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Results tagged with atomic-physics
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user 36793
Atomic physics is the field of physics that studies atoms as an isolated system of electrons and an atomic nucleus. It is primarily concerned with the arrangement of electrons around the nucleus and the processes by which these arrangements change. This includes ions as well as neutral atoms and, unless otherwise stated, for the purposes of this discussion it should be assumed that the term atom includes ions.
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Orbital parity of simple bound states in atomic and particle physics
In the central field approximation, the Hamiltonian of a many-electron atom is assumed to comprise of a large spherically symmetric part and a small spherically asymmetric component. Since the asymmet …
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Orbital parity of simple bound states in atomic and particle physics
The parity operator commutes with the Hydrogen atom Hamiltonian. The energy eigenfunctions are parity eigenstates with orbital parity $(-1)^\ell$ which follows from the fact that $Y_{\ell m}(\theta,\p …
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Why should the spherically asymmetric part of the effective potential be small in the centra...
In the central field approximation, each electron is supposed to move in an effective or average potential contributed by its attractive interaction with the nucleus and repulsive interaction with the …
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Why is the energy of $2s_{1/2}$ greater than the energy of $2p_{1/2}$ after the Lamb shift i...
However, the discussion here says that Lamb shift affects only S state.
The statement that Lamb shift affects only $s$ states is only approximately correct i.e., true in first order radiative cor …
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What is the physical significance of the overlap integral?
What is the physical significance of the overlap integral in the covalent bond formation (say, the $H_2$ molecule)?
as far as I can understand, even if the overlap integral is zero, the Heitler-Lon …
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The Lennard-Jones potential and the Pauli exclusion principle
The force between two atoms takes the generic shape of a Lennard-Jones potential. It has an attractive part caused by dipole-dipole attraction and a short-range repulsive part which is said to be caus …
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Is there a similar law of atomic de-excitation like radioactive disintegration?
If one starts with $N_0$ nuclei at $t=0$, then after time $t$, the number of nuclei left un-disintegrated are given by $$N(t)=N(0)\exp(-\lambda t)\tag{1}.$$
Is there a similar statistical decay law …
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Few questions about the physical basis of metals colours?
I'm not sure. But I think, copper has its characteristic colour because it is the wavelength corresponding to "copper-colour" has least skin-depth, and is therefore reflected from the surface of metal …
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Reaching equilibrium in a blackbody and light-matter interaction
Suppose we have a metallic cavity maintained at a fixed temperature. Suppose we start with any distribution of radiation that is not in equilibrium with the container. Gradually, when the equilibrium …
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Spread of the energy levels and sharp energy eigenvalues of the Schrodinger equation of the ...
Solving the Schroedinger equation for the H-atom (or any other system, say a particle in a box, or harmonic oscillator or anything), we obtain the energy eigenvalues are sharp with no spread. However, …
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