Study of the weak ?-activities of the volatile fractions of lead-zinc ore by the ?-X coincidence method

Kush, V.; Chepigin, V. I.; Ter-Akop'yan, G.M.; Bogdanov, S. D.

doi:10.1007/bf01153816

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1974

2002

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Cited by 5 publications

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“…demonstrated the existence of technogenic 237 Np in the volatile fraction of a lead-zinc concentrate that had been subjected to chemical processing nor mally used for the separation of osmium. 36 They warned against unjustified conclusions from lowenergy a spectra obtained from such samples because of the possible masking effect of technogenic neptunium.…”

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%