic-energy levels of the semiconductor 7, 7′, 8, 8′ tetracyanoquinodimethane (TCNQ)

The luminescence of solutions of TCNQ together with their absorption spectra have been measured and compared with the optical properties of powders, as deduced by diffuse reflectance spectroscopy. The experime...

R. Girlanda, G. Martino, A. M. Mezzasalma, G. Mondio, G. Saitta in Il Nuovo Cimento D (1986)

Article

Optical properties of the semiconductor 7, 7′, 8, 8′, tetracyanoquinodimethane (TCNQ)

The reflectivity and absorption spectra of 7, 7′, 8, 8′ tetracyanoquinodimethane thin films, in the visible and near-ultraviolet range, have been measured. Samples have been grown and characterized by means of...

R. Girlanda, G. Martino, A. M. Mezzasalma, G. Mondio, P. Perillo… in Il Nuovo Cimento D (1986)

Article

A study of theXVV auger line shape of Fe−Ni alloys

A comparison is performed between theoretical and experimental shapes of theXVV (X=M _2,3 andL ₃) Auger spectra of ferromagnetic Fe _{x ...}

G. Cubiotti, G. Mondio, F. Sacchetti, K. Wandelt in Il Nuovo Cimento D (1986)

Chapter

Optical Properties in the Low Energy Range

In this chapter recent developments, in the years since 1975, concerning the study of low energy optical properties of layer crystal structures are reported.

V. Grasso… in Electronic Structure and Electronic Transitions in Layered Materials (1986)

Article

Coulomb correlations and shapes of XPS spectra of ferromagnetic Fe−Ni alloys

The effect of the Coulomb correlations in partially filled valenced-bands has been considered by computing the renormalized valence band spectra for alloys having Fe concentrations of 20% and 50%, according to a ...

G. Cubiotti, G. Mondio, F. Sacchetti, M. Corchia, P. Delogu… in Il Nuovo Cimento D (1985)

Article

Disorder and optical characterization of evaporation deposited a-Si: H films

We have found, from optical transmission and photoconductivity measurements, that the width of the Urbach’s tail and the optical-band gap value depend on the amount of disorder present in the network of a-Si: H f...

V. Grasso, A. M. Mezzasalma, G. Mondio, F. Neri in Il Nuovo Cimento D (1982)

Article

A new self-consistent smoothing program

A new smoothing computer program is presented which may be of great interest for a large number of scientific fields. Due to its versality it was tested on Mössbauer and astrophysical data but it can always be...

U. Giorgianni, G. Mondio, G. Saitta, G. Vermiglio in CALCOLO (1976)

Article

Complex band edge at the energy gap of GaTe

U. Giorgianni, G. Mondio, G. Saitta, G. Vermiglio in Lettere al Nuovo Cimento (1971-1985) (1975)

Article

Wavelength-modulated reflectivity of bismuth telluride

Modulated-reflectivity measurements on Bi₂Te₃ at room temperature with a double-beam wavelength modulation method are reported. The data were subjected to a Kramers-Kronig analysis in order to determine the corre...

V. Grasso, G. Mondio, G. Saitta in Il Nuovo Cimento B (1971-1996) (1975)