کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1681703 1010445 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The upgraded external-beam PIXE/PIGE set-up at LABEC for very fast measurements on aerosol samples
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
The upgraded external-beam PIXE/PIGE set-up at LABEC for very fast measurements on aerosol samples
چکیده انگلیسی

At the 3 MV Tandetron accelerator of the LABEC laboratory of INFN in Florence, an external beam facility is fully dedicated to measurements of elemental composition of atmospheric aerosol. The experimental set-up hitherto used for this kind of applications has been upgraded with the replacement of a traditional Si(Li) detector for the detection of medium–high Z elements with a silicon drift detector (SDD) with a big active area (80 mm2) and 450 μm thickness, with the aim of obtaining better minimum detection limits (MDL) and reduce measuring times. The Upilex extraction window has been replaced by a more resistant one (Si3N4). A comparison between the old Si(Li) and the new SDD for aerosol samples collected on different substrata like Teflon, Kapton and Nuclepore evidenced the better performances of the SDD. It allows obtaining better results (higher counting statistics, lower MDLs) even in shorter measuring times, thus allowing very fast analysis of both daily and hourly samples.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 318, Part A, 1 January 2014, Pages 55–59
نویسندگان
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