A DECATRON SCALER WITH PRELIMINARY SETTING OF THE COUNTING TIME OR PULSE NUMBER

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Izmerital'naya Tekh.

OSTI ID:4201123

Breydo, I Ya

A description of a decatron scaler containing a unit for preliminary setting the counting time or a given number of pulses is presented. The block diagram of the device is shown. It will count pulses during an arbitrarily fixed time with manual start and stopping, count pulses with automatic stopping after a given time has elapsed, and measure the duration of recording with automatic stopping when the given number of pulses has been stored. The principal operational circuit elements of the device are shown. (TCO) A simple, sensitive, and reliable technique was devised for the radioassay of nonvolatile, water- soluble tritium compounds. The substance to be analyzed is dissolved in an aqueous solution of a thickening agent, preferably sodium O-(carboxymethyl) cellulose or sodium alginate. The solution is placed in a shallow planchet, and after evaporation of the water, the resulting film, which is "infinitely thick" to tritium beta particles, is counted with a 2 pi , windowless, gas-flow, proportional counter. By means of an empirical factor, determined with a substance of known radioactivity, the counts are converted to microcuries. In a film having a thickness of 0.7 mg/cm/sup 2/, the counting efficiency is about 4 percent; the standard deviation from the mean, obtained in a series of routine measurements, was less than 2 percent. An assay can readily be made with tritium- containing material having 0.01 microcurie of radioactiviiy. The method, which is applicable to nonvolatile, water-soluble solids, solutions, or liquids, is suitable for routine analyses. (auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-14-000357
• OSTI ID: 4201123
• Journal Information: Izmerital'naya Tekh., Journal Name: Izmerital'naya Tekh. Vol. Vol: No. 7
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CIRCUITS
COUNTERS
DEKATRONS
ELECTRON TUBES
ENGINEERING AND EQUIPMENT
OPERATION
PULSES
RECORDING SYSTEMS
SCALERS