Automatic Apparatus for the Determination of Helium Diffusion in Solids

Autor:	J. B. Holt, R. W. Crawford, J. W. Frazer
Rok vydání:	1971
Předmět:	Materials science Residual gas analyzer chemistry.chemical_element Partial pressure Quantitative determination chemistry Physics::Atomic and Molecular Clusters Neutron Sublimation (phase transition) Irradiation Atomic physics Instrumentation Helium A titanium
Zdroj:	Review of Scientific Instruments. 42:674-677
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.1685198
Popis:	An apparatus has been designed and built to determine automatically the rate of release of helium from various solids as a function of temperature. The diffusion of He in single crystals of neutron irradiated LiH is used to describe the operation of the apparatus. Samples can be maintained in a vacuum or in an automatically maintained gas (other than noble gas) atmosphere and held at temperatures from 200 to 1400°C. Helium evolved from the sample is periodically removed. A quantitative determination and standardization for He are automatically performed. If a gas atmosphere is used, this is removed from the helium by use of a titanium sublimation pump. The He which remains is then measured with a low resolution high sensitivity residual gas analyzer (partial pressure gauge). The system is capable of measuring at least 10−10 cm3 STP helium.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0f1615a8c3cbbc74ae57cb5688ac821f https://doi.org/10.1063/1.1685198 Zobrazit plný text záznamu