atomic standard

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atomic standard [ə′täm·ik ′stan·dərd]

(physics)

Any supposedly immutable property of an atom, such as the wavelength or frequency of a characteristic spectral line, in terms of which a unit of a physical quantity is defined.

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No references found			At the beginning of this early period of development of atomic frequency standards, both quartz and atomic standards were achieving frequency uncertainties of about 2 X [10. Primary atomic frequency standards at NIST by Wineland, D.J. / Journal of Research of the National Institute of Standards and Technology Parker, head of NIST's atomic standards group, which includes Jefferts' team. Tossing cold atoms like confetti, atomic-fountain clocks launch a new ... by WEISS, PETER / Science News Several of FEI's new products to address these markets include: --A ruggedized Rubidium atomic standard for challenging environments to upgrade existing and new military platforms. Frequency Electronics Participates in Needham Growth Conference by Business Wire			atomic magnetic moment Atomic Mass atomic mass unit atomic moisture meter Atomic Nucleus Atomic Number atomic operation atomic orbital atomic paramagnetism atomic particle atomic percent atomic photoelectric effect Atomic Physics atomic pile atomic polarization Atomic Power Plant Atomic Radii atomic radius atomic reactor atomic rocket atomic scattering factor atomic second Atomic Spectra atomic spectroscopy atomic spectrum atomic standard atomic stopping power atomic structure Atomic structure and spectra atomic surface burst atomic susceptibility atomic theory atomic time atomic underground burst atomic underwater burst atomic unexcited state atomic units atomic vibration atomic volume atomic weapon atomic weight atomic-beam frequency standard atomic-beam resonance atomicity Atomism atomization Atomizdat atomizer atomizer burner atomizer mill atomizing humidifier			atomic rocket Atomic Safety and Licensing Appeal Board Atomic Safety and Licensing Appeal Panel Atomic Safety and Licensing Board Atomic Safety and Licensing Board Panel Atomic Scale Design Network Atomic scattering factor Atomic second Atomic second Atomic shell Atomic Short-Range Order Atomic size Atomic Space and Development Authority Atomic Space Lab Atomic spectra Atomic spectra Atomic spectra Atomic Spectra and Oscillator Strengths Atomic spectral line Atomic spectrometry Atomic spectroscopy Atomic Spectroscopy and Collisions Using Slow Antiprotons Atomic Spectroscopy with Electrothermal Atomization atomic spectrum atomic spectrum Atomic Sphere Approximation Atomic Spin Orbital Atomic Spring Constant Atomic Spring Constant Atomic Spring Constant atomic standard Atomic stopping power Atomic Strike Approval Request Atomic Strike Crew Broadcast Report Atomic Strike Net Atomic Strike Plan Control Group Alternate Atomic structure Atomic structure Atomic structure Atomic structure and spectra atomic structure theory atomic structure theory atomic structure theory atomic surface burst atomic susceptibility Atomic symbol Atomic symbol Atomic Terrorism Atomic Testing Museum atomic theory atomic theory atomic theory Atomic Time Atomic Time Atomic Time Atomic Time Zone Atomic Top Level Domain Filter Atomic Trades and Labor Council Atomic Transmitter Based Analysis atomic underground burst atomic underground burst

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