Novel Equipment for In Situ Alpha Spectrometry with Good Energy Resolution
| Autor: | Tero Karhunen, Jani Turunen, Markus Wirta, Asko Turunen, Kari Peräjärvi, Roy Pöllänen, Teemu Siiskonen |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Resolution (mass spectrometry) Epidemiology business.industry Health Toxicology and Mutagenesis Spectrum Analysis Evaporation Analytical chemistry Alpha particle Alpha Particles Collimated light Optics Radiation Monitoring Area source Radiology Nuclear Medicine and imaging business Energy (signal processing) Ambient pressure Air filter |
| Zdroj: | Health physics. 109(6) |
| ISSN: | 1538-5159 |
| Popis: | An approach for in situ alpha spectrometry that allows one to measure the spectra with good energy resolution at ambient air pressure has been developed recently. Here, novel equipment is introduced for in situ measurements. Neither vacuum pumps nor radiochemical sample processing are necessary. Flat and smooth surfaces are ideal sources provided that the radionuclide contamination represents a thin layer on the surface. Other sources, such as air filters or evaporation residues, are also possible. Alpha particle collimation is used to obtain good energy resolution, but the equipment can also be used without collimation. An estimation of the detection efficiency with and without collimation is given using an extended area source containing 241Am. |
| Databáze: | OpenAIRE |
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