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Digitale Medien

Enhancement of radon signals in geophysical studies with the track technique (1990)

Tidjani, A. ; Monnin, M. ; Seidel, J -L.

Springer

Pure and applied geophysics 132 (1990), S. 495-504

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Details

ISSN: 1420-9136

Schlagwort(e): Radon ; S.S.N.T.D. ; geochemical tracer ; fault ; atmospheric parameters ; enhancement technique

Quelle: Springer Online Journal Archives 1860-2000

Thema: Geologie und Paläontologie , Physik

Notizen: Abstract The existence of a suspected geological fault has been confirmed using Solid State Nuclear Track Detectors (SSNTDs) by measuring radon concentration variations in the upper soil above its inferred position. The results obtained prompted us to increase the natural radon signal in the soil, using an additional radon source; this “enhancement technique,” has been experimentally checked with SSNTD detectors.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00876925

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Digitale Medien

Aging phenomena in isotactic polypropylene drawn at different temperatures (1988)

de Candia, F. ; Russo, R. ; Tidjani, A. ; [weitere]

Bognor Regis [u.a.] : Wiley-Blackwell

Journal of Polymer Science Part B: Polymer Physics 26 (1988), S. 1897-1906

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Details

ISSN: 0887-6266

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Physik

Notizen: Fibers of isotactic polypropylene drawn at different temperatures show aging phenomena after drawing. In particular a modulus stiffening is observed at room temperature where the modulus increases with the aging time. In the same time scale the birefringence is constant, while drastic effects on the transport properties are observed. The aging phenomenon can be explained in terms of two mechanisms: a secondary crystallization and/or a densification of the amorphous component.

Zusätzliches Material: 4 Ill.