A new method of alpha ray measurement using a Quadrupole Mass Spectrometer

✍ Scribed by Y. Iwata; Y. Inoue; M. Minowa

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 390 KB
• Volume: 577
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2007.04.123

✦ Synopsis

We propose a new method of alpha (a)-ray measurement that detects helium atoms with a Quadrupole Mass Spectrometer (QMS). A demonstration is undertaken with a plastic-covered 241 Am a-emitting source to detect a-rays stopped in the capsule. We successfully detect helium atoms that diffuse out of the capsule by accumulating them for 1-20 h in a closed chamber. The detected amount is found to be proportional to the accumulation time. Our method is applicable to probe a-emitting radioactivity in bulk material.