کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1684403 | 1010528 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electronic background rejection in a new ultra-low background alpha-particle counter
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Low background alpha-particle (α) counting is required in the semiconductor industry, where α’s produce single event errors. Industry road maps call for measuring α emissivities at 0.0005 α/cm2/h, while current commercial counter backgrounds are 0.005 α/cm2/h, a factor of 10 too high. This paper shows that by designing an ionization chamber so that ionization tracks collected from the sample have long risetimes while those collected from the anode have short risetimes, signal risetime analysis can distinguish α emanation location within the counter. Coupled with a guard electrode to reject tracks emitted from the counter sidewalls, the method can achieve backgrounds approaching 0.0001 α/cm2/h, a factor of 20 lower.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 263, Issue 1, October 2007, Pages 221–224
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 263, Issue 1, October 2007, Pages 221–224
نویسندگان
W.K. Warburton, B. Dwyer-McNally,