IBIC investigation of radiation-induced effects in CVD and natural diamond

Citation
C. Manfredotti et al., IBIC investigation of radiation-induced effects in CVD and natural diamond, NUCL INST A, 426(1), 1999, pp. 156-163
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
426
Issue
1
Year of publication
1999
Pages
156 - 163
Database
ISI
SICI code
0168-9002(19990421)426:1<156:IIOREI>2.0.ZU;2-F
Abstract
A report is presented concerning the results obtained by Ion Beam-Induced C urrent (IBIC) investigations about the effects of radiation both on CVD and in natural diamond. Proton microbeam itself is used both to irradiate and to "probe" diamond samples particularly in their cross-sections as obtained by cleaving ("lateral IBIC"). Proton fluences and corresponding doses are limited normally to 10(8) p/cm(2) and to 2 Gy, respectively, leaving the po ssibility of an order of magnitude more. While in natural IIa diamond sampl es the charge collection efficiency is homogeneously distributed and it hom ogeneously increases as a function of proton dose, in CVD diamond samples i t is not homogeneously distributed, it reflects the morphology of the sampl es and the main effect of irradiation is both to increase and to spread it over the low collection efficiency regions. Moreover, transient polarisatio n effects leading to lower collection efficiencies are reported both for CV D and diamond samples, in a way that seems to be dependent on the count rat e registered by the "probe" beam. (C) 1999 Elsevier Science B.V. All rights reserved.