Application of the Harris expansion method to the elastic s-wave scattering of electrons by hydrogen atoms and by singly ionized helium.

dc.contributor.advisorArmstead, R.L.
dc.contributor.authorHaskell, Hugh Brasher.
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentPhysics and Chemistry
dc.dateDecember 1972
dc.date.accessioned2012-11-13T23:41:57Z
dc.date.available2012-11-13T23:41:57Z
dc.date.issued1972-12
dc.description.abstractThe Harris expansion method is applied to the elastic s-wave scattering of low energy electrons from hydrogen atoms and singly ionized helium atoms. The trial wave functions are Hylleraas functions of 22, 34, 50 and 70 parameters. It is found that reasonably accurate values of e-H phase shifts can be calculated but that e-He phase shifts are substantially less reliable. It is shown that the Harris method gives an accurate depiction of the location, but not the width, of the scattering resonances. Singlet and triplet s-wave phase shifts for e-H and e-He scattering are compared with the results of other calculations and H and He S state energy levels including the auto-ionizing levels are presented and compared with other calculations and with experiment. It is tentatively concluded that the Harris method does not work on systems whose long range potential is of the Coulomb type.
dc.description.distributionstatementApproved for public release; distribution is unlimited.
dc.description.serviceCommander, United States Navy
dc.description.urihttp://archive.org/details/applicationofhar1094515993
dc.identifier.urihttps://hdl.handle.net/10945/15993
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
dc.subject.authorscattering theoryen_US
dc.subject.authoratomic scatteringen_US
dc.subject.authorelectron-hydrogen scatteringen_US
dc.subject.authorelectron-helium ion scatteringen_US
dc.subject.authorHarris expansion methoden_US
dc.subject.authorresonancesen_US
dc.subject.authorscattering resonancesen_US
dc.subject.authorauto-ionization statesen_US
dc.subject.lcshPhysicsen_US
dc.titleApplication of the Harris expansion method to the elastic s-wave scattering of electrons by hydrogen atoms and by singly ionized helium.en_US
dc.typeThesisen_US
dspace.entity.typePublication
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
etd.thesisdegree.levelDoctoralen_US
etd.thesisdegree.namePh.D.en_US
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