Open AccessThe soft X-ray emission from various elements after oxidation
Author(s) -
Letitia P. Davies
Publication year - 1929
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1929.0113
Subject(s) - photoelectric effect , molybdenum , table (database) , tube (container) , materials science , cobalt , group (periodic table) , metallurgy , chemistry , analytical chemistry (journal) , composite material , environmental chemistry , optoelectronics , organic chemistry , computer science , data mining
In 1927, Richardson and Robertson published the results of some experiments on the soft X-ray efficiencies of 14 different elements. They found that there was no very great difference in tire efficiencies, the highest, that of molybdenum, being roughly twice that of carbon, which was the lowest. The results show that in any group of the periodic table, the efficiency is high towards the middle of the group and lower at the end of it. In the present experiments, the efficiencies of various elements alter oxidation have been studied. The apparatus used was the same as that used before by the writers for investigating the photoelectric properties of metals in the soft X-ray region, The last photoelectric plate to be tested was of cobalt, and as this was found to lie as satisfactory as any of the others, it was left in the tube.