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The Fundamental Constants Data Center is focused on physics relevant to the
determination of values of the fundamental constants of physics and
chemistry. Activities include gathering and analyzing information for, and
carrying out periodic least-squares evaluations of the constants. When
necessary, new theoretical calculations are carried out to provide
additional information for the adjustments. The Data Center is also involved
in the development of the International System of Units, which is the basis
for expressing the values of the constants. Support for research relevant to
the fundamental constants and tests of basic laws of physics is provided
through the Precision Measurements Grants Program.
Group Members
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Circular Rydberg States
Plots of the probability density of two (nonrelativistic) hydrogenic Rydberg
states with quantum numbers n = 10 and
l = 9. In (a), the state has magnetic quantum number
|m| = 9 and the density in the plane of polar angle
θ = π/2 is shown. In (b), the state has
m = 0 and the density in the plane of constant azimuthal
angle φ = 0 is shown. The two maxima are in the direction of
the polar angles θ = 0 and θ = π.
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Technical inquiries:
mohr@nist.gov
National Institute of Standards and Technology
100 Bureau Drive, Stop 8420
Gaithersburg, MD 20899-8420 |
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