Naslov
Effects of near-source photon scattering at the energy of 60 keV

Autori
Majer, Marija ; Budanec, Mirjana ; Jerbić-Zorc, Gorjana ; Pašić, Selim ; Uroić, Milivoj ; Vuković, Branko ; Ilakovac, Ksenofont

Izvornik
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (0168-9002) 524 (2004); 227-235

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
photon spectra; low energy; germanium detector; response function; shoulder; near-source Compton scattering

Sažetak
Compton scattering on electrons in materials in the vicinity of low-enery photon-emitting atoms and in the vicinity of the detector sensitive volume causes a continuous distribution below the full-energy peak (the "shoulder"). To study effects of the near-source Compton scattering, a collimator was used in front of a planar germanium detector to reduce the near-detector scattering. The measurements show that even a small mass in vicinity of emitting atoms, such as that of a standard calibration source plate (0.59 g), results in a considerable shoulder, whose shape depends very much on the orientation of the source plate. Additional mass near the source causes a strong enlargement of the shoulder, while the shape depends very much on its position. Calculations of single-Compton scattering on electrons in the vicinity of emitting atoms reproduce reasonably well the numbers of pulses and the shapes of the observed shoulders.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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