Differential-excitation studies of quasi-one-electron systems. II. Mg II 3<sup>2</sup>P alignment and orientation in Mg<sup>+</sup>-He, Ne, Ar collisions

Andersen, N.; Andersen, T.; Cocke, C. L.; Pedersen, E Horsdal

doi:10.1088/0022-3700/12/15/015

Cited by 29 publications

(13 citation statements)

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“…The analytical solution of this three-state problem can be found in [12]. The parameters 2 and Z determined experimentally in [4,5] are on the other hand derived from the measured scattering amplitudes. By applying the stationary phase approximation to the eikonal formula for the scattering amplitude it has been shown [13,14] that each scattering amplitude factors into two terms, the population amplitude as given in (2) and the square root of the classical cross section for scattering in the potential V(R).…”

Section: A~ (T= Oo)=cm (T= Oo) Exp {-I/h -~ Dt V~(r (T))mentioning

confidence: 99%

“…. This latter potential was used in [4,5] in order to establish the relation between the scattering angle and the impact parameter. The splittings between X 2S, A 2i/, B 222, and 2A are not available as a function of the internuclear distance; only the asymptotic separation between X zN and A 2ii, B aX is known.…”

Section: Physical Modelmentioning

confidence: 99%

“…In addition to this localised radiaI ' coupling at the avoided crossing between Mg § and Mg § + Ar* strong rotational coupling was invoked in [5] between the Z and//-states emerging from Mg § +At. However, it was already shown in [8], that this mechanism would, at least at high energies, yield I Zl =rc/2 for the relative phase Z between the excitation amplitudes of the magnetic substates of Mg +(3p) (see [4] for a definition of the parameters )~, Z). The experiment displays Z~0 over a wide range of impact parameters and collision energies [5].…”

Section: Introductionmentioning

confidence: 98%

“…Furthermore the excitation probability as a function of the impact parameter has been measured over a broad range of energies [4,5]. Finally also the excitation amplitudes of the magnetic sublevels of Mg+(3p) are available both as a function of the impact parameter between b=0.5 and 2.5 a.u.…”

Section: Introductionmentioning

confidence: 99%

“…Finally also the excitation amplitudes of the magnetic sublevels of Mg+(3p) are available both as a function of the impact parameter between b=0.5 and 2.5 a.u. and of the collision energy between 3 and 15 keV [4,5]. Additional information on other inelastic processes in Mg + + Ar collisions comes from the energy analysis of the inelastically scattered Mg+-ions [6].…”

Section: Introductionmentioning

confidence: 99%

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Mg+(3p) excitation in slow Mg+?Ar collisions: Some remarks concerning the mechanism for Mg+(3p) excitation

et al. 1982

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The probability and the amplitudes (2,)~-parameters) for exciting the magnetic sublevels of Mg+(3p) in collisions with Ar-atoms have been computed within the coupledchannel impact parameter approximation. An excitation mechanism is found which accounts for most of the pecularities observed in the energy and impact parameter dependence of the 2,z-parameters for this collision system: the a3sMg + orbital acquires 3d-character at internuclear distances <1.8 a.u. and by strong rotational coupling among the 3d-molecular orbitals in this region primarily the 3dn MO becomes populated. The final distribution among the magnetic sublevels of Mg+(3p) is determined by the rotational coupling at intermediate and large internuclear distances (>3 a.u.) between the cr3p and ~3p magnetic substates of Mg+(3p).

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