We have been studying the electron-capture in **1**6**3Ho as a method for determining the mass of electron neutrino. The **1**6**3Ho sources were produced with the **1**6**4Dy(p, 2n) reaction by means of a method of internal irradiation. We applied the PIXE method to determine the total number of **1**6**3Ho atoms in the source. Proton beams of 3 Mev and a method of 'external standard' were employed for nondestructive analysis of the **1**6**3Ho source as well as an additional method of 'internal standard'.
|Number of pages||7|
|Journal||Report of Research Center of Ion Beam Technology, Hosei University. Supplement|
|Publication status||Published - 1984 Dec 1|
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