Abstract
When atomic spectral lines are observed with sufficient resolution, they appear to have in general a complex structure, each line being in fact a group of nearby components.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Notes
- 1.
See e.g. exercise 4 and A.R. Edmonds, Angular Momentum in Quantum Mechanics (Princeton University Press, 1950).
- 2.
For all details, see e.g. J.D. Jackson, Classical Electrodynamics, sect. 11.8 (Wiley, 1975).
- 3.
See e.g. J.D. Jackson, Classical Electrodynamics, sect. 5.6 (Wiley, 1975).
- 4.
S.G. Karshenboim and V.D. Ivanov, Hyperfine structure in hydrogen and helium ion, Phys. Lett. B 524, p. 259–264, 2002.
- 5.
H.M. Goldenberg, D. Kleppner, and N.F. Ramsey, Phys. Rev. Lett. 8, 361 (1960).
- 6.
R. Vessot et al., Phys. Rev. Let. 45, 2081 (1980).
- 7.
For the recent developments of atomic clocks, see e.g. W. Itano and N. Ramsey, Accurate measurement of time, Scientific American, p. 46, July 1993.
- 8.
B.J. Bloom, T.L. Nicholson, J.R. Williams, S.L. Campbell, M. Bishof, X. Zhang, W. Zhang, S.L. Bromley, J. Ye, An optical lattice clock with accuracy and stability at the \(10^{-18}\) level, Nature 506, 71-75, 2014, doi:1038/nature12041.
- 9.
This very long lifetime is due to the combination of two facts; the energy difference is very small, and the emission proceeds through a magnetic dipole transition (while the atomic resonance lines correspond to electric dipole transitions).
- 10.
This long lifetime is due to two effects: the energy difference between the two levels is small; and it is a magnetic dipole transition much weaker than the electric dipole transitions. The advantage is that, symmetrically, these radiowaves are absorbed weakly.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2016 Springer International Publishing Switzerland
About this chapter
Cite this chapter
Basdevant, JL. (2016). Addition of Angular Momenta. In: Lectures on Quantum Mechanics. Graduate Texts in Physics. Springer, Cham. https://doi.org/10.1007/978-3-319-43479-7_13
Download citation
DOI: https://doi.org/10.1007/978-3-319-43479-7_13
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-43478-0
Online ISBN: 978-3-319-43479-7
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)