کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1824233 1027332 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Measurement of ultimate tensile strength and Young modulus in LYSO scintillating crystals
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
پیش نمایش صفحه اول مقاله
Measurement of ultimate tensile strength and Young modulus in LYSO scintillating crystals
چکیده انگلیسی

Scintillating crystals are employed in high energy physics, in medical imaging, diagnostic and security. Two mechanical properties of lutetium–yttrium oxyorthosilicate cerium-doped Lu2(1−x)Y2xSiO5:Ce with x=0.1 (LYSO) crystals have been measured: the ultimate tensile stress (σUTS) and the Young elastic modulus (E). Measurements are made by means of a 4-points loading device and the experimental results account for an elastic–brittle stress–strain relation, which depends heavily on the specimen preparation and the material defects. σUTS along the [0 1 0] tensile direction ranges within 68.14 and 115.61 MPa, which, in the lowest case, is more than twice with respect to those measured for PbWO4 (PWO), exhibiting a marked difference between the annealed and the not-annealed samples. The mean elastic modulus (E), along the same direction, is E=1.80×1011 (±2.15×1010) N/m2, with lower dispersion respect to UTS data. This type of analysis and study can be included into quality control procedures of crystals, based on samples taken out of production; such procedures can be established for industrial processing of crystals aimed to the high energy physics (calorimeters) and medical imaging (PET, etc.) applications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 654, Issue 1, 21 October 2011, Pages 122–126
نویسندگان
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