| 摘要 |
PURPOSE:To efficiently measure a radiation ray of low energy by adsorbing tritium converted to tritium water, by a collecting plate being a part of a detector. CONSTITUTION:A portable pocket dosimeter for opening a Lauritsen foil detecting electrode 18 consisting of two sheets of a electrode foils of the rear end part of a rod-like electrode 12 by an ionization charge detected by a detecting part 10, and measuring the radioactive concentration by its degree is provided with a converting container 22 provided with a catalyst 22a of platinum and palladium, etc. on the inner wall, a lead-in part 24 for leading in measured air containing tritium water being steam and other radioactive substance, and a collecting plate 26 for adsorbing and collecting the radioactive substance and consisting of such materials as molecular sieve, silica gel, activated carbon, etc. On the detecting surface side of the collecting plate 26, a mesh- like cathode plate 10b is provided. In such a way, a portable personal monitor which can measure exactly a radiant ray of low energy can be offered.
|
