Direct two-photon excitation of isomeric transition in thorium-229 nucleus
Abstract
A possibility of the two-photon excitation of an isomeric state in a nucleus of thorium-229 has been discussed. The fluorescence intensity of the excitation is demonstrated to be identical for the irradiation of nuclei with either monochromatic light or polychromatic radiation consisting of a sequence of short light pulses of the same intensity. The two-photon excitation of Th^{3+} ion in an electromagnetic trap with a focused laser beam with a wavelength of about 320 nm and power of 100 mW can lead to the absorption saturation, at which the fluorescence emission with the frequency of the transition in a nucleus is maximal. In crystals doped with Th^{4+} to a concentration of about 10^{18} cm^{-3} and irradiated with a laser radiation 10 W in power, the emission of several photons per second with a wavelength of about 160 nm becomes possible.
Keywords
Cite
@article{arxiv.1211.5437,
title = {Direct two-photon excitation of isomeric transition in thorium-229 nucleus},
author = {V. I. Romanenko and Ye. G. Udoviskaya and L. P. Yatsenko and A. V. Romanenko and A. N. Litvinov and G. A. Kazakov},
journal= {arXiv preprint arXiv:1211.5437},
year = {2012}
}
Comments
13 pages, 1 figure; http://www.ujp.bitp.kiev.ua