Zur kontinuierlichen elektrophoretischen Trennung anorganischer Ionen. II

Meier, Herbert; Zimmerhackl, E.; Albrecht, W.; Bsche, D.; Hecker, W.; Menge, P.; Ruckdeschel, A.; Unger, E.; Zeitler, G.

doi:10.1007/bf01218101

Cited by 6 publications

(1 citation statement)

References 4 publications

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“…also published spectra showing (« activity at 4.3-4.6 MeV, as well as 7 activity at 200-220 keV. 37 These spectra were obtained from chemically separated fractions of osmiridium that came from various places in Africa and Australia. Not all the details of enrichment are given, but earlytreatment of the ore included decomposition with NaOH and NaN0 3 in a silver crucible at 700°C, reduction with a stream of hydrogen, driving off Os and Ru by distillation with HNO3 or H 2 S0 4 / NaBrOj, purification of Ag with NH 4 OH, refluxing for several days with HNO3/HCI, precipitation at pH 7 and reduction of the solution with hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Search for an elusive 4. 4-MeV. cap alpha. emitter in uranium minerals

Dougan¹,

Illige²,

Hulet³

1979

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Introduction 1 Experimental Procedures Source of Materials Preparation and Analysis of the Sample Results and Discussion II Acknowledgments References in THE SEARCH FOR AN ELUSIVE 4.4-MeV a EMITTER IN URANIUM MINERALS ABSTRACTWe describe our search for an unidentified 4.4-MeV a-emitter in Belgian Congo pitchblende and uranium raffinates, and we give a history of observations of 4.4-MeV ac tivity over the last 55 years in radiogenic haloes, zinc ores, monazite, thorite, huttonite, ultrabasic and other abyssal rocks, osiniridium, uranium ores, and raffinates of uranium. We show no evidence of excess 4.4-MeV activity in any of the chemically separated fractions in vestigated. We give upper limits for 4.4-MeV a activity in each of four studied samples.

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Section: Introductionmentioning

confidence: 99%