Absolute measurements of He in metals using chemical treatments

Ito, Yoshifumi*; Batchuluun, C.*; Yasuda, Keisuke*; Ishigami, Ryoya*; Endo, Nobuyuki*

GC/MS (Gas Chromatography/Mass Spectrometer) with the help of Chemical treatments has been applied to measure amount of helium (He) atoms in metals. Metal samples of cupper (Cu) contained He atoms were prepared using a 200kV ion implantation machine. The samples were solved in 0.5cc volume of 20% nitric acid in a H type reaction tube filled with nitrogen gases at 1 atmospheric pressure and He atoms in Cu metal were exhausted completely into the nitrogen gases. He analysis using GC/MS reveals that the metals contained 10 to 10 atoms of He. The He signal intensity and He ions implanted to the metals revealed good proportional relation.