Investigation of delayed neutron precursors of As, Sb and Ge

Rapid Chemical Separations

“…A few per cent of the germanium present was also found in the metal mirrors (171,173) . Covolatilized selenium can be recovered in solid calcium sulfate (177) or in water (178) with a yield of ",,2 (177) or 20 per cent (178) in 5 sec.…”

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“…A few per cent of the germanium present was also found in the metal mirrors (171,173) . Covolatilized selenium can be recovered in solid calcium sulfate (177) or in water (178) with a yield of ",,2 (177) or 20 per cent (178) in 5 sec.…”

“…With modified versions, del Marmol & Neve de Mevergnies (171,172) and Tomlinson & Hurdus (173) have directly observed the fission products 2.0sec 85.8 6As and 1.7-sec 1 35Sb. Other groups have decomposed antimony hy dride in liquid absorbents (174)(175)(176) or have produced it by reduction with sodium borohydride (176).…”

Discovery of the arsenic isotopes

“…In 1967 at Mol, Belgium, del Marmol and de Mevergnies were the first to identify 85 As which they reported in Investigation of delayed neutron precursors of As, Sb and Ge [36]. 85 As was produced in thermal neutron fission of 235 U and identified via chemical separation where a neutron activity of 2.14 s was observed.…”