کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8175949 1526363 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The point spread function of electrons in a magnetic field, and the decay of the free neutron
ترجمه فارسی عنوان
توزیع نقطه تابع الکترونها در یک میدان مغناطیسی و فروپاشی نوترون آزاد است
کلمات کلیدی
نوترونها، بتا پوسیدگی، آشکارسازهای ذرات،
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
چکیده انگلیسی
Experiments in nuclear and particle physics often use magnetic fields to guide charged reaction products to a detector. Due to their gyration in the guide field, the particles hit the detector within an area that can be considerably larger than the diameter of the source where the particles are produced. This blurring of the image of the particle source on the detector surface is described by a suitable point spread function (PSF), which is defined as the image of a point source. We derive simple analytical expressions for such “magnetic” PSFs, valid for any angular distribution of the emitted particles that can be developed in Legendre polynomials. We investigate this rather general problem in the context of neutron β-decay spectrometers and study the effect of limited detector size on measured neutron decay correlation parameters. To our surprise, insufficient detector size does not affect the accuracy of such measurements much, even for rather large radii of gyration. This finding can considerably simplify the layout of the respective spectrometers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 763, 1 November 2014, Pages 112-119
نویسندگان
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