Half-life of the Ho164 by the (γ,n) reaction from laser Compton scattering γ rays at the electron storage ring NewSUBARU

The half-life of an isomer in Ho-164 was measured by using photodisintegration reactions. The photons were generated by Compton scattering of laser photons and relativistic electrons at the electron storage ring NewSUBARU in the super photon ring 8-GeV (SPring-8) facility. The half-life is 36.4 +/- 0.3 min. This value is about 3% shorter than the previous value 37.5(-0.5)(+1.5) min reported in 1966.