Average Energy Lost by Sulfur-35 Beta Rays per Ion Pair Produced in Air
- 1 December 1957
- journal article
- research article
- Published by JSTOR in Radiation Research
- Vol. 7 (6) , 570-580
- https://doi.org/10.2307/3570573
Abstract
The average energy lost by S35 [beta]-rays per ion pair produced in air, Wa, has been determined from the Bragg-Gray relation. An aqueous solution of Na2S35O4, whose energy emission rate per gram was known from microcalorimetric measurements at the National Bureau of Standards, was used as one electrode of a parallel-plate ionization chamber. By extrapolation, the ionization current density was determined under conditions satisfying the Bragg-Gray principle. The value of Wa obtained by this method is 33.6 [plus or minus] 0.3 ev per ion pair, which is in good agreement with results reported by other workers in the past few years.Keywords
This publication has 2 references indexed in Scilit:
- Use of Callendar's "radio-balance" for the measurement of the energy emission from radioactive sourcesJournal of Research of the National Bureau of Standards, 1954
- Standards for low values of direct capacitanceJournal of Research of the National Bureau of Standards, 1948