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www.ask.com/faqcentral/21_cm.html
your answer is: d)atomic hydrogen the 21 cm line is a result of a transition between the two hyperfine energy levels within the 2s orbital caused by having the spin magnetic moment...
www.ask.com/faqcentral/cm_21.html
your answer is: d)atomic hydrogen the 21 cm line is a result of a transition between the two hyperfine energy levels within the 2s orbital caused by having the spin magnetic moment...
Hyperfine structure - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Hyperfine_structure
Carl Sagan and Frank Drake considered the hyperfine transition of hydrogen to be a sufficiently universal phenomenon so as to be used as a base unit of time ...
Pioneer plaque - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Pioneer_plaque
3.1 Hyperfine transition of neutral hydrogen; 3.2 Figures of a man and a woman; 3.3 Relative position of the Sun to the center of the Galaxy and 14 pulsars ...
Hydrogen line - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Hydrogen_line
The microwaves of the hydrogen line come from the atomic transition between the two hyperfine levels of the hydrogen 1s ground state. The frequency of the ...
tf.nist.gov/general/pdf/13.pdf
determination of the frequency of the H1 hyperfine transition. (F = 1, mF =O) ... In terms of the frequency of the Cs133 hyperfine transition (F = 4, mF = 0) c-* (F = ...
boards.straightdope.com/sdmb/showthread.php?t=612372
Pioneer Plaques: What is the "hyperfine transition of neutral hydrogen" and why is it used? General Questions.
www.physicsforums.com/showthread.php?t=383978
Hyperfine Transition Levels Atomic, Solid State, Comp. Physics discussion.
www.haystack.mit.edu/ast/arrays/deut/pdf/Rogers_Deut.pd... www.haystack.mit.edu/ast/arrays/deut/pdf/Rogers_Deut.pdf
OBSERVATIONS OF THE 327 MHz DEUTERIUM HYPERFINE TRANSITION. A. E. E. Rogers and K. A. Dudevoir. MIT Haystack Observatory, Westford, MA ...
link.aps.org/doi/10.1103/PhysRevA.46.R5317
electron and nuclear motion and have determined the hyperfine transition frequencies. The calculated frequencies agree to better than 175 kHz with all the ...
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