首页> 外文期刊>Quaternary geochronology >Depth-dependence of the production rate of in situ C-14 in quartz from the Leymon High core, Spain
【24h】

Depth-dependence of the production rate of in situ C-14 in quartz from the Leymon High core, Spain

机译:西班牙莱蒙高芯岩中石英原位C-14生产率的深度依赖性

获取原文
获取原文并翻译 | 示例
           

摘要

To constrain the depth-dependence of in situ C-14 production we measured the cosmogenic C-14 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 cm(-2)). The obtained C-14 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/-0.56) x 10(-2) and a fast muon reaction cross section of 0 (+11.8/-0.00) mu b. 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/-1.07) and 0 (+0.421-0.00) at.g(-1) yr(-1) for negative muon capture and fast muons, respectively. This is the first muon production estimate for in situ C-14 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 C-14 data from the ETH Zurich C-14 extraction line. (C) 2015 Elsevier B.V. All rights reserved.
机译:为了限制原位C-14生产的深度依赖性,我们测量了西班牙西北部Leymon高地沿石英岩芯沿石英分离的宇宙成因C-14浓度。在1-1545厘米(3-4017 g cm(-2))的深度范围内总共测量了16个石英样品。所获得的C-14轮廓是使用中子生产率,随深度呈指数下降,快速和负的μ子产量进行建模的,其中,μ和负子产量取决于(Heisinger et al。,2002a,2002b)得出的局部μ子通量的函数。该模型产生的总负μon捕获概率为1.72(+ 0.22 / -0.56)x 10(-2),快速muon反应截面为0(+ 11.8 / -0.00)μb。使用Lal / Stone缩放方案将其重新缩放为海平面高纬度,这些估计得出的g(-1)年(-1)的表面μ子生产率为3.31(+ 0.43 / -1.07)和0(+ 0.421-0.00) )分别用于否定的μ子捕获和快速的μ子。这是自然环境下对C-14的第一个μ子产量估计,并且在先前实验估计的不确定性范围内。本文稿还提供了来自ETH Zurich C-14提取生产线的新的长期空白和标准(PP-4,CRONUS-A和CRONUS-N)原位C-14数据。 (C)2015 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号