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1

Cross Sections for l-Mixing of K(n^{2}F) States in Collisions with Ground-State K(4^{2}S) Atoms

100%

Głódź M., Huzandrov A., Klavins J., Sydoryk I., Szonert J., Gateva-Kostova S., Kowalski K.

Acta Physica Polonica A

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2000

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vol. 98

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issue 4

353-361

EN

We report measurements of the cross sections σ_{l-mix} for angular momentum mixing of the K(n^{2}F)(n=6, 7, 8) states with the K(n,l > 3) states, induced in thermal collisions with parent ground state K(4^{2}S) atoms. The experiment was performed in a cell heated to ca. 450K. The n^{2}F states were excited in two steps: 4^{2}S → 4^{2}P → n^{2F} by using a diode laser for the first step (a dipole-transition) and a pulsed dye laser for the second step (a quadrupole-transition). The measured values σ_{l-mix} (6^{2}F)=3.6+-2.2, σ_{l-mix} (7^{2}F)=4.2+-2.6 and σ_{l-mix} (8^{2}F)=8.0+-4.6 (in units of 10^{-13}cm^{-1}) are close to the corresponding values of the geometrical cross sections.

2

Laser Induced Fluorescence of Indium Vapour

63%

Weyh T., Kopystyńska A., Kowalczyk P., Radzewicz C.

Acta Physica Polonica A

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1991

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vol. 80

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issue 6

801-804

EN

Indium vapour was illuminated with laser light in the wavelength range 350-372 nm and at 410.3 nm. A few fluorescence bands of In_{2} as well as a strong background emission of indium-quartz compounds were observed. An evidence of energy transfer processes in indium vapour was found.

3

Shaking during Ion-Atom Collisions

51%

Sharma P., Nandi T.

Acta Physica Polonica A

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2016

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vol. 130

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issue 3

697-700

EN

The shaking (shakeup and shakeoff) processes accompanying ion-atom collisions are studied using non-relativistic hydrogenic wave functions for the K-, L- and M-shell electrons in the sudden approximation limit. The role of recoil amplitude in the shaking processes is discussed. It is found that the suddenness of collision between projectile and target nuclei plays a more definitive factor in the shaking of the respective atomic system than the recoil of nuclei.

4

Theoretical Study of Atomic Excitation by Impact of Protons in the Variational Formalism

51%

El Houda Benmansour N., Bouamoud M., Sahlaoui M.

Acta Physica Polonica A

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2016

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vol. 130

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issue 1

145-146

EN

Schwinger's variational principle is used to evaluate excitation cross-sections of hydrogen atom by proton impact in a range of energies excluding a pertubative treatment. To describe the strong coupling between the excitation and the capture channels that exists at low energies, the continuum states have been introduced in the total wave function. Our results show that these states can describe properly the projectile capture states.

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4 Acta Physica Polonica A

2 2016

1 2000

1 1991

1 Bouamoud M.

1 El Houda Benmansour N.

1 Gateva-Kostova S.

1 Głódź M.

1 Huzandrov A.

1 Klavins J.

1 Kopystyńska A.

1 Kowalczyk P.

1 Kowalski K.

1 Nandi T.

1 Radzewicz C.

1 Sahlaoui M.

1 Sharma P.

1 Sydoryk I.

1 Szonert J.

1 Weyh T.

Cross Sections for l-Mixing of K(n^{2}F) States in Collisions with Ground-State K(4^{2}S) Atoms

Laser Induced Fluorescence of Indium Vapour

Shaking during Ion-Atom Collisions

Theoretical Study of Atomic Excitation by Impact of Protons in the Variational Formalism