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doctoral thesis
Razvoj konvertera za učinkovitu detekciju termalnih neutrona
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. urn:nbn:hr:149:298279
Bernat, Robert
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

Cite this document

Bernat, R. (2021). Razvoj konvertera za učinkovitu detekciju termalnih neutrona (Doctoral thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:298279

Bernat, Robert. "Razvoj konvertera za učinkovitu detekciju termalnih neutrona." Doctoral thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. https://urn.nsk.hr/urn:nbn:hr:149:298279

Bernat, Robert. "Razvoj konvertera za učinkovitu detekciju termalnih neutrona." Doctoral thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. https://urn.nsk.hr/urn:nbn:hr:149:298279

Bernat, R. (2021). 'Razvoj konvertera za učinkovitu detekciju termalnih neutrona', Doctoral thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 11 July 2024, https://urn.nsk.hr/urn:nbn:hr:149:298279

Bernat R. Razvoj konvertera za učinkovitu detekciju termalnih neutrona [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2021 [cited 2024 July 11] Available at: https://urn.nsk.hr/urn:nbn:hr:149:298279

R. Bernat, "Razvoj konvertera za učinkovitu detekciju termalnih neutrona", Doctoral thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:149:298279

Metadata
TitleRazvoj konvertera za učinkovitu detekciju termalnih neutrona
Title (english)Development of converters for efficient detection of thermal neutrons
AuthorRobert Bernat
MentorŠime Ukić (mentor)
MentorIvana Capan (mentor)
Committee memberTomislav Bolanča (predsjednik povjerenstva)
Committee memberVladimir Dananić (član povjerenstva)
Committee memberJasminka Popović (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2021-06-11, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Applied Chemistry
Universal decimal classification
(UDC)		54 - Chemistry. Crystallography. Mineralogy
53 - Physics
621 - Mechanical engineering. Nuclear technology. Machinery
Abstract
Cilj ovog doktorskog rada je razvoj konvertera za učinkovitu detekciju termalnih neutrona. Kao osnovni, aktivni materijal u poluvodičkom detektoru, koristi se širokopojasni 4H-SiC. S obzirom na to da se termalni neutroni ne mogu detektirati direktno s poluvodičkim, čvrstim, detektorom već preko nabijenih čestica koje nastaju interakcijom s drugim jezgrama, potreban je učinkovit konverter. Fokus istraživanja je na izotopima 6Li te 10B, koji u interakciji s termalnim neutronima emitiraju alfa-čestice (6Li(n,α)3H, 10B(n,α)7Li). U okviru istraživanja primijenjeno je nekoliko različitih metoda pripreme tankih filmova. Optimalna debljina tankog sloja filma određena je na temelju Monte Carlo simulacija, a očekivane vrijednosti su u granicama od 1 do 30 μm. Morfologija i struktura dobivenih filmova proučavane su mikroskopskim metodama. Učinkovitost dobivenih konvertera testirana je na nuklearnom reaktoru TRIGA Mark II Instituta Jožef Stefan u Ljubljani, Slovenija. Osim odziva detektora na termalne neutrone, obrađen je i odziv silicijeva karbida na druge izvore ionizirajućeg zračenja kao što su alfa-čestice i gama-zračenje.
Abstract (english)
This thesis deals with development of a converter for efficient detection of thermal neutrons. A wide gap 4H-SiC is used here as a basic, active material in the semiconductor detector. It is not possible to detect thermal neutrons directly with solid semiconductor detector, but through charged particles generated by interaction with other cores. Thus, an efficient converter is needed. The focus of the research is on the isotopes of 6Li and 10B, which interact with the thermal neutrons emitting alpha particles (6Li(n,α)3H, 10B(n,α)7Li). Within the scope of the research, a range of techniques of thin film preparation was used. Optimal thin film thickness was determined using Monte Carlo simulation. The expected values are within the range of 1 to 30 μm. The morphology and structure of the obtained films was studied by means of microscopy methods. Efficiency of the obtained converters was tested on the TRIGA Mark II nuclear reactor of the Jožef Stefan Institute in Ljubljana, Slovenia. In addition to the detector response to thermal neutrons, this thesis covers the response of silicon carbide to other sources of ionizing radiation such as alpha particles and gamma radiation as well.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:298279
Promotion2021
Study programmeTitle: Chemical Engineering and Applied Chemistry - Doctoral course
Study programme type: university
Study level: postgraduate
Academic / professional title: doktor/doktorica znanosti, područje prirodnih znanosti, polje kemija (doktor/doktorica znanosti, područje prirodnih znanosti, polje kemija)
Type of resourceText
Extent102 str. ; 30 cm
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2023-06-02 13:40:41