Juan Flegenheimer, Argentine radiochemist of Dutch-Jewish parentage (31 July 1928 –

DESCRIBED NEW ISOTOPES

Hafnium 83 with Gatti 

Molybdenum 105

Technetium 102m

Rhenium 189 with Baró & Viirsoo

Rhenium 190m with Baró

Technetium 102 with Seelmann Eggebert

Technetium 105 with Seelmann Eggebert

Technetium 103 with Geithoff