Prof. Armando Francesco Borghesani

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Academic Career Length

44Years (1983-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 June 1988 in Physical Review A

Journal Article

Electron mobility in neon at high densities

Armando Francesco Borghesani

L. Bruschi

M. Santini

G. Torzo

The electron drift mobility has been measured in a wide range of temperatures and densities in neon gas and saturated vapor. The ‘‘zero-field’’ density-normalized mobility

μ_{0}

N exhibits a strong density dependence, which cannot be accounted for by the existing multiple-scattering theories. The data, however, can be well fitted by assuming a density dependence in the e-Ne scattering cross section.

1 December 1990 in Physical Review A

Journal Article

Electron mobility and localization effects in high-density Ne gas

Armando Francesco Borghesani

M. Santini

We report on the measurements of electron as well as ion mobility in neon gas at low temperature (close to the critical temperature) and up to very high density (N≊180×

10^{20}

{cm}^{- 3}

). We have found evidence of localized electron states at densities larger than (90–100)×

10^{20}

{cm}^{- 3}

. The transition from the region of quasifree states to that of coexisting quasifree and localized states takes place in a density range in fairly good agreement with the predictions of a simple bubble model. The mobility data of the quasifree electron are in disagreement with the actual multiple-scattering theory. The detailed calculation of the mean mobility in the high-density region where localization takes place is still an unsolved problem.

1 December 1992 in Physical Review A

Journal Article

Excess electron mobility in high-density argon gas

Armando Francesco Borghesani

M. Santini

P. Lamp

We report accurate measurements of excess electron mobility in high-density Ar gas at a temperature T≃163 K in the density range (4<N<70)×

10^{20}

{cm}^{- 3}

as a function of the electric-field strength. The positive-density effect shown by the zero-field density-normalized mobility

μ_{0}

N can be explained within the same theoretical framework recently used for neon gas, where

μ_{0}

N shows a negative-density effect. Thus the analysis of our present measurements indicates that there is no need for two separate theories for both negative- and positive-scattering-length gases.

1 October 1990 in Physics Letters A

Journal Article

Electron transmission through the Ar liquid-vapor interface

Armando Francesco Borghesani

G. Carugno

M. Cavenago

E. Conti

29 April 2002 in Physical Review E

Journal Article

High-temperature electron localization in dense He gas

Armando Francesco Borghesani

M. Santini

We report accurate measurements of the mobility of excess electrons in high-density helium gas in extended ranges of temperature

[(26 <~ T <~ 77) K]

and density

[(0.05 <~ N <~ 10.0) atoms {nm}^{- 3}] .

The aim is the investigation of the combined effect of temperature and density on the formation and dynamics of localized electron states. The main result of the experiment is that the formation of localized states essentially depends on the relative balance of fluid dilation energy, repulsive electron-atom interaction energy, and thermal energy. As a consequence, the onset of localization depends on the medium disorder through gas temperature and density. The transition from delocalized to localized states shifts to larger densities as temperature is increased. This behavior can be understood in terms of a simple model of electron self-trapping in a spherically symmetric square well.

1 September 1990 in Measurement Science and Technology

Journal Article

Electron swarm experiments in fluids-signal waveform analysis

Armando Francesco Borghesani

M Santini

The authors report on several methods developed in order to extract information on electron attachment frequency and on electronic and ionic mobility from the numerical analysis of the waveforms recorded during electron swarm experiments. These numerical methods, implemented on a personal computer, enable one to analyse the large number of data acquisitions made during a typical experimental run in a reasonably small time.

About Me

Armando Francesco Borghesani, born in Verona (Italy) on March 22, 1956. Laurea in Fisica on March 29, 1979, with grade 110/110 issued by the University of Padua. Activity: May 1980–November 1981: Junior researcher at ST Microelectronics, Milan, Italy. November 1981–July 1983 researcher at EniRicerche (ENI Group) (Milan, Italy). September 1983–October 1992: Assistant Professor in Physics of Matter at the University of Padua. Since 1992: Associate professor of Experimental Physics, Department of Physics and Astronomy “Galileo Galilei”, Università degli Studi, Padua, Italy. Scientific interests: experimental low-temperature physics, charge transport in dielectric gases and liquids, excimer infrared spectroscopy in gases at high density, microwave generation by nonlinear crystals excited by laser pulses, fundamental studies in thermal emission by hot bodies. Hobbies: playing classic music on piano and church organ, open waters swimming, motorbike touring.

Prof. Armando Francesco Borghesani

Prof. Armando Francesco Borghesani

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About Me