Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Harabati, C."'
Publikováno v:
Phys. Rev. A 96, 012516 (2017)
Nuclei with spin $I \ge 1$ have a weak quadrupole moment which leads to tensor contribution to the parity non-conserving interaction between nuclei and electrons. We calculate this contribution for Yb$^+$, Fr and Ra$^+$ and found it to be small. In c
Externí odkaz:
http://arxiv.org/abs/1704.08809
Publikováno v:
Phys. Rev. A 95, 012503 (2017)
A version of the configuration interaction (CI) method is developed which treats highly excited many-electron basis states perturbatively, so that their inclusion does not affect the size of the CI matrix. This removes, at least in principle, the mai
Externí odkaz:
http://arxiv.org/abs/1611.00425
We calculate the electron recombination rates with target ions W$^{q+}$, $q = 18$ -- $25$, as functions of electron energy and electron temperature (i.e. the rates integrated over the Maxwellian velocity distribution). Comparison with available exper
Externí odkaz:
http://arxiv.org/abs/1608.07932
The strong mixing of many-electron basis states in excited atoms and ions with open $f$ shells results in very large numbers of complex, chaotic eigenstates that cannot be computed to any degree of accuracy. Describing the processes which involve suc
Externí odkaz:
http://arxiv.org/abs/1511.01221
Publikováno v:
Phys. Rev. A 92, 040101 (2015)
We demonstrate that experiments measuring the transition energies of rare-earth ions doped in crystalline lattices are sensitive to violations of Local Lorentz Invariance and Einstein's Equivalence Principle. Using the crystal field of LaCl$_{3}$ as
Externí odkaz:
http://arxiv.org/abs/1503.01511
Publikováno v:
Physical Review A Volume: 90 Issue: 1 Article Number: 014501 (JUL 21 2014)
Effect of the electric quadrupole moment, $Q$, is studied for positron-atom bound systems. It is demonstrated that for $Q >50$ a.u. the electric quadrupole potential is sufficiently strong to bind positron (or electron) even in the absence of the dip
Externí odkaz:
http://arxiv.org/abs/1406.1315
Highly excited eigenstates of atoms and ions with open f shell are chaotic superpositions of thousands, or even millions of Hartree-Fock determinant states. The interaction between dielectronic and multielectronic configurations leads to the broadeni
Externí odkaz:
http://arxiv.org/abs/1311.0585
Publikováno v:
Physical Review A 89, 022517 (2014)
Calculations of the positron binding energies to all atoms in the periodic table are presented and atoms where the positron-atom binding actually exists are identified. The results of these calculations and accurate calculations of other authors (whi
Externí odkaz:
http://arxiv.org/abs/1308.0649
Publikováno v:
Phys. Rev. Lett. 111, 050401 (2013)
We report a joint test of local Lorentz invariance and the Einstein equivalence principle for electrons, using long-term measurements of the transition frequency between two nearly degenerate states of atomic dysprosium. We present many-body calculat
Externí odkaz:
http://arxiv.org/abs/1303.2747
Relativistic coupled-cluster single-double approximation is used to calculate positron-atom bound states. The method is tested on closed-shell atoms such as Be, Mg, Ca, Zn, Cd, and Hg where a number of accurate calculations is available. It is then u
Externí odkaz:
http://arxiv.org/abs/1204.6577