Technical data

Atomic spectra of two-electron system: He, Hg

Article no: P2510810

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.

Benefits

Spectral lines of various elements can be determined with high precision
Simple setup for high ranking experiments
HV power supply with high safety standards makes experimentation safe

Tasks

Determination of the wavelengths of the most intense spectral lines of He.
Determination of the wavelengths of the most intense spectral lines of Hg.

Learning objectives

Parahelium
Orthohelium
Exchange energy
Spin
Angular momentum
Spinorbit interaction
Singlet and triplet series
Multiplicity
Rydberg series
Selection rules
Forbidden transition
Metastable state
Energy level
Excitation energy

Scope of delivery

Spectrum tube, Hg	06664-01	1
Spectrum tube, helium	06668-01	1
Holders for spectral tubes, 1 pair	06674-01	1
Universal Holder, rotational	08040-02	1
Diffraction grating, 600 lines/mm	08546-00	1
Connecting cord, 30 kV, 1000 mm	07367-00	2
PHYWE High voltage power supply with digital display, 10 kV DC: 0... ± 10 kV, 2 mA	13673-93	1
Insulating support	06020-00	2
Tripod base PHYWE	02002-55	1
Plate holder, opening width 2 - 35 mm	06509-00	1
Barrel base expert	02004-00	1
Stand rods, stainless steel, various sizes	02032-00	1
Right angle clamp expert with fulcrum screw	02054-00	3
Stand tube	02060-00	1
Meter scale, l = 1000 mm	03001-00	1
Cursors, 1 pair	02201-00	1
Measuring tape, l = 2 m	09936-00	1

Recommended accessories

Fibre-optics compact spectrophotometer

35630-00