Authors:
T. Lund Philipps-Universität Kernchemie, FB 14 3550 Marburg FRG

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G. Tress Philipps-Universität Kernchemie, FB 14 3550 Marburg FRG

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E. Khan Philipps-Universität Kernchemie, FB 14 3550 Marburg FRG

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D. Molzahn Philipps-Universität Kernchemie, FB 14 3550 Marburg FRG

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P. Vater Philipps-Universität Kernchemie, FB 14 3550 Marburg FRG

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R. Brandt Philipps-Universität Kernchemie, FB 14 3550 Marburg FRG

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Abstract  

The search for superheavy elements /SHE/ in the carbonaceous chondrite Allende was continued. This time we carried out a thermochromatographic separation at 1050 °C in O2-, resp., H2-gas flow. The volatile fraction /mostly Pb/ was collected on a Pt-foil or trapped in KOH-solution. The heavy element probes were investigated for spontaneous fission activities. We observed zero spontaneous fission decays during 421 days. This yielded an upper limit of 2.9 fission x kg–1 x year–1 /95% confidence limit/. We were unable to confirm the existence of a spontaneous fission activity in the meteorite Allende.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)