Light yield non-proportionality of undoped YAP scintillator

• Scintillation properties of undoped YAP crystal were studied. The emission spectra show a very intense light component at 360 nm. Analysis of the light pulse shape resulted in five components, four of them, with time constants of 38+/-2 ns, 92+/-3 ns, 7.5+/-0.5 mu s and 24+/-3 mu s, representing high light intensity. The light yield was found to be temperature dependent, N-ph=3090+/-130 ph/MeV at liquid nitrogen temperature and N-ph=1440+/-60 ph/MeV at room temperature. Also the light yield non-proportionality shows temperature dependence and is more pronounced at room temperature.

Nyckelord

Gamma detectors (scintillators

CZT

HPG

HgI etc)

Scintillators

scintillation and light emission processes (solid

gas and liquid

scintillators)

liquid-nitrogen temperatures

intrinsic energy resolution

area

avalanche photodiodes

optical-spectra

single-crystals

pure nai

yalo3

ce3

bgo

nonproportionality

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