This work details an application of collinear resonance ionization spectroscopy for the separation of short-lived isomeric states and their subsequent study with decay spectroscopy.It reports the successful construction ofa novel decay spectroscopy apparatus that can operate at pressures below 1 x 10 DEGREES-9 mbar. The method is demonstrated by separating the nuclear ground and isomeric states of 204Fr and performing alpha-decay spectroscopy. An equivalent mass spectrometer would require 4.6 million times as much resolution to achieve the same result. This work unambiguously confirms the existence of a second isomeric state in 204Fr. The author also demonstrates the effectiveness of this method for laser spectroscopy and identification of hyperfine-structure components with energy tagging. This method was successfully used in 202Fr to identify ground and isomeric states. The measurement of 202Fr reported in this thesis demonstrates a factor of 100 improvement in sensitivity compared to state-of-the-art fluorescence techniques. The work reported in this thesis won the author the IOP Nuclear Physics Group Early Career Priz
"Dick!-O Dick,-whar are ye honey?" A hollow-cheeked wisp of a boy arose from the dark corner where he had been crouching like a frightened animal, and with cautious steps drew near the bed. Timidly he touched the wasted hand that lay upon the dirty coverlid. "What ye want, maw?"
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