Atomic masses of147 m, 148 m, 149 m Tb,148Dy,150 m, 152 m Ho derived from decay properties
Abstract
Using nuclear fusion reactions of40Ar ions with112Cd,114Sn and116Sn and subsequent γ-ray spectroscopy, the probability ratios of positron emission and electron capture, β +/ EC k and β +/( EC+β +), are determined for individual β-transitions in the decay of147 m ,148 m ,149 m Tb,148Dy and150 m ,152 m Ho. From comparison with theoretical ratios the following Q EC values, given in keV, are derived:147 m Tb, 4.620(60);148 m Tb, 5.730(30);149 m Tb, 3.610(50);148Dy, 2.680(30);150 m Ho, 6.625(120) and152 m Ho, 6.470(80). The present decay-energy data are compared with earlier measurements and the new information obtained for the mass surface around146Gd is discussed.
- Publication:
-
Zeitschrift fur Physik A Hadrons and Nuclei
- Pub Date:
- December 1985
- DOI:
- 10.1007/BF01411858
- Bibcode:
- 1985ZPhyA.320..595S