Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/34992
Full metadata record
DC FieldValueLanguage
dc.contributor.authorTepehan, Galip Gultekin-
dc.date.accessioned2023-04-21T12:39:15Z-
dc.date.available2023-04-21T12:39:15Z-
dc.date.issued1980-
dc.identifier.urihttp://hdl.handle.net/1893/34992-
dc.description.abstractHigher order, S-D and S-F, anticrossing signals induced by a static electric field were investigated to measure the fine structure splittings between magnetic sublevels from S and D and from S and F in the n=4 levelne+ . The excited helium ions were produced by electron bombardment parallel to the magnetic field. The signal centres which are shifted by the electric field were extrapolated to the zero field. Effects of experimental parameters like current, excitation voltage and in particular the pressure were investigated. The following fine structure values were derived from the crossing positions of the signals. Intervals Present Experiment Theory (MH,) Eric (MHZ) (1977) 4F7/2"4Sl/2 31100.7 + 2.4 31103.84 + 0.04 4F5/2_4Sl/2 27438.1 + 3.1 27446.06 + 0.04 4D5/2-4Sl/2 27455.8 + 4.6 27459.02 + 0.04 4D3/2-4Sl/2 20143.2 + 3.9 20143.27 + 0.04 The electric field necessary to induce the signals causes a shift of the crossing centres and so allowed the measurement of the low field Stark effect of this hydrogenic system. The quadratic Stark effect dominates in most cases and the quadratic Stark constants obtained with about 2% accuracy are in agreement with the theoretical calculation based on the diagonalisation of the energy matrix in combined II electric and magnetic fields. A theoretical study was made to calculate the signal shape on the basis of the full fine structure system to derive theoretical values of the crossing entres and Stark constant.en_GB
dc.language.isoenen_GB
dc.publisherUniversity of Stirlingen_GB
dc.titleAnticrossing studies of HE+,n=4en_GB
dc.typeThesis or Dissertationen_GB
dc.type.qualificationlevelDoctoralen_GB
dc.type.qualificationnameDoctor of Philosophyen_GB
Appears in Collections:eTheses from Faculty of Natural Sciences legacy departments

Files in This Item:
File Description SizeFormat 
GGTepehan-Thesis.pdf5.24 MBAdobe PDFView/Open


This item is protected by original copyright



Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

The metadata of the records in the Repository are available under the CC0 public domain dedication: No Rights Reserved https://creativecommons.org/publicdomain/zero/1.0/

If you believe that any material held in STORRE infringes copyright, please contact library@stir.ac.uk providing details and we will remove the Work from public display in STORRE and investigate your claim.