Nonproportional response of LaBr3:Ce and LaCl3:Ce scintillators to synchrotron x-ray irradiation

被引：48
|
作者：
Khodyuk, Ivan V. [1 ]
Dorenbos, Pieter [1 ]
机构：
[1] Delft Univ Technol, Luminescence Mat Res Grp, Fac Sci Appl, NL-2629 JB Delft, Netherlands
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2010年 / 22卷 / 48期
关键词：
ENERGY-RESOLUTION SCINTILLATOR; LANTHANUM HALIDE SCINTILLATORS; NON-PROPORTIONALITY; CE3+; CRYSTALS; NONLINEARITY; NAI(TL); DESIGN;
D O I：
10.1088/0953-8984/22/48/485402
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The nonproportional scintillation response of LaBr3 doped with 5% Ce3+ and of LaCl3 doped with 10% Ce3+ was measured using highly monochromatic synchrotron irradiation. To estimate the photon response, pulse height spectra at many finely spaced energy values between 9 and 100 keV were measured. The experiment was carried out at the X-1 beamline at the Hamburger Synhrotronstrahlungslabor (HASYLAB) synchrotron radiation facility in Hamburg, Germany. Special attention was paid to the x-ray fluorescence escape peaks as they provide us with additional information about photon response in the range 1.2-14.5 keV for LaBr3:Ce and 2.0-11.6 keV for LaCl3:Ce. A rapid variation of the photon response curve is observed near the lanthanum K-electron binding energy for both scintillators. A dense sampling of data was performed around this energy and those data are used to apply a method, which we call K-dip spectroscopy. This method allows us to derive the electron response curves of LaBr3:Ce and LaCl3:Ce down to energies as low as 0.1 keV.
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页数：7
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