Attempts in search for superheavy elements in nature II

The search for superheavy elements is continued. We chose minerals for long — time exposure in a sandwich arrangement (PAD[polyallyldiglycol carbonate] and mica). In a first step we investigated samples of mangenese concretions from the Pacific Ocean, enriched samples from Salton Sea and a volatile...

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Bibliographic Details
Published in:Radiation measurements 1999-06, Vol.31 (1), p.563-566
Main Authors: Langrock, E.-J., Vater, P., Brandt, R., Langrock, G., Schumer, F., Schreck, P.
Format: Article
Language:English
Subjects:
crown ether
Earth sciences
Earth, ocean, space
Exact sciences and technology
geochemistry
Geochronology
Isotope geochemistry. Geochronology
mica
PAD
Superheavy elements
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Summary:The search for superheavy elements is continued. We chose minerals for long — time exposure in a sandwich arrangement (PAD[polyallyldiglycol carbonate] and mica). In a first step we investigated samples of mangenese concretions from the Pacific Ocean, enriched samples from Salton Sea and a volatile by product — fraction of copper — shale (Kupferschiefer) from Mansfeld (,,Theisenschlamm“). After an exposure time of 535 days or 326 days, respectively, and proper etching, the SSNTD's were scanned using an optical microscope. Tracks due to the fission fragments could be seen neither at the PAD nor at the mica surface. The most hopeful sample ,,Theisenschlamm“ gives about 1.2 × 10 6 tracks of α — particles at PAD. This can be explained by the uranium content. The exposure will be continued and other samples will be investigated, too.
ISSN:1350-4487
1879-0925
DOI:10.1016/S1350-4487(99)00200-0