Physique du Molécule et Corps solide

 
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Effet Hall dans du germanium dopé n et p (teslametre)

Principle

The resistivity and Hall voltage of 2  rectangular germanium samples ( n- and p-) are measured as a function of temperature and magnetic field.
The band spacing, the specific conductivity, the type of charge carrier and the mobility of the charge carriers are ...

 
Détails

Numéro d´article: P2530102

Effet Hall dans du germanium dopé n et p (PC)

Tasks
  1. The Hall voltage is measured at room temperature and constant magnetic field as a function of the control current and plotted on a graph (measurement without compensation for defect voltage).
  2. The voltage across the sample is measured at room temperature and constant control current ...
 
Détails

Numéro d´article: P2530116

Bande interdite du Germanium

 
Détails

Numéro d´article: P2530402

Résolution atomique de la surface du graphite avec le microscope à effet tunnel (STM)

Principle

Approaching a very sharp metal tip to an electrically conductive sample by applying a electrical field leads to a current between tip and sample without any mechanical contact. This so-called tunneling current is used to investigate the electronic topography on the sub nanometer ...

 
Détails

Numéro d´article: P2532000

Méthode de base de l'imagerie de micro et nanostructuresavec le microscope à force atomique (AFM)



Principle

Approaching a sharp silicon tip mounted on a cantilever to a sample surface leads to an atomic scale interaction. The result is a bend of the cantilever which is detected by a laser. In static mode the resulting deflection is used to investigate the topography of the ...

 
Détails

Numéro d´article: P2538000

Caractéristique du rayonnement X du cuivre

Principle

Spectra of X-rays from a copper anode are analyzed using different monocrystals and the results plotted graphically. The energies of the characteristic lines are then determined from the positions of the glancing angles for the various ...

 
Détails

Numéro d´article: P2540101

Caractéristique du rayonnement X du molybdène

Principle

Spectra of X-rays from a molybdenum anode are to be analyzed by means of different monocrystals and the results plotted graphically. The energies of the characteristic lines are then to be determined from the positions of the glancing angles for the various orders of ...

 
Détails

Numéro d´article: P2540201

Caractéristique du rayonnement X du fer

Principle

Spectra of X-rays from an iron anode are to be analyzed by means of different monocrystals and the results plotted graphically. The energies of the characteristic lines are then to be determined from the positions of the glancing angles for the various orders of ...

 
Détails

Numéro d´article: P2540301

Détermination de l'intensité d'un rayonnement x caractéristique en fonction du courant et de la tension anodique

Principle

The polychromatic X-radiation from a copper anode is analyzed using a LiF monocrystal according to Bragg. Varying the anode current and anode voltage influences the intensity of the characteristic K a and K b radiation.

Tasks

  1. Record the intensity spectrum of ...
 
Détails

Numéro d´article: P2540401

Monochromatisation des rayons X du molybdène

Principle

The X-rays that are generated by an X-ray tube are polychromatic. Numerous experiments (e.g. Debye-Scherrer experiments concerning crystal structures), however, require monochromatic X-radiation, which can be generated by filtering the X-rays with monocrystals or with the aid of ...

 
Détails

Numéro d´article: P2540501

Monochromatisation des rayons X du cuivre



Principle

The X-rays that are generated by an X-ray tube are polychromatic. Numerous experiments (e.g. Debye-Scherrer experiments concerning crystal structures), however, require monochromatic X-radiation, which can be generated by filtering the X-rays with monocrystals or ...

 
Détails

Numéro d´article: P2540601

Séparation du doublet K-Alpha du fer - structure fine

Principle

The polychromatic iron X-ray spectrum is to analyzed by means of a monocrystal. The energy of the characteristic lines is to be determined from the positions of the glancing angles for various orders of diffraction. The separation of the Ka doublet in higher order diffraction is ...

 
Détails

Numéro d´article: P2540801

Loi de déplacement de Duane-Hunt et détermination de la constante de Planck

Principle

X-ray spectra are recorded as a function of the anode voltage. The short wavelength limit of the bremsspectrum is used to determine the agreement with the Duane-Hunt displacement law, and to determine Planck's "quantum of action".

Tasks

  1. Record the intensity of the X-rays ...
 
Détails

Numéro d´article: P2540901

Absorption des rayons X

Principe de l'expérience

L'énergie d'un Rayonnement-X polychromatique sera analysée à l'aide d'un monocristal analyseur. Le rayonnement monochromatique obtenu servira de source principale de rayonnement pour l'examen du comportement d'absorption de différents ...

 
Détails

Numéro d´article: P2541101

Absorption d'arête K et L / Loi de Moseley et constante de Rydberg

Principle

Samples of various elements of different atomic numbers are irradiated with X-rays of a known spectral distribution. The energy of the transmitted intensities is analyzed using a monocrystal analyzer. Subsequently, the Rydberg constant and the screening constants are calculated ...

 
Détails

Numéro d´article: P2541201

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