Determination of metal traces in tantalum by proton activation analysis

Determination of 13 elements with atomic numbers between 12 and 47 by 14-MeV helium-3 activation analysis

“…The particles that are commonly used are protons, deuterons, tritons, helium-3 and helium-4 ions (1)(2)(3)(4)(5). Protons have been used (6)(7)(8) also to find heavy element impurities in high purity metals, minerals, etc. Sometimes other techniques like proton activation followed by x-ray counting and PIXE (particle induced x-ray emission) have been used (9,10) for trace element study.…”