Internal bremsstrahlung accompanying non-unique second-forbidden β-decay of 36Cl

The internal bremsstrahlung spectrum accompanying the non-unique second-forbidden β-decay of 36Cl is measured using the magnetic deflection technique. The true IB spectrum is obtained with the help of the inverse of the detector response matrix. The experimental data in the energy interval 80 to 700 keV are compared with the theoretical spectra of Knipp and Uhlenbeck, and Bloch, Lewis and Ford, and Chang and Falkoff. The agreement between the measurement and theory is not good throughout the energy region of the present investigation, though the experimental points are close to the second-forbidden scalar theory of Chang and Falkoff. (Auth.)