Volume 85, Number 5, March 2009
|Number of page(s)||6|
|Published online||17 March 2009|
Coulomb energy contribution to the excitation energy in 229Th and enhanced effect of variation
School of Physics, The University of New South Wales - Sydney, NSW 2052, Australia
2 New Zealand Institute for Advanced Study, Massey University - Auckland, New Zealand
3 School of Physics and Astronomy, Tel Aviv University - Tel Aviv, 69978, Israel
4 Budker Institute of Nuclear Physics - 630090, Novosibirsk-90, Russia
5 Novosibirsk State University - 630090, Novosibirsk-90, Russia
Corresponding author: firstname.lastname@example.org
Accepted: 13 February 2009
We estimated the polarization contribution of Coulomb energy to the spacing between the ground and first excited state of the 229Th nucleus as a function of the deformation parameter . We show that despite the fact that the odd particle is a neutron, the change in Coulomb energy between these two states can reach several hundreds keV from this contribution. This means that the effect of the variation of the fine-structure constant may be enhanced times in the E = 7.6 eV “nuclear clock” transition between the ground and first excited states in the 229Th nucleus. To extract the full value of , we propose to measure isomeric shift of atomic levels and nuclear electric quadrupole moments in 229Th.
PACS: 06.20.Jr – Determination of fundamental constants / 21.10.Sf – Coulomb energies, analogue states
© EPLA, 2009
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