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Complete Franck–Hertz Experiment in Neon
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Performs Experiment Without Heating the Tube in an OvenYou don’t have to worry about maintaining temperatures when you use our Franck-Hertz Experiment in Neon. The unit is easy to set up and control, and its uncluttered design and high-quality construction make it extremely reliable. It’s designed to operate at room temperature—no oven is needed and no juggling with “critical” temperatures is required. And with our neon-filled tube, you can see and investigate visible excitation zones, something that’s not possible with a mercury tube.In this experiment, you’ll be able to demonstrate the Franck-Hertz effect in neon and to calculate the excitation energies of the gas. The characteristic discharge glow of the neon shows visible excitation zones, corresponding to 1, 2, 3 or more excitation collisions of electrons with neon atoms. You also can investigate these zones with a spectroscope. (This visible evidence of the Franck–Hertz effect occurs in neon but not in mercury, where the excitation zones are in the UV region and are therefore invisible.)The apparatus consists of a neon-filled Franck-Hertz tube in a housing; a control unit with power supplies; a reverse voltage source and DC preamplifier; and a shielded cable with BNC connectors. You need to supply an oscilloscope with X-Y facility. Includes instructions.Specifications:Tube:4-electrode arrangement with indirectly heated cathodeMax. tube acceleration voltage: 60VHousing dimensions: 11 x 11 x 19.5cmControl unit outputs:Modes: Manual for voltmeter or xy-recorder ramp (proportional to accelerating voltage) for oscilloscopes or PC interfaceFranck-Hertz signal: 0-12VAccelerating voltage: 0-7V (1/10 of actual for voltmeter)Controls:Set potentiometer for heater voltage, acceleration, reverse bias, and amplifier gainPower: 110VAC/80W; cord length 1.7m.Size: 23.5 x 23 x 17.5cm.
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