Temat: 34.60.+z - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Muon Transfer in Hydrogen Isotopic Mixtures
Autorzy:: Czapliński, W.
Kravtsov, A.
Mikhailov, A.
Popov, N.
Powiązania:: https://bibliotekanauki.pl/articles/1968877.pdf
Data publikacji:: 1998-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 34.60.+z
Opis:: 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.
Źródło:: Acta Physica Polonica A; 1998, 93, 4; 617-623
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Lifetime and Collisional Depopulation Cross Section for the 14$\text{}^{2}$D$\text{}_{3}\text{}_{/}\text{}_{2}$ State of Rb
Autorzy:: Bieniak, B.
Głódź, M.
Grzegorzewski, P.
Szonert, J.
Powiązania:: https://bibliotekanauki.pl/articles/1931304.pdf
Data publikacji:: 1994-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 32.70.Fw
34.60.+z
Opis:: The lifetime τ and the cross section σ for depopulation induced by collisions with ground-state Rb atoms were measured for the 14$\text{}^{2}$D$\text{}_{3}\text{}_{/}\text{}_{2}$ 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$\text{}^{-12}$ cm$\text{}^{2}$ is close to the geometrical cross section. This agrees with similar observations made by other authors for the case of the lower n$\text{}^{2}$D states of Rb.
Źródło:: Acta Physica Polonica A; 1994, 85, 5; 813-818
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Elastic (hμ)$\text{}_{1s}$ + He$\text{}^{++}$ Scattering and the Influence of Adiabatic Corrections on (Heμh)$\text{}^{++}$ Bound States
Autorzy:: Gronowski, J.
Czapliński, W.
Popov, N.
Powiązania:: https://bibliotekanauki.pl/articles/2041542.pdf
Data publikacji:: 2004-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 34.60.+z
36.10.Gv
Opis:: Cross-sections for elastic scattering of muonic hydrogen on helium nuclei, (hμ)$\text{}_{1s}$ + He$\text{}^{++}$, where h and He$\text{}^{++}$ 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)$\text{}^{++}$ 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)$\text{}_{1s}$+He$\text{}^{++}$ elastic scattering and, at the same time, they significantly influence bound states and energy levels of (Heμh)$\text{}^{++}$ and (Heπh)$\text{}^{++}$ ions. Calculations were performed in the frame of the phase-function method.
Źródło:: Acta Physica Polonica A; 2004, 106, 6; 795-816
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Formation of Quasi-Free and Bubble Positronium States in Water and Aqueous Solutions
Autorzy:: Stepanov, S.
Duplâtre, G.
Byakov, V.
Zvezhinskiy, D.
Subrahmanyam, V.
Powiązania:: https://bibliotekanauki.pl/articles/1338623.pdf
Data publikacji:: 2014-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.60.+z
34.80.Lx
82.30.Gg
Opis:: It is shown that in aqueous solutions a positronium atom is first formed in the quasi-free state, and, after 50-100 ps, becomes localized in a nanobubble. Analysis of the annihilation spectra of $NaNO_3$ aqueous solutions shows that the hydrated electron is not involved in the positronium (Ps) formation.
Źródło:: Acta Physica Polonica A; 2014, 125, 3; 770-774
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Positrons and Positronium Atoms in a Condensed Phase Close to Its Melting Point
Autorzy:: Stepanov, S.
Zvezhinskiy, D.
Byakov, V.
Duplâtre, G.
Stepanov, P.
Powiązania:: https://bibliotekanauki.pl/articles/1196038.pdf
Data publikacji:: 2014-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.60.+z
34.80.Lx
78.70.Bj
82.30.Gg
Opis:: Investigation of the local heating effect at the terminal part of a fast positron track sheds light on the accumulation of defects in a frozen medium close to its melting point. Estimations of the formation energies of the structural defects which may trap the Ps atom as well as a contribution of these defects to the enthalpy of fusion are obtained.
Źródło:: Acta Physica Polonica A; 2014, 125, 3; 691-695
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Informacja