کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1771472 1020769 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Probing the Earth’s interior with a large-volume liquid scintillator detector
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
Probing the Earth’s interior with a large-volume liquid scintillator detector
چکیده انگلیسی

A future large-volume liquid scintillator detector would provide a high-statistics measurement of terrestrial antineutrinos originating from β-decays of the uranium and thorium chains. In addition, the forward displacement of the neutron in the detection reaction ν¯e+p→n+e+ provides directional information. We investigate the requirements on such detectors to distinguish between certain geophysical models on the basis of the angular dependence of the geoneutrino flux. Our analysis is based on a Monte-Carlo simulation with different levels of light yield, considering both unloaded and gadolinium-loaded scintillators. We find that a 50 kt detector such as the proposed LENA (Low Energy Neutrino Astronomy) will detect deviations from isotropy of the geoneutrino flux significantly. However, with an unloaded scintillator the time needed for a useful discrimination between different geophysical models is too large if one uses the directional information alone. A Gd-loaded scintillator improves the situation considerably, although a 50 kt detector would still need several decades to distinguish between a geophysical reference model and one with a large neutrino source in the Earth’s core. However, a high-statistics measurement of the total geoneutrino flux and its spectrum still provides an extremely useful glance at the Earth’s interior.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Astroparticle Physics - Volume 27, Issue 1, February 2007, Pages 21–29
نویسندگان
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