Radiation by a neutron in a magnetic field

Autor:	Gerald L. Pollack, Daniel R. Stump
Rok vydání:	1998
Předmět:	Larmor precession Physics Magnetic energy Anomalous magnetic dipole moment Neutron magnetic moment Proton magnetic moment Quantum mechanics General Physics and Astronomy Magnetic dipole Electron magnetic dipole moment Spin magnetic moment
Zdroj:	European Journal of Physics. 19:59-67
ISSN:	1361-6404 0143-0807
DOI:	10.1088/0143-0807/19/1/009
Popis:	The precessional motion of a neutron in a magnetic field decays as energy is lost. This paper presents two calculations, one semiclassical and the other quantum mechanical, for the rate of decay of precession from an initial position, in which the magnetic moment precesses in the plane perpendicular to , to the final, equilibrium, position in which the magnetic moment is parallel to . First the problem is solved semiclassically, using Maxwell's equations, by considering the energy lost by magnetic dipole radiation. Second the problem is solved quantum mechanically, using perturbation theory and Fermi's Golden Rule, by considering the energy lost by photon emission. Finally, the results obtained by these two methods are compared and examples are given.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ce4feef20ba1c4417ef1dcd44dc9ffdd https://doi.org/10.1088/0143-0807/19/1/009 Zobrazit plný text záznamu