Precise measurement of the gamma-ray emission probabilities of 38Cl

Accurate gamma-ray emission probabilities for 38Cl have been determined from measurements of the disintegration rate and gamma-ray intensities. Recommended gamma-ray emission probabilities within the literature have systematic uncertainties of 4.8%, whereas the current measurements gave uncertainties less than 1%. The absolute emission probabilities of the 1642.7 and 2167.7 keV gamma rays were 0.3338 ± 0.0032 and 0.4477 ± 0.0031, respectively, and the relative intensities of the 1642.7, 2167.7 and 3810.3 keV gamma rays were 74.77 ± 0.41, 100.00 ± 0.42 and 0.062 ± 0.004, respectively.