Experimental investigation and phase shift analysis of low-energy electron-helium scattering

Andrick, D; Bitsch, A

doi:10.1088/0022-3700/8/3/011

Cited by 170 publications

(36 citation statements)

References 23 publications

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“…There is no evidence from other applications of the swarm technique of any fundamental source of error. On the contrary, there is excellent agreement at energies of a few electron volts between all recent ab initio calculations of the electron-helium momentum transfer cross section, the beam determination of Andrick and Bitsch (1975) and the swarm derivation of Milloy and Crompton (l977b).…”

Section: Discussionmentioning

confidence: 68%

The Momentum Transfer Cross Section for Electrons in Argon in the Energy Range 0 - 4 eV

Milloy¹,

Crompton²,

Rees³

et al. 1977

Aust. J. Phys.

196

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The momentum transfer cross section for electron-argon collisions in the range 0-4 eV has bel(n derived from an analysis of recent measurements of DTIIl as a function of EIN at 294 K (Milloy and Crompton 1977a) and Was a function of EIN at 90 and 293 K (Robertson 1977). Modified effective range theory was used in the fitting procedure at low energies. An investigation of the range of validity of this theory indicated that the scattering length and effective range were uniquely determined ,and hence the cross section could be accurately extrapolated to zero energy.It is concluded that for 8 ,;;; O· 1 e V the error in !he cross section is less than ± 6 % and in the range 0·4 ';;;8 (eV) ,;;; 4-0 the error is less than ± 8 %. In the range 0·1 < 8 (eV) < 0·4 the presence of the minimum makes it difficult to determine the errors in the cross section but it is estimated that they are less than -20 %, + 12 %. It is demonstrated that no other reported cross sections are compatible with the experimental results used in the present derivation.

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Section: Discussionmentioning

confidence: 68%

The Momentum Transfer Cross Section for Electrons in Argon in the Energy Range 0 - 4 eV

Milloy¹,

Crompton²,

Rees³

et al. 1977

Aust. J. Phys.

196

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“…Values of α relevant to this study can be found in Table I. In simple PSA fitting, 16 N (k) = 1, and the scattering function becomes S (k) = exp (2iδ ), where δ are the phase shifts. As shown in Figs.…”

Section: Theoretical Approach (Iam-scar) Fitting and Integratiomentioning

confidence: 99%

Elastic differential cross sections for C4F6 isomers in the 1.5–200 eV energy electron impact: Similarities with six fluorine containing molecules and evidence of F-atom like scattering

Hoshino

Limão‐Vieira

Anzai

et al. 2014

The Journal of Chemical Physics

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We report absolute elastic differential cross sections for electron interactions with the C 4 F 6 isomers, hexafluoro-1,3-butadiene (1,3-C 4 F 6 ), hexafluoro-2-butyne (2-C 4 F 6 ), and hexafluorocyclobutene (c-C 4 F 6 ). The incident electron energy range is 1.5-200 eV, and the scattered electron angular range for the differential measurements varies from 15 • to 150 • . In all cases the absolute scale of the differential cross section was set using the relative flow technique, with helium as the reference species. Atomic-like behaviour in these scattering systems is shown here for the first time, and is further investigated by comparing the elastic cross sections for the C 4 F 6 isomers with other fluorinated molecules, such as SF 6 and C n F 6 (n = 2, 3, and 6). We note that for all the six-F containing molecules, the scattering process for electron energies above 30 eV is indistinguishable. Finally, we report results for calculations of elastic differential cross sections for electron scattering from each of these isomers, within an optical potential method and assuming a screened corrected independent atom representation. The level of agreement between these calculations and our measurements is found to be quite remarkable in all cases.

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“…As shown by Allen (1986), within the WKB approximation, much of this err.or analysis can be done analytically with considerable saving in computational complexity and time. This formalism was employed to show, from the e-He data of Andrick and Bitsch (1975) at 19 eV, that the data imply that the polarisation potential behaves like -cx/r4 for large r, in agreement with the adiabatic polarisation potential. This WKB technique, coupled to the methods of statistical regularisation, was employed by to extract, in a rigorous way, the local potential with error bars for e-He scattering at 19 eV, as shown in Fig.…”

Section: Applications To Electron-atom Scatteringmentioning

confidence: 91%

The Quantum Mechanical Inverse Scattering Problem at Fixed Energy and Some Recent Applications

Allen¹

1991

Aust. J. Phys.

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Much of the information on electronic, atomic, nuclear and particle physics is obtained in scattering experiments. The inverse scattering problem is to deduce the interaction between the colliding particles, or what their constitution is, from the observed data. Inverse scattering techniques at fixed energy which have lent themselves to practical application are reviewed. Some recent applications, in particular to electron-atom scattering, are discussed. New results for e-He scattering at 30 eV are presented.

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Experimental investigation and phase shift analysis of low-energy electron-helium scattering

Cited by 170 publications

References 23 publications

The Momentum Transfer Cross Section for Electrons in Argon in the Energy Range 0 - 4 eV

The Momentum Transfer Cross Section for Electrons in Argon in the Energy Range 0 - 4 eV

Elastic differential cross sections for C4F6 isomers in the 1.5–200 eV energy electron impact: Similarities with six fluorine containing molecules and evidence of F-atom like scattering

The Quantum Mechanical Inverse Scattering Problem at Fixed Energy and Some Recent Applications

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