Experimental search for molecular-nuclear transitions H_2O\to^{18}Ne^*(4.522,1^-)\to^{18}F\to^{18}O in water molecules was carried out. The measurements were performed in a low-background laboratory at the Baksan Neutrino Observatory. Under the assumption that the above transitions take place, the estimate for the half-life time of water molecule was found to be about 10^{18} years.
@article{arxiv.nucl-ex/0001005,
title = {Experimental search for molecular-nuclear transitions in water},
author = {V. B. Belyaev and M. B. Miller and A. K. Motovilov and A. V. Sermyagin and I. V. Kuznetzov and Yu. G. Sobolev and A. A. Smolnikov and A. A. Klimenko and S. B. Osetrov and S. I. Vasiliev},
journal= {arXiv preprint arXiv:nucl-ex/0001005},
year = {2007}
}