Proceedings of the International School of Physics "Enrico Fermi.", Volume 17N. Zanichelli, 1962 - Nuclear physics |
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Page 60
... particularly notable . 1 ) Very coherent radiation . The phase fluctuations in a maser oscillator discussed above can also be expressed in terms of a bandwidth for radiation emitted by the oscillators ; this is ( 66 ) 60 C. H. TOWNES.
... particularly notable . 1 ) Very coherent radiation . The phase fluctuations in a maser oscillator discussed above can also be expressed in terms of a bandwidth for radiation emitted by the oscillators ; this is ( 66 ) 60 C. H. TOWNES.
Page 61
... emitted beam may be very directional . Since the wavefront is coherent over the entire reflecting plate , its angular dispersion when emitted in a beam is given only by diffraction , and is approximately 2 / L , or in the range 10- to ...
... emitted beam may be very directional . Since the wavefront is coherent over the entire reflecting plate , its angular dispersion when emitted in a beam is given only by diffraction , and is approximately 2 / L , or in the range 10- to ...
Page 254
... emitted from an excited atom depends upon the inequality of population of the Zeeman sublevels of the upper energy level . An oscillating magnetic field applied at the resonance frequency tends to equalize the populations of the Zeeman ...
... emitted from an excited atom depends upon the inequality of population of the Zeeman sublevels of the upper energy level . An oscillating magnetic field applied at the resonance frequency tends to equalize the populations of the Zeeman ...
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absorption coefficient actinide alcalins amplifier atomes atomic beam BROSSEL cavité cellule césium champ magnétique cohérence collisions couplage coupling d'onde DEHMELT détection dipolaire dipole electronic emission energy expériences expérimentales facteur de Landé fonction fonction d'onde frequency gaz tampon given gives ground state H₁ Hence high hyperfine structure interaction isotopes klystron l'absorption l'atome l'état excité l'état fondamental level lower magnetic field maser masers matrice densité matrix elements measured mercure mesure méthode microwave modulation molecules neptunium niveaux noise nuclear number observe observed obtain obtained optical order oscillant oscillator oven photon Phys polarisation pompage optique populations power pression pumping quadrupole quantum radiation radiofréquence raie de résonance rare earth relaxation Rendiconti S.I.F. resonance résonance magnétique result rubidium saturation SHIMODA signal small sodium spectrometer spin nucléaire spins électroniques structure hyperfine système T₁ T₂ température used valeur values wave