Coupling between the center of mass and relative degrees of freedom in a relativistic quantum composite and applications
Name
ICCF20PhononNuc.pdf
Description
Published version
Size
187.75 KB
Format
Adobe PDF
Checksum (MD5)
b03030712702dabff3cb2f33579a9531
Author(s)
Hagelstein, Peter L
Chaudhary, Irfan U.
Date Issued
2017
Journal
Journal of Condensed Matter Nuclear Science
Publisher
International Society of Condensed Matter Nuclear Scientists (ISCMNS)
Citation
Hagelstein, Peter L. and Irfan U. Chaudhary. "Coupling between the Center of Mass and Relative Degrees
of Freedom in a Relativistic Quantum Composite and Applications." Journal of Condensed Matter Nuclear Science 24 (2017): 114-122 © 2017 ISCMNS
Version
Final published version
Abstract
If we consider the nucleus as a relativistic composite, then we are able to derive from a many-particle Dirac model a coupling between the center of mass motion and internal nuclear degrees of freedom. This interaction can be rotated out in free space, but has the potential to give rise to new physics when two or more nuclei exchange phonons with a common vibrational mode. The simplest example of such a system is a homonuclear diatomic molecule in a frozen matrix, for which we are able to develop an expression for the second-order phonon-nuclear interaction that can result in a splitting of the nuclear energy levels as a result of excitation transfer between the nuclei. The phonon-nuclear coupling is an E1 interaction, so the low energy 6.237 keV E1 transition in ¹⁸¹Ta is special; this motivates an interest in molecular ¹⁸¹Ta₂ as a candidate for a Mössbauer experiment where the splitting might be observable. We also consider excitation transfer in the case of a macroscopic a Ta plate. Keywords: Down-conversion; Excitation transfer; Mössbauer effect; Phono-nuclear coupling
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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DOI of Published Version
http://coldfusioncommunity.net/wp-content/uploads/2018/08/114_JCMNS-Vol24.pdf
