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Ultracold homonuclear and heteronuclear collisions in metastable helium

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dc.contributor.authorCocks, Daniel
dc.contributor.authorWhittingham, Ian B.
dc.contributor.authorPeach, Gillian
dc.date.accessioned2020-06-30T23:11:16Z
dc.date.available2020-06-30T23:11:16Z
dc.date.issued2019-06-28
dc.date.updated2020-01-27T16:09:37Z
dc.description.abstractScattering and ionizing cross sections and rates are calculated for ultracold collisions between metastable helium atoms using a fully quantum-mechanical close-coupled formalism. Homonuclear collisions of the bosonic 4He∗+4He∗ and fermionic 3He∗+3He∗ systems, and heteronuclear collisions of the mixed 3He∗+4He∗ system, are investigated over the temperature range 1μK to 1 K. Carefully constructed Born-Oppenheimer molecular potentials are used to describe the electrostatic interaction between the colliding atoms, and complex optical potentials to represent loss through ionization from the 1,3Σ states. Magnetic spin-dipole-mediated transitions from the 5Σ state are included and results reported for spin-polarized and unpolarized systems. Comparisons are made with experimental results, previous semiclassical models, and a perturbed single-channel model.en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn2469-9926en_AU
dc.identifier.urihttp://hdl.handle.net/1885/205666
dc.language.isoen_AUen_AU
dc.provenancehttp://v2.sherpa.ac.uk/id/publication/31304..."Publisher's version can be made open access on institutional repository" from SHERPA/RoMEO site (as at 1/7/20).en_AU
dc.publisherAmerican Physical Societyen_AU
dc.rights© 2019 American Physical Societyen_AU
dc.sourcePhysical Review Aen_AU
dc.titleUltracold homonuclear and heteronuclear collisions in metastable heliumen_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Accessen_AU
local.bibliographicCitation.issue6en_AU
local.bibliographicCitation.lastpage14en_AU
local.bibliographicCitation.startpage1en_AU
local.contributor.affiliationCocks, Daniel, College of Science, ANUen_AU
local.contributor.affiliationWhittingham, Ian B., James Cook Universityen_AU
local.contributor.affiliationPeach, Gillian, University College Londonen_AU
local.contributor.authoruidCocks, Daniel, u1051263en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor020201 - Atomic and Molecular Physicsen_AU
local.identifier.absfor020601 - Degenerate Quantum Gases and Atom Opticsen_AU
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciencesen_AU
local.identifier.ariespublicationu3102795xPUB3575en_AU
local.identifier.citationvolume99en_AU
local.identifier.doi10.1103/PhysRevA.99.062712en_AU
local.identifier.scopusID2-s2.0-85068165363
local.publisher.urlhttps://journals.aps.org/en_AU
local.type.statusPublished Versionen_AU

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