Search for long-lived isomeric states in neutron-deficient thorium isotopes

@article{Lachner2008SearchFL,
  title={Search for long-lived isomeric states in neutron-deficient thorium isotopes},
  author={J. Lachner and I. Dillmann and T. Faestermann and G. Korschinek and M. Poutivtsev and G. Rugel},
  journal={Physical Review C},
  year={2008},
  volume={78},
  pages={064313}
}
The discovery of naturally occurring long-lived isomeric states (t{sub 1/2}>10{sup 8} yr) in the neutron-deficient isotopes {sup 211,213,217,218}Th[A. Marinov et al., Phys. Rev. C 76, 021303(R) (2007)] was reexamined using accelerator mass spectrometry (AMS). Because AMS does not suffer from molecular isobaric background in the detection system, it is an extremely sensitive technique. Despite our up to two orders of magnitude higher sensitivity we cannot confirm the discoveries of neutron… Expand
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