Evaluation the decay data of (153)Gd.

(153)Gd decays to the excited states of (153)Eu through the electron capture decay mode. The evaluation of the complete decay scheme and data of (153)Gd including the recent new measurements are presented in this report. The limitation of relative statistical weight method (LRSW) was applied to average numbers throughout the evaluation. The uncertainty assigned to the average value was always greater than or equal to the smallest uncertainty of the values used to calculate the average. The half-life is determined to be 239.47+/-0.07 days. All known measured gamma-ray relative emission probabilities have been examined. And the gamma-ray emission probability of the reference gamma line of 97.431keV is recommended to be 29.5+/-0.5%. The calculated internal conversion coefficients and their uncertainties have been used to obtain the complete decay intensity balance. The other decay characteristics are calculated using the ENSDF analysis program. Finally the new (153)Gd decay scheme was re-built.