查询词典 cosmogenic

The results suggest that natural TL of the three samples with known depth positions had depth distribution such as meteoritic cosmogenic nuclides, which was smaller with increasing distance from the current surface, indicating the conditions of cosmic ray exposure of the Jilin chondrite.

对3个已知取样深度和3个未知取样部位的吉林陨石样品的热释光研究表明，其自然热释光值具有宇宙成因核素含量相似的性质即深度分布效应，随着样品距离表面位置的增大而降低，这表征了母体暴露期间宇宙射线的分布状况。

Cosmogenic nuclide surface exposure dating is a newly developed isotopic dating technique in the past few years.

宇宙成因核素地表暴露测年方法，是近年来迅速发展起来的一种新的同位素地质年代学方法。

This paper introduces the features of ideal samples for analysis of in-situ-produced cosmogenic nuclide s of 10Be and 26Al.

着重介绍原地生成宇宙成因核素10Be和26Al理想样品的特点、野外采集注意事项、实验室分离与纯化以及加速器质谱测量用靶样制备等。

There is an introduction to Mars meteorites, and detailed descriptions of individual Mars meteorites. Each document about the individual meteorites contains all existing information such as petrography, whole rock and mineral chemistry, radiogenic, cosmogenic and stable isotope data and weathering.

该站点详细的介绍了火星陨石及其各自的具体特点，这些以PDF格式保存的档案文件包含了岩石记述学、岩石和矿物化学、射电数据、宇宙测年数据、稳定同位素数据等。

Using peculiar horn-shaped antennas, U-2 wrecker planes, satellites and particle accelerators, scientists hit tardily pieced unitedly the cosmogenic jigsaw, and this movie charts the resistless grounds for a aggregation created by a Big Bang.

使用新奇的角状天线，U-2间谍飞机，卫星和粒子加速器，科学家们渐渐拼织出了宇宙理论，本纪录片为您展示支持"创世宇宙大爆炸"理论的压倒性证据。

Based on technical processing of high-resolution SPOT images and aerophotos, detailed mapping of offset landforms in combination with field examination and displacement measurement, and dating of offset geomorphic surfaces by using carbon fourteen (14C), cosmogenic nuclides (10Be 26Al) and thermoluminescence methods, the Holocene sinistral slip rates on different segments of the Altyn Tagh Fault are obtained. The slip rates reach 17.5 mm/a on the central and western segments west of Aksay Town, 11 mm/a on the Subei—Shibaocheng segment, 4.8 mm/a on the Sulehe segment and only 2.2 mm/a on the Kuantanshan segment, a easternmost segment of the ATF. The sudden change points for loss of sinistral slip rates are located at the Subei, Shibaocheng and Sulehe triple junctions where NW-trending active thrust faults splay from the ATF and propagate southeastward.

在高分辨率SPOT卫星数字影像和大比例尺航片处理、断错地貌制图、野外核实与位移测量基础上，利用宇宙成因核素（10Be、26Al）、碳十四（14C）和热释光等多种测年手段，厘定了各断错地貌面的形成年龄，得到了阿尔金断裂带不同段落全新世左旋走滑速率：阿克赛以西的中、西段左旋走滑速率可达17.5 mm/a，肃北—石包城段为11 mm/a左右，疏勒河口段减少到4.8mm/a左右，东端宽滩山段仅约2.2 mm/a，左旋走滑速率突变点位于阿尔金断裂带中东段存在分支活动逆断层向南东扩展的肃北、石包城和疏勒河等三联点上。

Cosmogenic 21Ne was utilized to determine exposure ages of young subaerial basaltic lava flows from the Newer Volcanic Province, western Victoria, Australia.

宇宙中产生的21氖被用来测定从澳大利亚的西部维多利亚新火山省流出的地面玄武岩熔岩的暴露年龄。

The concentration of Cosmogenic nuclides is not only constrained by production rates and exposure time, and also closely related to surface erosion. Furthermore, the concentration is affected by geomagnetic intensity, shielding, chemical weathering, and sample geometry as well. These factors affecting Cosmogenic nuclide concentration should be calibrated when surface exposure age is calculated.

地表物质中宇宙成因核素浓度除了受到核素生成速率和地表物质的暴露时间制约外，还与地表侵蚀速率密切相关，此外，地磁场强度、遮蔽、化学风化及样品的几何位置等也会对核素浓度产生一定影响，在求算样品的地表暴露年代时，应对这些因素进行相应的校正。

Specifically measured cosmogenic 3He/21Ne ratios, on the same samples, is powerful for evaluating the validity of calculated cosmogenic 3He and 21Ne surface exposure ages.

对同一样品进行具体的3氦/21氖比例测定，是评价3氦和21氖表面暴露时间计算值有效性的有力工具

Cosmogenic nuclides are primarily generated by reaction of target nuclei exposed near earth surface and galactic cosmic radiation. The reactions producing Cosmogenic nuclides mainly involve spallation, capture of neutrons and muon reaction.

宇宙成因核素主要是由来源于银河系的宇宙射线与暴露于地表的物质作用形成的，作用机制主要包括裂变、中子捕获和介子反应。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。