Rovibrational excitation of the hydrogen molecule by low-energy positron impact

The method of Hara using two centre formalism has been employed to investigate positron–hydrogen molecule scattering at low incident energies. Two model potentials have been used to see the importance of the choice of effective potential. It has been found that the total cross sections are sensitive to the details of the effective potential. The present results are in qualitative agreement with measured values and other existing theoretical predictions.

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Publisher’s Note: Measurement of CuK-Shell and AgL-Shell Ionization Cross Sections by Low-Energy Positron Impact [Phys. Rev. Lett.92, 223201 (2004)]

Physical Review Letters ◽

10.1103/physrevlett.92.239902 ◽

2004 ◽

Vol 92 (23) ◽

Cited By ~ 3

Author(s):

Yasuyuki Nagashima ◽

Fuminori Saito ◽

Yoshiko Itoh ◽

Akira Goto ◽

Toshio Hyodo

Keyword(s):

Cross Sections ◽

Low Energy ◽

Positron Impact ◽

Ionization Cross ◽

Ionization Cross Sections ◽

Shell Ionization

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Low energy electron and positron impact differential cross sections for the ionization of water molecules in the coplanar and perpendicular kinematics

The Journal of Chemical Physics ◽

10.1063/1.5088966 ◽

2019 ◽

Vol 150 (5) ◽

pp. 054304

Author(s):

P. Singh ◽

G. Purohit ◽

C. Champion ◽

D. Sébilleau ◽

D. Madison

Keyword(s):

Cross Sections ◽

Differential Cross ◽

Low Energy ◽

Energy Electron ◽

Water Molecules ◽

Differential Cross Sections ◽

Positron Impact ◽

Low Energy Electron ◽

Ionization Of Water

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Ion Desorption from TiO2(110) by Low Energy Positron Impact

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.373.324 ◽

2017 ◽

Vol 373 ◽

pp. 324-327 ◽

Cited By ~ 2

Author(s):

Takayuki Tachibana ◽

Luca Chiari ◽

Masaru Nagira ◽

Takato Hirayama ◽

Yasuyuki Nagashima

Keyword(s):

Positron Annihilation ◽

Electron Impact ◽

Impact Ionization ◽

Low Energy ◽

Surface Ionization ◽

Positron Impact ◽

Ion Desorption ◽

Incident Positron

We have observed positron-stimulated ion desorption from a TiO2(110) surface. H+ and O+ ions were desorbed at incident positron energies above the desorption thresholds for electron impact. However, only O+ ions were detected at energies below those thresholds. These results suggest that by surface ionization positron annihilation as well as by positron impact leads to the O+ ion desorption. By contrast, it is likely that the H+ ions are not desorbed by positron annihilation, but rather by impact ionization.

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