Search results for "Proton-to-electron mass ratio"

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A direct determination of the proton-electron mass ratio

1978

The cyclotron resonance of protons and electrons in a magnetic field of 5.7 Tesla produced by a superconducting solenoid has been measured. Protons and electrons were alternately confined in an electrostatic quadrupole trap. The quotient of the cyclotron frequencies provides a first direct determination of the proton-electron mass ratio. The result ofM p /M e =1836.1502(53) agrees with other more precise but indirect determinations of this quantity.

PhysicsNuclear and High Energy PhysicsNuclear TheoryCyclotronCyclotron resonanceElectronProton-to-electron mass ratioFourier transform ion cyclotron resonanceElectron cyclotron resonancelaw.inventionNuclear physicslawQuadrupolePhysics::Accelerator PhysicsAtomic physicsIon cyclotron resonanceZeitschrift f�r Physik A: Atoms and Nuclei
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A direct determination of the proton electron mass ratio

1980

The cyclotron frequencies of free protons and electrons in a magnetic field of 5.81 Tesla with superimposed electrostatic quadrupole field have been measured. The increase of energy connected with a transition at cyclotron frequency is detected by the measurement of the time of flight through an inhomogeneous magnetic field. From the ratio of the measured cyclotron frequencies of both particles the proton electron mass ratio is deduced. The resultm p /m e =1,836.1527(11) agrees within the limits of error (0.6 ppm) with the value of the indirect determination.

PhysicsNuclear and High Energy PhysicsTime of flightlawCyclotronCyclotron resonanceElectronAtomic physicsProton-to-electron mass ratioElectron cyclotron resonanceFourier transform ion cyclotron resonanceIon cyclotron resonancelaw.inventionZeitschrift f�r Physik A: Atoms and Nuclei
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