Interference effects in rotational state distributions: Propensity and inverse propensity
Semiclassical scattering theory has been used to investigate interference effects in rotational state distributions for inelastic atom–diatom collisions. The Δj=even selection rule for homonuclear molecules is seen semiclassically to be an interference effect, and when this symmetry is weakly broken...
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| Veröffentlicht in: | J. Chem. Phys.; (United States) 1977-07, Vol.67 (2), p.463-468 |
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| container_end_page | 468 |
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| container_title | J. Chem. Phys.; (United States) |
| container_volume | 67 |
| creator | McCurdy, Clyde W. Miller, William H. |
| description | Semiclassical scattering theory has been used to investigate interference effects in rotational state distributions for inelastic atom–diatom collisions. The Δj=even selection rule for homonuclear molecules is seen semiclassically to be an interference effect, and when this symmetry is weakly broken—i.e., an ’’almost homonuclear’’ molecule, one for which the odd anisotropy is much smaller than the even anisotropy—the interference persists in the form of a propensity rule, σ (odd Δj) ≪σ (even Δj). If the odd anisotropy is sufficiently large, however, one can see an inversion of the normal propensity, i.e., it can happen that σ (odd Δj) ≳σ (even Δj). It is suggested that rotationally state-selected experiments which resolve this interference structure would be an extremely sensitive measure of the anisotropy in the interaction potential. |
| doi_str_mv | 10.1063/1.434890 |
| format | Article |
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The Δj=even selection rule for homonuclear molecules is seen semiclassically to be an interference effect, and when this symmetry is weakly broken—i.e., an ’’almost homonuclear’’ molecule, one for which the odd anisotropy is much smaller than the even anisotropy—the interference persists in the form of a propensity rule, σ (odd Δj) ≪σ (even Δj). If the odd anisotropy is sufficiently large, however, one can see an inversion of the normal propensity, i.e., it can happen that σ (odd Δj) ≳σ (even Δj). It is suggested that rotationally state-selected experiments which resolve this interference structure would be an extremely sensitive measure of the anisotropy in the interaction potential.</description><identifier>ISSN: 0021-9606</identifier><identifier>EISSN: 1089-7690</identifier><identifier>DOI: 10.1063/1.434890</identifier><language>eng</language><publisher>United States</publisher><subject>640304 - Atomic, Molecular & Chemical Physics- Collision Phenomena ; ATOM COLLISIONS ; ATOM-MOLECULE COLLISIONS ; ATOMIC AND MOLECULAR PHYSICS ; COLLISIONS ; ENERGY LEVELS ; ENERGY-LEVEL TRANSITIONS ; EXCITATION ; EXCITED STATES ; INELASTIC SCATTERING ; INTERATOMIC FORCES ; INTERFERENCE ; KINETICS ; MECHANICS ; MOLECULE COLLISIONS ; QUANTUM MECHANICS ; REACTION KINETICS ; ROTATIONAL STATES ; SCATTERING ; SELECTION RULES ; SEMICLASSICAL APPROXIMATION</subject><ispartof>J. Chem. 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Chem. Phys.; (United States)</title><description>Semiclassical scattering theory has been used to investigate interference effects in rotational state distributions for inelastic atom–diatom collisions. The Δj=even selection rule for homonuclear molecules is seen semiclassically to be an interference effect, and when this symmetry is weakly broken—i.e., an ’’almost homonuclear’’ molecule, one for which the odd anisotropy is much smaller than the even anisotropy—the interference persists in the form of a propensity rule, σ (odd Δj) ≪σ (even Δj). If the odd anisotropy is sufficiently large, however, one can see an inversion of the normal propensity, i.e., it can happen that σ (odd Δj) ≳σ (even Δj). It is suggested that rotationally state-selected experiments which resolve this interference structure would be an extremely sensitive measure of the anisotropy in the interaction potential.