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1

Muon Transfer in Hydrogen Isotopic Mixtures

100%

Czapliński W., Kravtsov A., Mikhailov A., Popov N.

Acta Physica Polonica A

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1998

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vol. 93

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issue 4

617-623

EN

Direct and inverse muon transfer between atomic orbits of muonic hydrogen isotopes is considered in the WKB approximation. The corresponding cross sections, calculated as functions of collision energy, are different above the thresholds for the inverse transfer and approach common limits depending on the principal quantum number and hydrogen isotopes. The comparison of results obtained by integration over impact parameter and by summation over angular momentum is also presented.

2

Lifetime and Collisional Depopulation Cross Section for the 14^{2}D_{3/2} State of Rb

63%

Bieniak B., Głódź M., Grzegorzewski P., Szonert J.

Acta Physica Polonica A

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1994

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vol. 85

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issue 5

813-818

EN

The lifetime τ and the cross section σ for depopulation induced by collisions with ground-state Rb atoms were measured for the 14^{2}D_{3/2} state of Rb. The experiment was performed in the gas-cell conditions in a range of Rb vapour temperatures in the vicinity of 340 K. The lifetime value τ = 1970(130) ns, agrees with the theoretical prediction with allowance for the influence of blackbody radiation as well as of the effects due to core polarizability and spin-orbit interaction. The measured cross section σ = 6.5(3.1) × 10^{-12} cm^{2} is close to the geometrical cross section. This agrees with similar observations made by other authors for the case of the lower n^{2}D states of Rb.

3

Elastic (hμ)_{1s} + He^{++} Scattering and the Influence of Adiabatic Corrections on (Heμh)^{++} Bound States

63%

Gronowski J., Czapliński W., Popov N.

Acta Physica Polonica A

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2004

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vol. 106

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issue 6

795-816

EN

Cross-sections for elastic scattering of muonic hydrogen on helium nuclei, (hμ)_{1s} + He^{++}, where h and He^{++} stands for a hydrogen and a helium isotope nucleus, respectively, were calculated in the one-level adiabatic approximation for a range of collision energies from 0 to 50 eV. Bound states and energy levels of (hμHe)^{++} molecular ions were also calculated and compared with their Born-Oppenheimer counterparts. It is shown that adiabatic corrections are responsible for proper positions of the Ramsauer-Townsend minima in (hμ)_{1s}+He^{++} elastic scattering and, at the same time, they significantly influence bound states and energy levels of (Heμh)^{++} and (Heπh)^{++} ions. Calculations were performed in the frame of the phase-function method.

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1 Szonert J.

Muon Transfer in Hydrogen Isotopic Mixtures

Lifetime and Collisional Depopulation Cross Section for the 14^{2}D_{3/2} State of Rb

Elastic (hμ)_{1s} + He^{++} Scattering and the Influence of Adiabatic Corrections on (Heμh)^{++} Bound States