B K Elza et al 1989 J. Phys. B: At. Mol. Opt. Phys. 22 113 doi:10.1088/0953-4075/22/1/014
B K Elza, T L Gibson, M A Morrison and B C Saha
Show affiliationsThe authors have investigated various aspects of polarisation/correlation effects at low energies for the prototypical positron-N2 system. First, they have found that, like positron-H2 cross sections, those for this system are highly sensitive to terms in the (adiabatic) polarisation potential that explicitly depend on the sign of the charge of the projectile. Insight into the nature of these sign-dependent distortions is afforded by three-dimensional graphs of polarised N2 density functions. Second, they have explored and characterised nonadiabatic (correlation) effects in this system using a simple two-parameter model, they have found that the onset of these effects in the near-target region in positron scattering is much more gradual than in electron scattering. By including in scattering calculations adiabatic and non-adiabatic effects, they obtain theoretical positron-N2 cross sections in good agreement with recent experimental data.
Issue 1 (14 January 1989)
B K Elza et al 1989 J. Phys. B: At. Mol. Opt. Phys. 22 113
B Verma et al 1980 J. Phys. D: Appl. Phys. 13 1605
R L Rusby et al 1994 Metrologia 31 149
A L Kholmetskii and T Yarman 2007 Eur. J. Phys. 28 1081
T Berer et al 2007 Semicond. Sci. Technol. 22 S137
E Pavarini et al 2003 Supercond. Sci. Technol. 16 147
Yanyi Jiang et al 2005 Metrologia 42 304
N E Andreev et al 1994 Phys. Scr. 49 101
Fritz G Parak 2003 Rep. Prog. Phys. 66 103
N V Bhat and D S Kelkar 1990 J. Phys. D: Appl. Phys. 23 899