Modern Physics

Fine structure: one and two electron spectra

Principle

The well-known spectral lines of He are used for calibrating the diffraction spectrometer. The wave-lengths of the spectral lines of Na, Hg, Cd and Zn are determined using the spectrometer.

Tasks

1. Calibration of the spectro ...

Balmer series/ determination of Rydberg's constant

Principle

The spectral lines of hydrogen and mercury are examined by means of a diffraction grating. The known spectral lines of Hg are used to determine the grating constant. The wave lengths of the visible lines of the Balmer series of H are measured.

Tasks

Atomic spectra of two-electron system: He, Hg

Principle

The spectral lines of He and Hg are examined by means of a diffraction grating. The wavelengths of the lines are determined from the geometrical arrangement and the diffraction grating constants.

Tasks

1. Determination of the ...

Zeeman effect with an electromagnet

Principle

The "Zeeman effect" is the splitting upof the spectral lines of atoms within amagnetic field. The simplest is thesplitting up of one spectral line intothree components called the "normal Zeeman effect". In this experiment thenormal Zeeman effect as we ...

Zeeman effect with a CCD camera including the measurement software

Principle

The "Zeeman effect" is the splitting up of the spectral lines of atoms within a magnetic field. The simplest is the splitting up of one spectral line into three components called the "normal Zeeman effect". In this experiment the normal Zeeman effect ...

Zeeman effect with a variable magnetic system

Principle

The "Zeeman effect" is the splitting up of the spectral lines of atoms within a magnetic field. The simplest is the splitting up of one spectral line into three components called the "normal Zeeman effect". In this experiment the normal Zeeman effect ...

Zeeman effect with a variable magnetic system and a CCD camera including the measurement software

Principle

The "Zeeman effect" is the splitting up of the spectral lines of atoms within a magnetic field. The simplest is the splitting up of one spectral line into three components called the "normal Zeeman effect". In this experiment the normal Zeeman effect as well as the ...

Stern-Gerlach experiment

Principle

A beam of potassium atoms generated in a hot furnace travels along a specific path in a magnetic two-wire field. Because of the magnetic moment of the potassium atoms, the non-homogeneity of the field applies a force at right angles to the direction of their motion. ...

Stern-Gerlach experiment with a stepper motor and interface

Principle

A beam of potassium atoms generated in a hot furnace travels along a specific path in a magnetic two-wire field. Because of the magnetic moment of the potassium atoms, the nonhomogeneity of the field appliesa force at right angles to the directionof their motion. Th ...

Electron spin resonance

Principle

With electron spin resonance (ESR) spectroscopy compounds having unpaired electrons can be studied. The physical background of ESR is similar to that of nuclear magnetic resonance (NMR), but with this technique electron spins are excited instead of sp ...

Electron spin resonance model experiment

Principle
Model experiment for electron spin resonance for clear demonstration of interaction between the magnetic moment of the electron spin with a superimposed direct or alternating magnetic field.

Related topics

• Magn ...

Electron diffraction

Principle

Fast electrons are diffracted from a polycrystalline layer of graphite: interference rings appear on a fluorescent screen. The interplanar spacing in graphite is determined from the diameter of the rings and the accelerating voltage.

Tasks

...

Half-life and radioactive equilibrium

Principle

The half-life of a Ba-137 m daughter substance eluted (washed) out of a Ca-137 isotope generator is measured directly and is also determined from the increase in activity after elution.

Tasks

1. To record the counting rate as ...

Half-life and radioactive equilibrium with Cobra3

Principle

The half-life of a Ba-137 m daughter substance eluted (washed) out of a Ca-137 isotope generator is measured directly and is also determined from the increase in activity after elution.

Tasks

1. To record the counting rate as ...

Poisson's and Gaussian distribution of radioactive decay with Cobra3 (Influence of the dead time of the counter tube

Principle

1) The aim of this experiment is to show that the number of pulses counted during identical time intervals by a counter tube which bears a fixed distance to along-lived radiation emitter correspond to a Poisson´s distribution. A special characteristic ...