Kurze Mitteilungen

Abstract

Μ. Ε. HUERGO und R. RADICELLA, Suche nach den Isomeren Sr-89'" und Sr-91 m 47 A recent study draws a similar conclusion for the reactions of recoil bromine with bromoethane 21 .

Discovery of yttrium, zirconium, niobium, technetium, and ruthenium isotopes

“…The measured halflife of 3.5(2) min is part of the weighted average of the accepted half-life. only six months earlier [101], however, later their data were found to be incorrect [102].…”

“…In 1931, Aston reported the first observation of stable 99 Ru, 100 Ru, 101 Ru, and 102 Ru in "Constitution of Osmium and Ruthenium" [163]. Ruthenium tetroxide was used in the Cavendish mass spectrograph.…”

“…Tc." This value is currently included as part of the weighted average of the accepted half-life for 101 Zr, 2.3(1) s. Trautmann et al indicatedthat an earlier report of a 3.3(6) s half-life for 101 Zr[57] was misidentified and should be assigned to102 Nb.…”

“…Flegenheimer and Seelmann-Eggebert reported the first observation of102 Tc in the 1954 article "Über einige Isotope des Technetiums"[141]. Chemically separated molybdenum fission fragments were used to chemically extract technetium.The remaining activities were measured with a special fast charge integrator.…”