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浅谈添加液氦有关的知识 被引量:2

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摘要 氦是最轻的元素之一,也是一种稀有惰性元素,空气中的含量为百万分之五,天然气中的含量为百分之二;液氦是温度最低的液体,主要充当制冷剂,也是目前用于超导MR中唯一的线圈制冷剂。液氦的生产主要来自天然气,氦蕴藏越最丰富的国家是美国,我国属于贫氦国,我国目前所用液氦几乎全部来自进口;液氦的质量好坏主要看纯度,
出处 《医用放射技术杂志》 2005年第3期46-47,共2页 Journal of Medical Radiology Technology
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  • 1潘屏南,李树祥,林意群.现代大型医用设备:原理、结构和临床应用[M].北京:中国医药科技出版社,2001:22-63. 被引量:2
  • 2Heller F,Liu T S. Magnetostratigraphic dating of loess deposits in China[J]. Nature, 1982,300:431-433. 被引量:1
  • 3Burbank D W, Li J J. Age and palaeoclimatic significance of the loess of Lanzhou, north China [ J 3. Nature, 1985,316 : 429-431. 被引量:1
  • 4Guo Z T, Ruddiman W F, Hao Q Z, et al. Onset of Asian desertification by 22 Myr ago inferred from loess deposits in China [ J ]. Nature ,2002,416 : 159-163. 被引量:1
  • 5Zhu R X, Hoffman K A, Potts R, et al. Earliest presence of humans in northeast Asia[ J~. Nature ,2001,413:413-417. 被引量:1
  • 6Foster J H. A paleomagnetic spinner magnetometer using a fluxgate gradiometer[ J 1- Earth and Planetary Science Letters, 1966,1 ( 6 ) : 463 -466. 被引量:1
  • 7Goree Fuller M. Magnetometers using RF-driven squids and their applicatlons in rock magnetism and paleomagnetism [ J]. Reviews of Geophysics, 1976,14:591-608. 被引量:1
  • 8Lu H J,Xiong S F. Magnetostratigraphy of the Dahonggou section, northern Qaidam Basin and its bearing on Cenozoic tectonic evolution of the Qilian Shan and Ahyn Tagh Fault [ J]. Earth and Planetary Science Letters,2009,288 ( 3-4 ) : 539-550. 被引量:1
  • 9Fang X M, Zhang Y L, Meng Q Q. High-resolutionmagnetostratigraphy of the Neogene Huaitoutala section in the eastern Qaidam Basin on the NE Tibetan Plateau, Qinghai Province, China and its implication on tectonic uplift of the NE Tibetan Plateau[ J]. Earth and Planetary Science Letters ,258 (!-2) :293-306. 被引量:1
  • 10Dai S, Fang X M, Dupont-Nivet G, et al. Magnetostratigraphy of Cenozoic sediments from the Xining Basin:Tectonic implications for the northeastern Tibetan Plateau[J]. Journal of Geophysical Research ,2006,111, B11102, doi : 10. 1029/2005 JB004187. 被引量:1

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