</description><subject>640304 - Atomic, Molecular & Chemical Physics- Collision Phenomena</subject><subject>ATOM COLLISIONS</subject><subject>ATOM-MOLECULE COLLISIONS</subject><subject>ATOMIC AND MOLECULAR PHYSICS</subject><subject>COLLISIONS</subject><subject>ENERGY LEVELS</subject><subject>ENERGY-LEVEL TRANSITIONS</subject><subject>EXCITATION</subject><subject>EXCITED STATES</subject><subject>INELASTIC SCATTERING</subject><subject>INTERATOMIC FORCES</subject><subject>INTERFERENCE</subject><subject>KINETICS</subject><subject>MECHANICS</subject><subject>MOLECULE COLLISIONS</subject><subject>QUANTUM MECHANICS</subject><subject>REACTION KINETICS</subject><subject>ROTATIONAL STATES</subject><subject>SCATTERING</subject><subject>SELECTION RULES</subject><subject>SEMICLASSICAL APPROXIMATION</subject><issn>0021-9606</issn><issn>1089-7690</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1977</creationdate><recordtype>article</recordtype><recordid>eNo9UE1LxDAQDaJgXQV_QvDkpeskaZPWmyx-LCzoQQ-eQptMMLKmJYnC_nuzrHiZmfd4M8x7hFwyWDKQ4oYtG9F0PRyRikHX10r2cEwqAM7qXoI8JWcpfQIAU7ypyPs6ZIwOIwaDFJ1DkxP1gcYpD9lPYdjSVCak1qcc_fi9J9MtfYnTjCH5vKNDsGXjB2NCOv_T5-TEDduEF399Qd4e7l9XT_Xm-XG9utvUhnddrtXYSmu71oBTtnxpR8MtylJlywtiqm9H6eQ4GkDFwQwgOBNCOd4aK6xYkKvD3Sllr5PxGc2HmUIoTrTiHBSTRXR9EJk4pRTR6Tn6ryHuNAO9z00zfchN_AIo8mFZ</recordid><startdate>19770715</startdate><enddate>19770715</enddate><creator>McCurdy, Clyde W.</creator><creator>Miller, William H.</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>19770715</creationdate><title>Interference effects in rotational state distributions: Propensity and inverse propensity</title><author>McCurdy, Clyde W. ; Miller, William H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c288t-7b56dd85c0f7d002dbc2de6bc26522db1795b6f6bbc0e720ca0321337f25cd3d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1977</creationdate><topic>640304 - Atomic, Molecular & Chemical Physics- Collision Phenomena</topic><topic>ATOM COLLISIONS</topic><topic>ATOM-MOLECULE COLLISIONS</topic><topic>ATOMIC AND MOLECULAR PHYSICS</topic><topic>COLLISIONS</topic><topic>ENERGY LEVELS</topic><topic>ENERGY-LEVEL TRANSITIONS</topic><topic>EXCITATION</topic><topic>EXCITED STATES</topic><topic>INELASTIC SCATTERING</topic><topic>INTERATOMIC FORCES</topic><topic>INTERFERENCE</topic><topic>KINETICS</topic><topic>MECHANICS</topic><topic>MOLECULE COLLISIONS</topic><topic>QUANTUM MECHANICS</topic><topic>REACTION KINETICS</topic><topic>ROTATIONAL STATES</topic><topic>SCATTERING</topic><topic>SELECTION RULES</topic><topic>SEMICLASSICAL APPROXIMATION</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>McCurdy, Clyde W.</creatorcontrib><creatorcontrib>Miller, William H.</creatorcontrib><creatorcontrib>Department of Chemistry, and Materials and Molecular Research Division of the Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>J. Chem. Phys.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>McCurdy, Clyde W.</au><au>Miller, William H.</au><aucorp>Department of Chemistry, and Materials and Molecular Research Division of the Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Interference effects in rotational state distributions: Propensity and inverse propensity</atitle><jtitle>J. Chem. Phys.; (United States)</jtitle><date>1977-07-15</date><risdate>1977</risdate><volume>67</volume><issue>2</issue><spage>463</spage><epage>468</epage><pages>463-468</pages><issn>0021-9606</issn><eissn>1089-7690</eissn><abstract>Semiclassical scattering theory has been used to investigate interference effects in rotational state distributions for inelastic atom–diatom collisions. The Δj=even selection rule for homonuclear molecules is seen semiclassically to be an interference effect, and when this symmetry is weakly broken—i.e., an ’’almost homonuclear’’ molecule, one for which the odd anisotropy is much smaller than the even anisotropy—the interference persists in the form of a propensity rule, σ (odd Δj) ≪σ (even Δj). If the odd anisotropy is sufficiently large, however, one can see an inversion of the normal propensity, i.e., it can happen that σ (odd Δj) ≳σ (even Δj). It is suggested that rotationally state-selected experiments which resolve this interference structure would be an extremely sensitive measure of the anisotropy in the interaction potential.</abstract><cop>United States</cop><doi>10.1063/1.434890</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | J. Chem. Phys.; (United States), 1977-07, Vol.67 (2), p.463-468 |
| issn | 0021-9606 1089-7690 |
| language | eng |
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| source | AIP Digital Archive |
| subjects | 640304 - Atomic, Molecular & Chemical Physics- Collision Phenomena ATOM COLLISIONS ATOM-MOLECULE COLLISIONS ATOMIC AND MOLECULAR PHYSICS COLLISIONS ENERGY LEVELS ENERGY-LEVEL TRANSITIONS EXCITATION EXCITED STATES INELASTIC SCATTERING INTERATOMIC FORCES INTERFERENCE KINETICS MECHANICS MOLECULE COLLISIONS QUANTUM MECHANICS REACTION KINETICS ROTATIONAL STATES SCATTERING SELECTION RULES SEMICLASSICAL APPROXIMATION |
| title | Interference effects in rotational state distributions: Propensity and inverse propensity |
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