Gamma-ray investigation of different silver isotope decay

The investigation of different silver isotope decay gamma-rays fromA=102 toA=113 was made using two Ge(Li) detectors with resolution 3·7–6 keV. The results obtained and data from other papers were analyzed to correct and to complete the decay schemes of these nuclei. The radioactivity having a half-time of 3 min. is considered as a new isotope of⁹⁷Ag. Three new states were added to the level scheme of¹⁰²Ag in agreement with the results of the -gamma and gamma-gamma coincidences. Two gamma-ray transitions were added to the scheme of excited levels of¹⁰³Pd. About 60 transitions were found in the decay of the two known isomers of¹⁰⁴Ag. Most of them are located in the decay scheme of the 19 excited levels of the¹⁰⁴Pd isotope. Positive parity was assigned to all of them.The¹¹²Ag and¹¹³Ag gamma-ray spectra were first obtained with the aid of a Ge(Li) spectrometer. The observed transitions were placed in a decay scheme containing 16 levels in the case of¹¹²Cd and 5 levels in the case of¹¹³Cd.The properties of the low excited even-even isotope states of Ru, Pd and Cd are discussed and compared.The authors are deeply indebted to M. K. Nikitin for participation in the chemical separation of a series of samples and to L. F. Protasova for help in the measurements. One of the authors (E.P.G.) expresses his sincere thanks to Prof. V. Petrílka for kindly providing him with excellent conditions for research in Prague.