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Old Dominion | PHYS 827
Atomic Physics
Professors
- Leposava Vuskovic,
- ,
- Vuskovic, L
19 sample documents related to PHYS 827
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Old Dominion PHYS 827
Magnetic Resonance (a) Consider a particle with magnetic moment is the constant called the gyromagnetic ratio ( = q/2m) and J is the total angular momentum of the particle. The particle is moving in a constant magnetic r r r field B0 . The magnetic f -
Old Dominion PHYS 827
Old Dominion University Physics 827 Graduate Atomic Physics Spring 2009 Professor L. Vukovi COURSE INFORMATION General Physics 827 is an introduction to atomic structure, atom interactions with photon/ electron, behavior of atoms in external fields -
Old Dominion PHYS 827
Electric Polarizabilities of the Hydrogenic Ground States (Budker, Problems 2.1 and 2.2) Stark Effect Based on the shift of the ground state energy, E1 = - 2 E one can estimate the polarizabilty of the ground-state hydrogen atom. For the purpose -
Old Dominion PHYS 827
Stimulated Emission of Radiation Lasers We recall that the emission of a photons in a transition from state b to state a, under the influence of the applied radiation field, the stimulated emission, is equal to the absorption rate depends directly on -
Old Dominion PHYS 827
Interaction of Atoms with Light In the preceding chapter we were discussing the interaction of external fields with the electrons in the atom and the effects the external fields induce on the atom states. The interaction with photons, that occur sim -
Old Dominion PHYS 827
Spectral Line Intensities and the Lifetimes of Excited States According to dipole approximation, the relative intensity of transition from an initial state a to a final state k is proportional to the quantity r 2 r rka = k r a Instead of 2 r 2 r -
Old Dominion PHYS 827
Magneto-Optical Traps Example 6.2 in Budker et al. Devices used for confinement of atom in a given volume are called traps. There are many techniques for trapping the atoms, but the most popular is the magneto-optical trap (MOT). Just like the optic -
Old Dominion PHYS 827
Fine Structure (Relativistic Corrections) Orbital electrons have a relatively small speed in comparison to the speed of light, but still large enough for relativistic effects to be observed. The fine structure of one-electron atoms consists of smal -
Old Dominion PHYS 827
Scattering of X-rays High-frequency electomagnetic waves, X-rays (discovered and named 1895 by W. K. Rntgen) proved to be another useful tool in the development of atomic physics. Laue, Friedrich, and Knipping first demonstrated the diffraction of X- -
Old Dominion PHYS 827
Corrections to the Central Field Approximation In the discussion of the fine structure of one-electron atoms, we defined the correction term due to the spin-orbit interaction as r r H 2 = (r )L S This description can be extended to the many-elec -
Old Dominion PHYS 827
Ground State of Helium We will discuss briefly the approximative wave functions for the helium atom, where the interaction between the electrons is neglected the independent particle model. In this case the Hamiltonian is given by 1 2 Z 1 2 Z ^ ^ H -
Old Dominion PHYS 827
Fermi Electron Gas Fermi electron gas is a system consisting of a large number N of free electrons confined in a certain region of space. We shall suppose that the N electrons are confined in to a large cube of side L. Each of the electrons is moving -
Old Dominion PHYS 827
r r The electric dipole approximation assumes that r is small and exp ik r 1 As a consequence, calculation is simplified and it is good approximation for the optical transitions. The Electric Dipole Approximation Interaction of Atoms with Light -
Old Dominion PHYS 827
Hydrogen Atom in External Electromagnetic Field The Zeeman Effect P. Zeeman, 1896 1 The Zeeman Effect This original account that appeared as a small translation note in Nature in 1897 illustrates the distance between the original observation and -
Old Dominion PHYS 827
Cold Atoms Laser Cooling (Example 6.1 in Budker et al.) Laser cooling is a group of techniques that are based on the mechanical effects of light on the external state of an atom its position and momentum. Consider an idealistic system consisting of -
Old Dominion PHYS 827
atomic region. Choose the z-axis along the direction of the electric field. The field is strong enough that the fine structure effect can be neglected. This assumption holds for fields strength of order 107 V/m or larger. The Hamiltonian of the hydro -
Old Dominion PHYS 827
Observations of Atomic Spectra Science of rainbow Persian astronomers al-Shirazi and al Farisi (XII-XIII century) origin of the rainbow reflection and refraction of light from water droplet Theodoric of Freiburg (1307) accurate explanation of sin -
Old Dominion PHYS 827
Total Angular Momentum of an Atom - vector model Jz obtained from a vector sum of all spin and orbital angular momenta of the electrons it contains. Total angular momentum of an atom is If the total angular momentum is with magnitude J = r J, 2h -
Old Dominion PHYS 827
Monoelectron Oscillator in a Penning Trap \"Geonium atom\" (See Budker et al., example 1.6) Electron is confined in a small cylindrical volume around the zaxis executing magnetron (circular) and cyclotron (cycloid) motion. 1 [H. Dehmelt, Am. J. of P
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