کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1822454 1526342 2015 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Novel techniques for high precision refractive index measurements, and application to assessing neutron damage and dose in crystals
ترجمه فارسی عنوان
تکنیک های جدید برای اندازه گیری شاخص انکسار با دقت بالا و کاربرد آن برای ارزیابی آسیب نوترون و دوز در بلورها
کلمات کلیدی
آسیب تابشی، دوزیمتری نوترون، شاخص شکستگی، تداخل سنجی فاز بینابینی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
چکیده انگلیسی

In this work we present novel techniques for high precision index of refraction measurements for transparent crystals, and demonstrate a change from neutron irradiation. Radiation damage affects the structure of material, which can be read out nondestructively in transparent crystals. There is some difference in gamma-ray and neutron interactions which may be useful in characterization. Ionization from gamma rays produces color centers in the material, producing distinct spectral absorption, and some small shift in the index of refraction. Neutrons produce atomic recoils and, while the recoils do some ionization, they have a much greater efficiency for lattice displacement than do gamma rays, and these displacements can have a greater effect on the index of refraction. Using CaF2 crystals exposed to neutron radiation, together with a new high precision technique of detecting changes of index of refraction, we establish proof that this type of measurement can be used to monitor neutron exposure. This can provide a basic study of material changes with radiation and, with calibration of material in known neutron fields, this may even find application to neutron dosimetry.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 784, 1 June 2015, Pages 198–201
نویسندگان
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