Молекулярная физика и физика твердого тела

 
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Hall effect in n- and p-germanium (Teslameter)

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 ...

 
Детали

Продукт No: P2530102

Hall effect in n- and p-germanium (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 ...
 
Детали

Продукт No: P2530116

Band gap of germanium

 
Детали

Продукт No: P2530402

Atomic Resolution of the graphite surface by STM (Scanning Tunneling Microscope)

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 ...

 
Детали

Продукт No: P2532000

Basic methods in imaging of micro and nanostructures with AFM (Atomic Force Microscopy)



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 ...

 
Детали

Продукт No: P2538000

Characteristic X-rays of copper

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 ...

 
Детали

Продукт No: P2540101

Characteristic X-rays of molybdenum

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 ...

 
Детали

Продукт No: P2540201

Characteristic X-rays of iron

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 ...

 
Детали

Продукт No: P2540301

The intensity of characteristic X-rays as a function of the anode current and anode voltage

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 ...
 
Детали

Продукт No: P2540401

Monochromatisation of molybdenum X-rays

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 ...

 
Детали

Продукт No: P2540501

Monochromatisation of copper X-rays



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 ...

 
Детали

Продукт No: P2540601

K alpha doublet splitting of iron X-rays / fine structure

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 ...

 
Детали

Продукт No: P2540801

Duane-Hunt displacement law and Planck's "quantum of action"

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 ...
 
Детали

Продукт No: P2540901

Absorption of X-rays

Principle

The polychromatic X-radiation that is emitted by an X-ray tube is filtered in terms of its energy with the aid of a monocrystal. The resulting monochromatic radiation is used as the primary radiation source for examining the absorption behaviour of various metal foils of ...

 
Детали

Продукт No: P2541101

K and L absorption edges of X-rays / Moseley's law and the

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 ...

 
Детали

Продукт No: P2541201

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