Proceedings of the International School of Physics "Enrico Fermi.", Volume 17N. Zanichelli, 1962 - Nuclear physics |
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Page 36
... power such as that from a multiplier is available [ 26 ] . Contrary to the case of Section 9 , we have now a large absorption coefficient for the pumping transition , but the available pumping power is very small . The power absorbed by ...
... power such as that from a multiplier is available [ 26 ] . Contrary to the case of Section 9 , we have now a large absorption coefficient for the pumping transition , but the available pumping power is very small . The power absorbed by ...
Page 41
... power in a transmission line which is at thermal equilibrium where the source and the load are matched to the ... power AP flowing in each direction is AP = 1 AW 2 L C = kT △ v , which is Nyquist's result . The noise temperature of an ...
... power in a transmission line which is at thermal equilibrium where the source and the load are matched to the ... power AP flowing in each direction is AP = 1 AW 2 L C = kT △ v , which is Nyquist's result . The noise temperature of an ...
Page 60
... power re- quired is about 10 W and at 100 Å it is 105 W. This power is lost by spon- taneous emission in all directions . Such a large power supply is quite dif- ficult , and probably masers will not be made to work any time soon for ...
... power re- quired is about 10 W and at 100 Å it is 105 W. This power is lost by spon- taneous emission in all directions . Such a large power supply is quite dif- ficult , and probably masers will not be made to work any time soon for ...
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Common terms and phrases
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