Výsledky vyhledávání - "Farid El-Daoushy"

Fragmented subfossil Chaoborus mandibles reveal periods of cyprinid presence in lake histories

Autor: Jan-Erik Svensson, Fredrik Palm, Farid El-Daoushy

Publikováno v: Journal of Paleolimnology. 45:101-113

Cyprinid fish have pharyngeal teeth that mash ingested food. Here we show that roach (Rutilus rutilus L.), a common cyprinid in Swedish boreal lakes, often break the mandibles of ingested Chaoborus larvae into smaller fragments. The presence/absence

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4805227e032a59405bf7e4851cbae8e8
https://doi.org/10.1007/s10933-010-9483-8

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Accounting for incomplete charge collection in Monte Carlo simulations of the efficiency of well-type Ge-detectors

Autor: Farid El-Daoushy, Francisco Hernández

Publikováno v: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 498:340-351

The influence of the process of incomplete charge collection on the performance properties of HPGe well-type detectors is studied. A simplified sub-routine, that takes into account the total collection time of charges within the Ge-crystal, has been

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6dee356f2644828631e3c03c3be30558
https://doi.org/10.1016/s0168-9002(02)02080-6

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Photon sources with minimized absorption for the calibration of semiconductor detectors

Autor: Farid El-Daoushy, Francisco Hernández

Publikováno v: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 488:258-261

Homogeneous solid photon-sources for efficiency calibration of HPGe detectors in the energy range 20–60 keV, with minimized self-absorption and improved handling properties, were fabricated and tested as replacement for the most commonly used liqui

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d81aeeaf7ec3e805ae600a6fcccdb5af
https://doi.org/10.1016/s0168-9002(02)00461-8

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Gamma spectrometry of 234Th (238U) in environmental samplesElectronic supplementary information (ESI) available. Additional information regarding the site description and the sampling procedure including one table. See http://www.rsc.org/suppdata/an/b2/b203012h

Autor: Farid El-Daoushy, Francisco Hernández

Publikováno v: The Analyst. 127:981-989

Environmental samples from a wide-range of aquatic and soil deposits, mainly of Scandinavian origin, were analysed for 234Th (238U) using low-level γ-spectrometry. The diversity of the samples, in terms of composition and ages, allowed a detailed ev

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b7fb27ded5ac8d1930c3e7901c553341
https://doi.org/10.1039/b203012h

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Semi-empirical method for self-absorption correction of photons with energies as low as 10keV in environmental samples

Autor: Farid El-Daoushy, Francisco Hernández

Publikováno v: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 484:625-641

A semi-empirical method that allows the correction of photon self-absorption in gamma spectrometry of environmental matrices is presented. Both, photon transmittance and photopeak efficiency are calculated for energies above 10 keV for any given comp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2cdc7aaa49ba3d32a57a73ff17cf00c2
https://doi.org/10.1016/s0168-9002(01)01996-9

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[Untitled]

Autor: Farid El-Daoushy

Publikováno v: Journal of Radioanalytical and Nuclear Chemistry. 250:159-164

238, 239-240Pu were measured in German lake sediment coresby counting after radiochemical separation. Their distribution over the bedof the lake was determined. The lake contain 3 basins and for each basin 3sediment cores have been sliced in two subs

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e6e265df7f348bbc485c6c0d0151855a
https://doi.org/10.1023/a:1013255602204

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A whole-basin study of sediment accumulation using stable lead isotopes and flyash particles in an acidified lake, Sweden

Autor: Ove Emteryd, Ingemar Renberg, Farid El-Daoushy, Maja-Lena Brännvall, Richard Bindler

Publikováno v: Scopus-Elsevier

Using analyses of lead concentrations, lead isotopes ( 206 Pb/ 207 Pb), and spheroidal carbonaceous flyash particles (SCP), we studied sediment accumulation patterns in the acidified lake Harsvatten in southwest Sweden. After determining the natural

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a5fd5c43e73cb5547ebd4a458ac1a78
https://doi.org/10.4319/lo.2001.46.1.0178

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[Untitled]

Autor: J. Dalmasso, E. Haworth, Farid El-Daoushy, Peter G. Appleby, Hervé Michel, G. Ardisson, G. Barci-Funel

Publikováno v: Journal of Radioanalytical and Nuclear Chemistry. 247:107-110

238Pu, 239-240Pu, and 241Am were measured, by α-counting after radiochemical separation, in two lake sediment cores. The profiles of these transuranics were compared to those of the fission product 137Cs. Datation of nuclear events and data on behav

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2930adf406b53838595881fb04c986cc
https://doi.org/10.1023/a:1006719215833

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