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master's thesis
Mjerenje zaustavne moći za ione vodika MeV-skih energija u dijamantu
Zagreb: University of Zagreb, Faculty of Science, 2022. urn:nbn:hr:217:173607
Matijević, Matija
University of Zagreb
Faculty of Science
Department of Physics

Institutional repository: Repository of the Faculty of Science

Cite this document

Matijević, M. (2022). Mjerenje zaustavne moći za ione vodika MeV-skih energija u dijamantu (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:173607

Matijević, Matija. "Mjerenje zaustavne moći za ione vodika MeV-skih energija u dijamantu." Master's thesis, University of Zagreb, Faculty of Science, 2022. https://urn.nsk.hr/urn:nbn:hr:217:173607

Matijević, Matija. "Mjerenje zaustavne moći za ione vodika MeV-skih energija u dijamantu." Master's thesis, University of Zagreb, Faculty of Science, 2022. https://urn.nsk.hr/urn:nbn:hr:217:173607

Matijević, M. (2022). 'Mjerenje zaustavne moći za ione vodika MeV-skih energija u dijamantu', Master's thesis, University of Zagreb, Faculty of Science, accessed 23 November 2024, https://urn.nsk.hr/urn:nbn:hr:217:173607

Matijević M. Mjerenje zaustavne moći za ione vodika MeV-skih energija u dijamantu [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2022 [cited 2024 November 23] Available at: https://urn.nsk.hr/urn:nbn:hr:217:173607

M. Matijević, "Mjerenje zaustavne moći za ione vodika MeV-skih energija u dijamantu", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:217:173607

Metadata
TitleMjerenje zaustavne moći za ione vodika MeV-skih energija u dijamantu
Title (english)Stopping power measurement for hydrogen ions with MeV energies in diamond
AuthorMatija Matijević
MentorZdravko Siketić (mentor)
MentorPetar Žugec (komentor)
Committee memberPetar Žugec (predsjednik povjerenstva)
Committee memberZdravko Siketić (član povjerenstva)
Committee memberMatko Milin (član povjerenstva)
Committee memberIvica Friščić (član povjerenstva)
Committee memberNils Paar (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Physics)
Zagreb
Defense date and country2022-06-23, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract
Dijamant je poluvodički materijal širokog zabranjenog pojasa i izvrsnih mehaničkih svojstava. Posljednjih godina raste zanimanje za umjetno proizvedenim dijamantima visoke čistoće koji se primjenjuju kao čestični detektori u fizici visokih energija, što u radioterapiji kao dozimetri, a potencijalno i u kvantnim računalima u kojima se istražuje primjena NV (engl. nitrogen vacancy) centara pri izradi kvantnih bitova (engl. qubits). Upravo iz tih razloga veliki se napori ulažu u detaljnu karakterizaciju svojstava dijamanta poput: električne otpornosti, širina zabranjenog pojasa (engl. band gap), mobilnosti nosioca naboja, zaustavne moći, itd. U ovom radu je mjerena zaustavna moć za protonske snopove energija u rasponu od 1.6 do 6 MeV-a koji prolaze kroz tanki kristal sintetičkog dijamanta, realiziran kao samopodržavajuća membrana mikrometarske debljine. Najprije, kako bi se moglo precizno odrediti zaustavnu moć, bilo je potrebno odrediti debljinu same membrane te su za to korištena dvije različite metode: indirektno mjerenjem apsorpcije x-zraka u membrani tzv. PIXE (engl. particle-induced x-ray emission) metodom i direktno iz snimaka ruba membrane dobivenih pretražnom elektronskom mikroskopijom (engl. scanning electron microscopy, SEM). Nakon toga je izmjeren gubitak energije protonskog snopa pri prolasku kroz membranu tzv. STIM (engl. scanning transmission ion microscopy) metodom te je iz dobivenih mjerenja određena zaustavna moć protona MeV-skih energija u dijamantu. Dobiveni rezultati uspoređeni su s vrijednostima zaustavne mo´ci dobivene u Monte Carlo simulacijama unutar SRIM (engl. Stopping and Range of Ions in Matter) programskog paketa i eksperimentalnim rezultatima drugih autora. Naposlijetku, određen je energijski rasap u dijamantu te su rezultati također uspoređeni s vrijednostima dobivenim pomoću SRIM programskog paketa.
Abstract (english)
Diamond is a semiconductor material with a wide band gap and excellent mechanical properties. In the last few years interest for high purity synthetic diamonds is growing due to its various applications ranging from high energy physics (particle detectors), radiotherapy (dosimeters) to quantum computing in which nitrogen vacancy (NV) centers in diamond are being researched as a possible way of creating qubits. For these reasons extensive efforts are being made to characterize the properties of synthetic diamond such as: electrical resistivity, band gap width, mobility of free charge carriers, stopping power, etc. In this work, stopping power for proton beams of energies ranging from 1.6 to 6 MeV pass through a thin crystal of synthetic diamond which is made as a self-supporting membrane of micrometer thickness. Firstly, in order to properly calculate the stopping power, the thickness of the membrane needed to be measured for which two different methods were used: indirectly by measuring the absorption of x-rays in the membrane via the so-called PIXE (particle induced x-ray emission) method and directly from pictures of the membrane’s edge obtained with scanning electron microscopy (SEM). After the membrane thickness was calculated, the energy loss inside the membrane was measured using the so-called STIM (scanning transmission ion microscopy) technique from which the stopping power for MeV protons in diamond was calculated. The stopping power for diamond was calculated and cross referenced with stopping power data obtained by Monte Carlo simulations from SRIM (Stopping and Range of Ions in Matter) and experimental data from other authors. Finally, energy straggling was calculated and cross referenced with values obtained via the SRIM program.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:173607
Study programmeTitle: Physics; specializations in: Research
Course: Research
Study programme type: university
Study level: integrated undergraduate and graduate
Academic / professional title: magistar/magistra fizike (magistar/magistra fizike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-07-01 08:31:03