Authors:
R. Esterlund FB 14 Philipps-Universität Kernchemie D-3550 Marburg/L (FRG)

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D. Molzahn FB 14 Philipps-Universität Kernchemie D-3550 Marburg/L (FRG)

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R. Brandt FB 14 Philipps-Universität Kernchemie D-3550 Marburg/L (FRG)

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P. Patzelt FB 14 Philipps-Universität Kernchemie D-3550 Marburg/L (FRG)

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P. Vater FB 14 Philipps-Universität Kernchemie D-3550 Marburg/L (FRG)

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A. Boos FB 14 Philipps-Universität Kernchemie D-3550 Marburg/L (FRG)

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M. Chandratillake University of Manchester Manchester (England)

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I. Grant University of Manchester Manchester (England)

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J. Hemingway University of Manchester Manchester (England)

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G. Newton University of Manchester Manchester (England)

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Abstract  

According to calculations of NIX and others, the formation of superheavy elements might occur in heavy-ion reaction systems such as the one under investigation in the present work i.e.,238U+63,65Cu at 9.6 MeV/nucleon. Since previous experiments have indicated that upper limits to the production cross-section for superheavy elements are extremely low, we have carried out two rather long irradiations of 27 hrs and 42 hrs, respectively, at the University of Manchester LINAC. The first run has already been reported on in the literature. In the case of the second run, after chemical separation into HgS, CdS, and La(OH)3 fractions, the samples were assayed simultaneously and continuously over a period of 6 months for alpha-and spontaneous-fission activity, using Si surface-barrier detector. Each sample was at the same time mounted on mice, for the purpose of scanning for fission tracks at a later date. No indications from the data have so far been found that superheavy elements were produced.

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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)