Electron Capture Decay Energies of 153Gd and 175Hf

Abstract

The electron capture Q values of 153Gd and 175Hf are analysed by using properties of their /3 decays to different levels belonging to the same rotational family in the daughter atoms. The results are Q = 500 $go\; keV\; for\; 153Gd\; and\; Q\; =\; 700$ go\; keV\; for\; 175Hf.\; They\; agree\; with\; data\; from\; nuclear\; reactions\; but\; reject\; smaller\; values\; based\; on\; K\; capture\; probabilities.$$