A MODIFIED ADIABATIC APPROACH TO POSITRON-ATOM AND POSITRON-MOLECULE POLARIZATION POTENTIALS - APPLICATION TO POSITRON-HE SCATTERING

被引：20

作者：

GIBSON, TL

机构：

[1] Department of Physics and Engineering Physics, Texas Tech University, Lubbock, TX, 79409

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1990年 / 23卷 / 04期

关键词：

D O I：

10.1088/0953-4075/23/4/010

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A novel treatment of short-range correlation effects designed for use in calculating positron-atom and positron-molecule polarisation potentials is presented. The treatment is based on a physically motivated approximation that mimics the effect of the dominant non-adiabatic correction to the adiabatic potential at low scattering energies, namely virtual positronium formation. As an initial test of the method, positron-He scattering phaseshifts, scattering length and differential cross sections have been calculated and found to be in good agreement with accurate results. This method is immediately extendible to positron-molecule collisions and does not require significantly more work than a purely adiabatic treatment. © 1990 IOP Publishing Ltd.

引用

页码：767 / 776

页数：10

共 37 条

[11] SIMPLE BASIS SET FOR MOLECULAR WAVEFUNCTIONS CONTAINING FIRST- + SECOND-ROW ATOMS [J].

CLEMENTI, E .

JOURNAL OF CHEMICAL PHYSICS, 1964, 40 (07) :1944-&

[12] THEORY OF LOW-ENERGY POSITRON-HELIUM SCATTERING [J].

DRACHMAN, RJ .

PHYSICAL REVIEW, 1966, 144 (01) :25-&

[13] NON-ADIABATICITY AND OTHER ASPECTS OF POLARIZATION IN POSITRON MOLECULE-SCATTERING [J].

ELZA, BK ;

GIBSON, TL ;

MORRISON, MA ;

SAHA, BC .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1989, 22 (01) :113-130

[14] A PARAMETER-FREE NON-ADIABATIC POLARIZATION POTENTIAL FOR LOW-ENERGY E-H-2 COLLISIONS [J].

GIBSON, TL ;

MORRISON, MA .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1982, 15 (06) :L221-L228

[15] ABINITIO NONADIABATIC POLARIZATION POTENTIALS FOR ELECTRON-MOLECULE SCATTERING - THE E-H-2 SYSTEM [J].

GIBSON, TL ;

MORRISON, MA .

PHYSICAL REVIEW A, 1984, 29 (05) :2497-2508

[16] TOTAL-CROSS-SECTION MEASUREMENTS FOR POSITRONS AND ELECTRONS COLLIDING WITH H-2, N-2, AND CO2 [J].

HOFFMAN, KR ;

DABABNEH, MS ;

HSIEH, YF ;

KAUPPILA, WE ;

POL, V ;

SMART, JH ;

STEIN, TS .

PHYSICAL REVIEW A, 1982, 25 (03) :1393-1403

[17] SCATTERING OF LOW-ENERGY POSITRONS BY HELIUM [J].

HUMBERSTON, JW .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1973, 6 (11) :L305-L308

[18] GAUSSIAN-TYPE FUNCTIONS FOR POLYATOMIC SYSTEMS .I. [J].

HUZINAGA, S .

JOURNAL OF CHEMICAL PHYSICS, 1965, 42 (04) :1293-&

[19] ABINITIO CALCULATIONS OF LOW-ENERGY ELECTRON-SCATTERING BY HCN MOLECULES [J].

JAIN, A ;

NORCROSS, DW .

PHYSICAL REVIEW A, 1985, 32 (01) :134-143

[20] ANGULAR DISTRIBUTION OF ELECTRONS ELASTICALLY SCATTERED BY HELIUM ATOMS AND BY HYDROGEN MOLECULES [J].

KHARE, SP ;

MOISEIWI.BL .

PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON, 1965, 85 (547P) :821-&

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