title: Measurements of single event spectra with a wall-less proportional counter in low LET radiation fields.
abstract: Measurements have been made on 60Co gamma rays from a point source and on 6 MV roentgen rays from a linear accelerator with a wall-less proportional counter. Single event spectra have been measured in sites of 0.5-2 mum in diameters stimulated with a tissue equivalent gas. Calculations of the relative variance in LET are performed and compared with the relative variance of the measured distributions for estimates about the straggling contribution.
mesh_terms: D003037:Cobalt Radioisotopes; D004581:Electronics; D004735:Energy Transfer; D005720:Gamma Rays; D011829:Radiation Dosage; D012588:Scintillation Counting / Q000295:instrumentation; D013679:Technology, Radiologic
chemical_list: D003037:Cobalt Radioisotopes