Accelerated Emission of Gamma Rays from the 31-yr Isomer of 178 Hf Induced by X-Ray Irradiation

@article{Collins1999AcceleratedEO,
  title={Accelerated Emission of Gamma Rays from the 31-yr Isomer of 178 Hf Induced by X-Ray Irradiation},
  author={Carl B. Collins and Farzin Davanloo and M. C. Iosif and R{\'e}mi Dussart and J. M. Hicks and Sarkis Karamian and Calin Alexandru Ur and Iovitzu Popescu and Vladimir Kirischuk and J. J. Carroll and H. Roberts and Patrick Mcdaniel and C. E. Crist},
  journal={Physical Review Letters},
  year={1999},
  volume={82},
  pages={695-698}
}
A sample of 6.3{times}10{sup 14} nuclei of the 4-quasiparticle isomer of {sup 178}Hf having a half-life of 31thinspthinspyr and excitation energy of 2.446thinspthinspMeV was irradiated with x-ray pulses from a device typically used in dental medicine. It was operated at 15thinspthinspmA to produce bremsstrahlung radiation with an end point energy set to be 70 or 90thinspthinspkeV. Spectra of the isomeric target were taken with a high purity Ge detector. Intensities of selected transitions in… 

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