Workshop on Secular Variations in the Rates of Production of Cosmogenic Nuclides on Earth; February 2-4, 1996; Los Alamos National Laboratory, Los Alamos, New Mexico

这项建议要求支持于1996年2月2日至4日在新墨西哥州洛斯阿拉莫斯国家实验室举行一次关于地球岩石中宇宙形成核素的生产速率的国际、多学科和多用途讲习班。这个讲习班的目标是：把我们这些正在努力确定地球宇宙核素生产速度的人与在对这项工作有用的领域工作的人聚集在一起。这些科学家的主要兴趣和专长包括：地质学和地质年代学；加速器和常规质谱法；核化学与分析化学古磁学与地磁偶极子场强研究；太阳活动对宇宙射线的影响；及校正14C时标。提供一个论坛，讨论a)生产率的测量；B)与宇宙射线强度和与生产率相关的核截面的模型；C)关于生产率时空变异性的知识现状。收集建议，帮助指导和集中未来校准宇宙核素表面暴露数据方法的努力。编写当前相关出版物的注释参考书目并进行评价。40多位受邀演讲者将发表论文。三天内将进行具体议题的讨论和一般性讨论。吸取的经验教训和对未来研究的建议将与摘要和大多数相关出版物的注释书目一起出版。与传统的放射性碳时标一样，地球宇宙核素时标也需要校准为真实（历法）时标。在宇宙成因技术尚处于起步阶段，宇宙成因核素暴露定年的地质应用数量迅速增加的情况下，这次研讨会是必要和及时的。最近的呼吁（Clark和其他人，在回顾中）将先前的10Be（和其他核素）产量估计（Nishiizumi et al., 1989）对-13 kyr的暴露率的估计更改17%，这只是该研讨会迫切需要的一个例子。提议的研讨会将由美国国家科学基金会和洛斯阿拉莫斯国家实验室以及地球物理和行星物理研究所共同支持。请NSF提供资金用于参与者支持和出版费用。国家科学基金会的资金不会用于支付工资或支持外国参与者的旅行或支持LANL的员工。

Gosse 9526774 This proposal requests support for an international, multi-disciplinary, and multi-purpose workshop on the production rates of cosmogenic nuclides in terrestrial rocks, to take place at Los Alamos National Laboratory, New Mexico, February 2-4, 1996. The goals of this workshop are: to gather those of us who are working to determine this production rates of terrestrial cosmogenic nuclides with those working in fields that are useful to this undertaking. This includes scientists whose principal interests and expertise include: geology and geochronology; accelerator and conventional mass spectrometry; nuclear and analytical chemistry paleomagnetism and geomagnetic dipole field intensity research; the influence of solar activity on cosmic rays; and calibration of the 14C timescale. to provide a forum in which to discuss A) measurements of production rates, B) models relating to cosmic-ray intensity and nuclear cross sections to production rates, C) the current state of knowledge concerning temporal and spatial variability of productio rates. to assemble recommendations that help steer and focus future efforts to calibrate cosmogenic nuclide surface exposure data methods. to compile an annotated bibliography of current relevant publications with evaluation. More than forty invited speakers will present papers. Discussions on specific topics and general discussions will occur throughout the three days. Lessons learned and recommendations for future research will be published along with the abstracts and an annotated bibliography of most relevant publications. The terrestrial cosmogenic nuclide time scale, like the conventional radiocarbon time scales, needs to be calibrated to the true (calendric) time scale. While the cosmogenic techniques are in their infancy and as the number of geological applications of cosmogenic nuclide exposure dating rapidly increases, this workshop is necessary and timely. The recent call (Clark and others, in review) to change by 17% the pre vious 10Be (and other nuclides) production rate estimate (Nishiizumi et al., 1989) for -13 kyr of exposure is just one example of the urgent need of this workshop. The proposed workshop will be share-supported between NSF and Los Alamos National Laboratory and the Institute of Geophysics and Planetary Physics. Funds from NSF are requested for participant support and publication costs. No NSF funds will be used for salaries or for support of foreignn participant travel or participants who are employees of LANL.