A method has been developed for measuring the transfer of energy from a molecular beam to a surface. The method makes use of temperature sensitive Y‐cut quartz crystals. A crystal was placed in the beam and the energy transferred to its plating was determined by changes in its oscillating frequency. Crystals having a fundamental frequency of 10 Mc were used and an energy transfer rate of 50 μW could be detected. Results are given for the transfer of energy by Ar+ to an Au surface between 100 and 500 eV.

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© 1965 The American Institute of Physics.
1965
The American Institute of Physics
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