Precise emission probabilities of gamma-rays of 159Gd

Measurement of emission probabilities for principal gamma-rays of 159Gd with 4πβ(ppc)–γ(HPGe) coincidence apparatus has given precise values as indicated by uncertainties of about 1%. Improved certainties are seen when comparing the present results with emission probabilities evaluated in Nuclear Data Sheets (Helmer, 1994, p. 72) for which the uncertainties are about 24%. The improvement resulted in precise decay scheme parameters of the nuclide.