Calculated and measured line intensity ratios of singly and doubly ionized nitrogen atoms in hydrogen plasma

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dc.contributor.authorHey, John Douglasen_ZA
dc.date.accessioned2016-03-21T19:26:44Z
dc.date.available2016-03-21T19:26:44Z
dc.date.issued1970en_ZA
dc.descriptionpage 66 missing.en_ZA
dc.description.abstractThe oscillator strengths of several NII and NIII lines in the optical wavelength region are calculated by means of the Coulomb approximation. Atomic processes in a plasma are discussed, as well as two models (LTE and semi-coronal) which can be used to determine the line intensity ratios of subsequent ionization stages of the same element. Two derivations of line intensity ratio formulae are given, valid under LTE and semi-coronal conditions. Parameters necessary for the evaluation of collisional-radiative coefficients in the semi-coronal model are discussed, and an attempt is made to show that the theoretical values in the literature at present, are inadequate under the laboratory conditions of interest. The lines for which f-values have been calculated are generated in a theta pinch plasma, and an attempt is made to decide which of the two models accounts more accurately for the observed intensity ratios.en_ZA
dc.identifier.apacitationHey, J. D. (1970). <i>Calculated and measured line intensity ratios of singly and doubly ionized nitrogen atoms in hydrogen plasma</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Physics. Retrieved from http://hdl.handle.net/11427/18127en_ZA
dc.identifier.chicagocitationHey, John Douglas. <i>"Calculated and measured line intensity ratios of singly and doubly ionized nitrogen atoms in hydrogen plasma."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Physics, 1970. http://hdl.handle.net/11427/18127en_ZA
dc.identifier.citationHey, J. 1970. Calculated and measured line intensity ratios of singly and doubly ionized nitrogen atoms in hydrogen plasma. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Hey, John Douglas AB - The oscillator strengths of several NII and NIII lines in the optical wavelength region are calculated by means of the Coulomb approximation. Atomic processes in a plasma are discussed, as well as two models (LTE and semi-coronal) which can be used to determine the line intensity ratios of subsequent ionization stages of the same element. Two derivations of line intensity ratio formulae are given, valid under LTE and semi-coronal conditions. Parameters necessary for the evaluation of collisional-radiative coefficients in the semi-coronal model are discussed, and an attempt is made to show that the theoretical values in the literature at present, are inadequate under the laboratory conditions of interest. The lines for which f-values have been calculated are generated in a theta pinch plasma, and an attempt is made to decide which of the two models accounts more accurately for the observed intensity ratios. DA - 1970 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1970 T1 - Calculated and measured line intensity ratios of singly and doubly ionized nitrogen atoms in hydrogen plasma TI - Calculated and measured line intensity ratios of singly and doubly ionized nitrogen atoms in hydrogen plasma UR - http://hdl.handle.net/11427/18127 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18127
dc.identifier.vancouvercitationHey JD. Calculated and measured line intensity ratios of singly and doubly ionized nitrogen atoms in hydrogen plasma. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Physics, 1970 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18127en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Physicsen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherPhysicsen_ZA
dc.titleCalculated and measured line intensity ratios of singly and doubly ionized nitrogen atoms in hydrogen plasmaen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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