A photoelectric alpha particle detector
S. C. Curran, W. R. Baker, University of California, Los Angeles. Laboratory of Nuclear Medicine and Radiation Biology, U.S. Atomic Energy Commission
Technical Information Division, Oak Ridge Operations, 1947 - Technology & Engineering - 4 pages
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106 electron-volts a-rays adjusted alpha counter amplified apparatus approximately arrangement Assuming average amplitude background beam bias blue phosphor material calculations capable Chariton COLLIMATING corresponded coulombs counting coupled Current amplification current pulses data DETECTOR determined device duration efficiency electric field emitted ergs ergs/sec expected value EXPERIMENTAL exposed fisec flash foregoing geometry greater High sensitivity important initial intensity ion current isec length less linear load luminous energy maximum MDDC measured Mechanical features method of detection method of scintillations Mil 12 Mil multiplier type nature noise level number observable occasionally OSCILLOSCOPE output particle of energy particle scintillations peak photocell PHOTOELECTRIC presence pulses produced radiations rate recorded release 9.7 resolving result scaling circuit scintillation produced screen material screen of zinc shallow ionization chamber shown in Figure shows small sources suitable surface tube type 1P21 variation Various voltage volts watt wave wavelength x 10-3 coulombs zinc sulphide screens