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

该提案要求支持一个关于地球岩石中宇宙成因核素产生率的国际、多学科和多目的讲习班，该讲习班将于1996年2月2日至4日在新墨西哥州的洛斯阿拉莫斯国家实验室举行。这次讲习班的目标是：把我们这些致力于确定地球宇宙成因核素的生产率的人与那些在对这项事业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;核化学和分析化学;古地磁学和地磁偶极场强度研究;太阳活动对宇宙射线的影响;以及14 C时标的校准。提供一个论坛，讨论A）生产率的测量，B）与宇宙射线强度和核截面到生产率有关的模型，C）关于生产率的时间和空间变化的知识现状。收集有助于指导和集中今后校准宇宙成因核素表面照射数据方法的工作的建议。汇编一份附有评价的现有相关出版物的附加说明的书目。40多位特邀演讲者将发表论文。在这三天里，将进行关于具体议题的讨论和一般性讨论。所吸取的经验教训和对今后研究的建议将沿着摘要和最相关出版物的附加说明的书目一起出版。与传统的放射性碳时标一样，地球宇宙成因核素时标需要校准到真实的（日历）时标。由于宇宙成因技术尚处于起步阶段，而且随着宇宙成因核素暴露测年的地质应用数量迅速增加，这次讲习班是必要和及时的。最近的呼吁（Clark等人，在审查中）将先前的10 Be（和其他核素）生产率估计值改变17%（Nishiizumi等人，1989年）的约13 kyr的曝光量只是这个讲习班的迫切需要的一个例子。拟议的研讨会将由NSF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。要求NSF提供资金用于参与者支持和出版费用。NSF的资金将不会用于支付工资或支持外国参与者的旅行或LANL员工的参与者。

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.