کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4724877 | 1639848 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Depth-dependence of the production rate of in situ 14C in quartz from the Leymon High core, Spain
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
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چکیده انگلیسی
To constrain the depth-dependence of in situ 14C production we measured the cosmogenic 14C concentration of quartz separates along a quartzite core from the Leymon High site in northwest Spain. A total of 16 quartz samples were measured over a depth range of 1-1545 cm (3-4017 g cmâ2). The obtained 14C profile was modeled using a neutron production rate, exponentially decreasing with depth, and a fast and negative muon production parameterized as a function of the local muon flux as derived by (Heisinger et al., 2002a, 2002b). This model yields a total negative muon capture probability of 1.72 (+0.22/â0.56) Ã 10â2 and a fast muon reaction cross section of 0 (+11.8/â0.00) μb. Rescaled to sea level high latitude using a Lal/Stone scaling scheme, these estimates yield a surface muon production rate of 3.31 (+0.43/â1.07) and 0 (+0.42/â0.00) at·gâ1 yrâ1 for negative muon capture and fast muons, respectively. This is the first muon production estimate for in situ 14C from a natural setting and is within uncertainty of the previous experimental estimates. The present contribution also provides new long-term blank and standard (PP-4, CRONUS-A & CRONUS-N) in situ 14C data from the ETH Zürich 14C extraction line.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary Geochronology - Volume 28, June 2015, Pages 80-87
Journal: Quaternary Geochronology - Volume 28, June 2015, Pages 80-87
نویسندگان
M. Lupker, K. Hippe, L. Wacker, F. Kober, C. Maden, R. Braucher, D. Bourlès, J.R. Vidal Romani, R. Wieler,