Cross sections of exotic light nuclei

Tässä pro gradu-tutkielmassa perehdytään kokeeseen, jossa eksoottisten 6He, 7−9Li, 10−12Be ja 14B ytimien vaikutusaloja 28Si, 181Ta ja 59Co kohtioihin, mitattiin 10–60 AMeV alueella. Tutkimuksen tavoitteena oli kerätä lisää dataa aiemmin havaituista poikkeavuuksista, näiden ytimien kokonaisvaikutusa...

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Main Author: Louko, Jussi
Other Authors: Matemaattis-luonnontieteellinen tiedekunta, Faculty of Sciences, Fysiikan laitos, Department of Physics, Jyväskylän yliopisto, University of Jyväskylä
Format: Master's thesis
Language:eng
Published: 2019
Subjects:
Online Access: https://jyx.jyu.fi/handle/123456789/65773
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author Louko, Jussi
author2 Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics Jyväskylän yliopisto University of Jyväskylä
author_facet Louko, Jussi Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics Jyväskylän yliopisto University of Jyväskylä Louko, Jussi Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics Jyväskylän yliopisto University of Jyväskylä
author_sort Louko, Jussi
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description Tässä pro gradu-tutkielmassa perehdytään kokeeseen, jossa eksoottisten 6He, 7−9Li, 10−12Be ja 14B ytimien vaikutusaloja 28Si, 181Ta ja 59Co kohtioihin, mitattiin 10–60 AMeV alueella. Tutkimuksen tavoitteena oli kerätä lisää dataa aiemmin havaituista poikkeavuuksista, näiden ytimien kokonaisvaikutusaloissa. Erityisesti mielenkiinnon kohteena olivat äkillisesti pienillä energioilla kohoavat vaikutusalat, tietyissä eksoottisissa helium ja litium ytimissä. Nämä poikkeamat ovat oletettavasti ytimien halo- ja klusteri-rakenteiden seurausta. Tuloksia voidaan käyttää tarkempien mikroskooppisten ydinmallien kehittämisessä. Lisäksi niitä on mahdollista hyödyntää uusien ja paremmin säteilyä kestävien puolijohteiden suunnittelussa. Tutkielman pääpainona on käytetty koeasetelma ja analyysimenetelmät. Cross sections for 6 He, 7−9Li, 10−12Be and 14B nuclei on 28Si, 181Ta and 59Co targets were measured at 10 – 60 AMeV energy range using modified transmission method. In total, 120 cross sections were extracted. The purpose of the experiment was to investigate an unexpected behavior of cross sections found in certain exotic nuclei. Especially of interest was a sudden growth, observed in heavy helium and lithium isotopes at low energies. These features are presumably manifestations of a halo and cluster-like structures in these nuclei. Obtained results may yield relevant data for the development of more accurate microscopic nuclear models and radiation resistant electronics. In this work, a detailed description is given of the measuring setup and the methods used in the experiment.
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Tutkimuksen tavoitteena oli ker\u00e4t\u00e4 lis\u00e4\u00e4 dataa aiemmin havaituista\npoikkeavuuksista, n\u00e4iden ytimien kokonaisvaikutusaloissa. Erityisesti mielenkiinnon\nkohteena olivat \u00e4killisesti pienill\u00e4 energioilla kohoavat vaikutusalat, tietyiss\u00e4 eksoottisissa \nhelium ja litium ytimiss\u00e4. N\u00e4m\u00e4 poikkeamat ovat oletettavasti ytimien halo-\nja klusteri-rakenteiden seurausta. Tuloksia voidaan k\u00e4ytt\u00e4\u00e4 tarkempien mikroskooppisten \nydinmallien kehitt\u00e4misess\u00e4. Lis\u00e4ksi niit\u00e4 on mahdollista hy\u00f6dynt\u00e4\u00e4 uusien ja paremmin s\u00e4teily\u00e4 kest\u00e4vien puolijohteiden suunnittelussa. \nTutkielman p\u00e4\u00e4painona on k\u00e4ytetty koeasetelma ja analyysimenetelm\u00e4t.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Cross sections for 6 He, 7\u22129Li, 10\u221212Be and 14B nuclei on 28Si, 181Ta and 59Co targets\nwere measured at 10 \u2013 60 AMeV energy range using modified transmission method.\nIn total, 120 cross sections were extracted. The purpose of the experiment was to\ninvestigate an unexpected behavior of cross sections found in certain exotic nuclei.\nEspecially of interest was a sudden growth, observed in heavy helium and lithium\nisotopes at low energies. These features are presumably manifestations of a halo and\ncluster-like structures in these nuclei. 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spellingShingle Louko, Jussi Cross sections of exotic light nuclei physics nuclear physics exotic nuclei total reaction cross section Soveltava fysiikka Applied Physics 4023
title Cross sections of exotic light nuclei
title_full Cross sections of exotic light nuclei
title_fullStr Cross sections of exotic light nuclei Cross sections of exotic light nuclei
title_full_unstemmed Cross sections of exotic light nuclei Cross sections of exotic light nuclei
title_short Cross sections of exotic light nuclei
title_sort cross sections of exotic light nuclei
title_txtP Cross sections of exotic light nuclei
topic physics nuclear physics exotic nuclei total reaction cross section Soveltava fysiikka Applied Physics 4023
topic_facet 4023 Applied Physics Soveltava fysiikka exotic nuclei nuclear physics physics total reaction cross section
url https://jyx.jyu.fi/handle/123456789/65773 http://www.urn.fi/URN:NBN:fi:jyu-201910084353
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