Title: First use of single-crystal diamonds as fission-fragment detector
Authors: FREGEAU MARC OLIVIEROBERSTEDT StephanBRYS TOMASZGAMBONI ThierryGEERTS WouterHAMBSCH Franz-JosefOBERSTEDT A.VIDALI Marzio
Citation: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT vol. 791 p. 58-64
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2015
JRC N°: JRC94721
ISSN: 0168-9002
URI: http://www.sciencedirect.com/science/article/pii/S0168900215005185
http://publications.jrc.ec.europa.eu/repository/handle/JRC94721
Type: Articles in periodicals and books
Abstract: Single-crystal chemical vapor-deposited diamond (sCVD) was investigated for its ability to act as fission-fragment detector. In particular we investigated timing and energy resolution for application in a simultaneous time-of-flight and energy measurement to determe the mass of the detected fission fragment. Previous tests have shown that poly-crystalline chemical vapor deposited (pCVD) diamonds provide sufficient timing resolution, but their poor energy resolution did not allow complete separation between very low-energy fission fragments, -particles and noise. Our present investigations proof artificial sCVD diamonds to show similar timing resolution as pCVD diamonds close to 100 ps. Improved pulse-height resolution allows the unequivocal separation of fission fragments, and the detection efficiency reaches 100%, but remains with about a few per cent behind requirements for fragment-mass identification. With high-speed digital electronics a timing resolution well below 100 ps is possible. However, the strongly varying quality of the presently available diamond material does not allow application on a sufficiently large scale within reasonable investments.
JRC Directorate:Health, Consumers and Reference Materials

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