放射性元素
- 与 放射性元素 相关的网络例句 [注:此内容来源于网络,仅供参考]
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A radioactive transuranic element; discovered by bombarding curium with alpha particles.
一种放射性超铀元素,在用α粒子轰击锔时发现。
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Element; discovered by bombarding curium with alpha particles.
一种放射性超铀元素,在用α粒子轰击锔时发现。
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The heaviest nonradioactive halogen, it is a nearly black crystalline solid (diatomic molecule I2) that sublime s to a deep violet, irritating vapour.
是最重的非放射性卤素,为几近黑色的晶体(双原子分子I2),升华后为深紫色刺激性的蒸气,在自然界从不以元素状态存在。
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Thermal neutron radiography is a useful complementary tool of the other non-destructive testing methods for the hydrogenous materials and heavy metal subassembly,and thermal neutron tomography has not been developed in China.By the use of the CCD-based thermal neutron digital radiography facility in SPRR-300 reactor and the Al column sample with holes,the projecting data of 36 multiplied 552 groups are collected.
热中子照相技术在检测含氢材料、重金属组件结构、原子序数相近的不同元素、放射性材料等方面弥补了X光等其他无损检测技术的不足,广泛用于重金属组件、火工品等武器部件的质量检测和库存武器可靠性和有效性评估中。
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People through nuclear reactions, have been synthesized 17 kinds of atomic number greater than 92 of the transuranic elements, and thousands of The new kinds of radioactive nuclides, and by high-energy and ultra-high energy-ray beam and the interaction of atomic nuclei and found hundreds of kinds of short-lived particles, namely, baryon, meson, lepton, and particle resonance states of these particles has led to a new field of study - the birth of particle physics since the age of .70, nuclear physics has entered a deep development and wide application of new, more mature stage, on the one hand the development of particle acceleration and detection techniques, expanding people's research in nuclear means, the other hand, nuclear technology to serve the national economy, for example, for the development and utilization of nuclear energy to provide more accurate nuclear data; the use of isotope tracer technique diagnosis and treatment of disease; the use of radiation and irradiation preservation of food, irradiation breeding .
人们通过核反应,已经人工合成了17种原子序数大于92的超铀元素和上千种新的放射性核素,并且通过高能和超高能射线束和原子核的相互作用,发现了上百种短寿命粒子、即重子、介子、轻子和共振态粒子,对这些粒子的研究导致了一门新学科——粒子物理学的诞生。70年代以来,核物理进入了纵深发展和广泛应用的新的更成熟的阶段,一方面发展粒子的加速技术和探测技术,扩充人们研究原子核的手段,另一方面将核技术服务于国民经济中,例如,为核能的开发利用提供更为准确的核数据;利用同位素示踪技术诊断和治疗疾病;利用射线及辐照技术保存食品、辐照育种等。
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Polonium is a highly radioactive element and a metalloid.
钋是高放射性的元素,金属。
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Arguments and evidence cited against a miraculous origin of the shroud images include a letter from a medieval bishop to the Avignon pope claiming personal knowledge that the image was cleverly painted to gain money from pilgrims; radiocarbon tests in 1988 that yielded a medieval timeframe for the cloths fabrication; and analysis of the image by microscopist Walter McCrone, who concluded ordinary pigments were used.
争论和证据却与裹尸布的神奇起源相反,包括一封中世纪的主教写给教宗阿维尼翁的信,声称肖像是有人运用容貌知识聪明地印上去,为了从朝圣者身上获得金钱;1988年,碳的放射性同位元素测试得出这是一块中世纪时期制造的伪造物;分析肖像的显射镜技术人员沃尔特指出,这只是使用了一种平常的颜料。
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Conventional radiochemical methods such as alpha spectrometry, neutron activation analysis, liquid scintillation system, fission track and gamma spectrometry for the quantitative determination of neptunium and plutonium often require complicated and time-consuming sample preparation and separation procedures.
研究环境中铀、镎、钚等长寿命放射性核素的精密测定,对保护公众安全和保护环境,对了解核设施的历史操作情况和现状,都具有重要意义。环境样品基体复杂,铀、镎和钚等锕系元素含量非常低,在复杂的生态条件下,这些核素常常具有复杂多变的化学形态,要准确测定其含量,必须要有灵敏可靠的检测方法。
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Then she found that pitchblende was more radioactive than uranium by itself.
玛丽注意到钍元素也是具有放射性的。
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Forearm venous volume was assessed by radionuclide plethysmography.
前臂静脉容量通过放射性核元素体积描记法进行评估。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力