KA6040/41 Frank Hertz Hg Tube with Oven

Browse more in Atomic category

For demonstrating that free electrons colliding with mercury atoms emit energy in quantized packets and for determining the excitation energy of the (61S0 � 63P1) resonance line in mercury at 4.9 eV.

Franck-Hertz Tube with Hg For demonstrating that free electrons colliding with mercury atoms emit energy in quantized packets and for determining the excitation energy of the (61S0 � 63P1) resonance line in mercury at 4.9 eV. Highly evacuated cathode ray tube with mercury gas filling and plane-parallel electrodes in order to avoid distortion of field lines. Electrodes include an indirectly heated, oxide cathode, perforated to produce a homogenous electric field plus an anode grid and collector (counter) electrode. In order to raise the probability of collisions between electrons and mercury atoms to a sufficient amount, the tube needs to be heated using a special heater. Heater: 4 to 12 V AC/DC Grid voltage: 0 to 70 V Countervoltage: 1.5 V approx. Operating temperature: 200� C approx. Dimensions of tube: 130 mm x 26 mm � approx. Heater For adjusting the vapor pressure in the mercury-filled Franck-Hertz tube. Spray painted metal housing with tube symbols printed on the front panel that are visible from a distance, ceramically insulated connection sockets, viewing windows, opening with spring clamp for thermometer in the lid, insulated carrying handle and built-in thermostat for adjusting temperature. Heater: 115 V AC, 400 W Temperature range: 160� to 240� C Constant temperature precision: � 5� C approx. Dimensions: 240x160x150 mm Weight: 3.5 kg