2026-09-23T10:11:46Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/66240 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Hutchison, Sheldon Butt 2014-12-12T20:55:17Z 2014-12-12T20:55:17Z 10000-01-01 1980 1980 Electron beam excitation of argon/CF(,3)I/NF(,3) gas mixtures produces intense blue-green fluorescence attributed to the heteronuclear interhalogen iodine-monofluoride (IF). Analysis of the observed IF emission spectrum has shown that it is most likely due to E (--->) A('3)(PI)(,1) transitions of this molecule. Fluorescence decay measurements indicate that the I('*)(('4)P) species is the IF('*)(E) precursor, and that the observed fluorescence decay rates are controlled by deactivation of this excited iodine species. Collisional deactivation rate coefficients of I('*)(('4)P) by argon, xenon, CF(,3)I, NF(,3), and UF(,6) were measured and are reported. Mathematical modelling of the IF('*) fluorescence pulse suggests that the effective lifetime of the I('*)(('4)P) species increases with time during the pulse due to radiative trapping of atomic iodine emission. This model also indicates that radiative decay of the Ar(,2)('*) (('1)(SUMM)(,u)('+)) species is directly responsible for I('*)(('4)P) production. Discharge pumped IF('*) laser experiments are also briefly described. Lasing in this system has been achieved on a number of lines between approximately 480 nm and 496 nm for helium/CF(,3)I/NF(,3) gas mixtures. Made available in DSpace on 2014-12-12T20:55:17Z (GMT). No. of bitstreams: 1 8108551.pdf: 1995982 bytes, checksum: 664f05befe5d39b08310aa3cc0712ca2 (MD5) Previous issue date: 1980 Embargo set by: Seth Robbins for item 66419 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 76 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1980. http://hdl.handle.net/2142/66240 (UMI)AAI8108551 eng Engineering, Electronics and Electrical Iodine-Monofluoride (If) Emission Spectrum and Formation Kinetics in Electron Beam Produced Plasmas text Electrical Engineering Electrical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.