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Optical spectroscopy of an atomic nucleus: Progress toward direct observation of the 229Th isomer transition (2011)
Journal Article
Hehlen, M. P., Greco, R. R., Rellergert, W. G., Sullivan, S. T., DeMille, D., Jackson, R. A., …Torgerson, J. R. (2013). Optical spectroscopy of an atomic nucleus: Progress toward direct observation of the 229Th isomer transition. Journal of Luminescence, 133, 91-95. https://doi.org/10.1016/j.jlumin.2011.09.037

The nucleus of the thorium-229 isotope possesses a first excited nuclear state (229mTh) at an exceptionally low energy of 7.8±0.5 eV above the nuclear ground state (229gTh), as determined by earlier indirect measurements. This is the only nuclear exc... Read More about Optical spectroscopy of an atomic nucleus: Progress toward direct observation of the 229Th isomer transition.