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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
energy
Study of the thickness of the dead layer below electrodes, deposited by electroless technique, in CdTe nuclear detectors
IEEE Transactions on Nuclear Science, Volume 53, No. 1, Year 2006
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Description
The semiconductor nuclear detector structure is usually a superposition of several different layers: the metallic electrode, the interface, the depleted zone, the nondepleted one, and finally the second electrode. All inactive layers, and particularly the "dead layer" region below the metallic electrodes, give rise to absorption for photons (X, γ) and to energy loss for charged particles. As a consequence, the detectors measure lower count rates for photons, particularly at low energies, and lower energies for charged particles. The amount of this effect can be only partially attributed to the inactive metallic electrode; the main part has to be attributed to the highly defected zone below the electrode in the interfacial region. This is a structural drawback which needs to be studied to reduce this effect, e.g., by developing new polishing and deposition techniques, or to perform the appropriate corrections. We have measured the thickness of this dead layer for various solution dilution electroless depositions of Pt electrodes on CdTe devices. These measurements were carried out by using collimated (X, γ) rays beams impinging at different angles, especially the grazing ones, and comparing the count rates registered at two selected angles, and by measuring Rutherford backscattering spectra and energy loss of 4He ions. © 2006 IEEE.
Authors & Co-Authors
Zahraman, Khaled
Lebanon, Beirut
National Council for Scientific Research, Beirut
Roumié, Mohamad
Lebanon, Beirut
National Council for Scientific Research, Beirut
Raulo, Adelaide
Italy, Naples
Università Degli Studi Di Napoli Federico Ii
Italy, Naples
Istituto Nazionale Di Fisica Nucleare, Sezione Di Napoli
Auricchio, Natalia
Italy, Rome
Consiglio Nazionale Delle Ricerche
Ayoub, Mohamed
France, Paris
Cnrs Centre National de la Recherche Scientifique
Donati, Ariano
Italy, Rome
Consiglio Nazionale Delle Ricerche
Dusi, Waldes
Italy, Naples
Istituto Nazionale Di Fisica Nucleare, Sezione Di Napoli
Italy, Bologna
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bologna
Hage-Ali, Makram
France, Paris
Cnrs Centre National de la Recherche Scientifique
Lmaï, Fatima
France, Paris
Cnrs Centre National de la Recherche Scientifique
Perillo, Eugenio
Italy, Naples
Università Degli Studi Di Napoli Federico Ii
Italy, Naples
Istituto Nazionale Di Fisica Nucleare, Sezione Di Napoli
Siffert, Paul M.
France, Strasbourg
European Materials Research Society
Sowińska, Malgorzata
France, Chennevières-sur-marne
Eurorad S.a
Ventura, Giulio
Italy, Rome
Consiglio Nazionale Delle Ricerche
Statistics
Citations: 13
Authors: 13
Affiliations: 8
Identifiers
Doi:
10.1109/TNS.2006.869846
ISSN:
00189499
Research Areas
Cancer