310 citations · 516 across the 13 of their papers we have counts for
13 papers
Opposite effects of the rotational and translational energy on the rates of ion-molecule reactions near : the and reactions
Raphaël Hahn, David Schlander, Valentina Zhelyazkova +1
The ion-molecule reactions and are studied at low collision energies ( from zero to $\sim k_\textrm{B}\cdot 5…
Observation of quantum capture in an ion-molecule reaction
Katharina Höveler, Johannes Deiglmayr, Josef A. Agner +3
In 1954, Vogt and Wannier (Phys. Rev. 95, 1190) predicted that the capture rate of a polarizable neutral atom or molecule by an ion should increase by a factor of two compared to t…
Multipole-moment effects in ion-molecule reactions at low temperatures: part I -- Ion-dipole enhancement of the rate coefficients of the He + NH and He + ND reactions at collision energies near K
Valentina Zhelyazkova, Fernanda B. V. Martins, Josef A. Agner +2
The energy dependence of the rates of the reactions between He and ammonia (NY, Y= {H,D}), forming NY, Y and He as well as NY, Y and He, and the corresponding…
Ion-molecule reactions below 1~K: Observation of a strong enhancement of the reaction rate of the ion-dipole reaction He+ CHF
Valentina Zhelyazkova, Fernanda B. V. Martins, Josef A. Agner +2
The reaction between He and CHF forming predominantly CH and CHF has been studied at collision energies between 0 and ~K in a me…
Fluorescence-lifetime-limited trapping of Rydberg helium atoms on a chip
Valentina Zhelyazkova, Matija Žeško, Hansjürg Schmutz +2
Metastable (1s)(2s) helium atoms produced in a supersonic beam were excited to Rydberg-Stark states (with in the range) in a cryogenic environment and sub…
Preparation of circular Rydberg states in helium with using a modified version of the crossed-fields method
A. A. Morgan, V. Zhelyazkova, S. D. Hogan
Circular Rydberg states with have been prepared in helium using a modified version of the crossed-fields method. This approach to the preparation of high- circular Rydber…
Probing resonant energy transfer in collisions of ammonia with Rydberg helium atoms by microwave spectroscopy
V. Zhelyazkova, S. D. Hogan
We present the results of experiments demonstrating the spectroscopic detection of Förster resonance energy transfer from NH in the ground electronic state to helium…
Electrically tuned Förster resonances in collisions of NH with Rydberg He atoms
V. Zhelyazkova, S. D. Hogan
Effects of weak electric fields on resonant energy transfer between NH in the X A ground electronic state, and Rydberg He atoms in triplet states with principal quantum…
Mean-field energy-level shifts and dielectric properties of strongly polarized Rydberg gases
V. Zhelyazkova, R. Jirschik, S. D. Hogan
Mean-field energy-level shifts arising as a result of strong electrostatic dipole interactions within dilute gases of polarized helium Rydberg atoms have been probed by microwave s…
Preparation of circular Rydberg states in helium using the crossed fields method
V. Zhelyazkova, S. D. Hogan
Helium atoms have been prepared in the circular Rydberg state using the crossed electric and magnetic fields method. The atoms, initially travel…
Rydberg-Stark states in oscillating electric fields
V. Zhelyazkova, S. D. Hogan
Experimental and theoretical studies of the effects of weak radio-frequency electric fields on Rydberg-Stark states with electric dipole moments as large as 10000 D are reported. H…
Probing interactions between Rydberg atoms with large electric dipole moments in amplitude modulated electric fields
V. Zhelyazkova, S. D. Hogan
Dipole-dipole interactions between helium atoms in Rydberg-Stark states with principal quantum number and approximately linear Stark energy shifts, resulting from induced el…
Laser cooling and slowing of CaF molecules
V. Zhelyazkova, A. Cournol, T. E. Wall +5
We demonstrate slowing and longitudinal cooling of a supersonic beam of CaF molecules using counter-propagating laser light resonant with a closed rotational and almost closed vibr…