Novel Equipment for In Situ Alpha Spectrometry with Good Energy Resolution.
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.
*STUK-Radiation and Nuclear Safety Authority, P.O. Box 14, FI-00881 Helsinki, Finland; †PROVEDOS Oy, Laippatie 4b, FI-00880 Helsinki, Finland.
Roy
R
Pöllänen
Jani
J
Turunen
Tero
T
Karhunen
Kari
K
Peräjärvi
Teemu
T
Siiskonen
Markus
M
Wirta
Asko
A
Turunen
D000512:Alpha Particles; D011834:Radiation Monitoring / Q000295:instrumentation / Q000379:methods; D013057:Spectrum Analysis / Q000295:instrumentation* / Q000379:methods