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单词
氢钟
释义
氢钟
Encyclopedia
工学
频率标准
释
hydrogen maser
氢钟
以氢原子基态两个超精细能级间跃迁频率为参考(频率为1.420405751786吉赫兹),通过锁定环路来锁定晶体振荡器,使晶体振荡器能够输出高稳定度和高准确度时间频率信号的原子钟。氢钟采用的工作原子为氢原子,又称氢原子频率标准(简称氢频标)、氢原子钟。
Physics
原子、分子物理学
hydrogen clock
氢钟
Astronomy
hydrogen clock
氢钟
随便看
atmosphere-ocean coupling
atmosphere of the Earth
atmosphere of the times
atmosphere pressure chemical ionization
atmosphere pressure chemical ionization (APCI)
atmosphere zenith delay
atmospheric absorption
atmospheric acoustics
atmospheric aerosol measurement instruments
atmospheric aerosols
atmospheric agitation
atmospheric analysis
atmospheric and ionospheric radio wave propagation effects
atmospheric attenuation
atmospheric attenuation of infrared radiaton
atmospheric boundary layer
atmospheric boundary layer wind tunnel
atmospheric bridge
atmospheric carbon dioxide concentration
atmospheric center of action
atmospheric chaos
atmospheric characteristics
atmospheric chemical kinetics
atmospheric chemical model
atmospheric chemistry
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