Results 301 to 310 of about 2,274,728 (324)

Quantum defects at the critical charge

The Journal of Chemical Physics, 2013
The quantum defect is an empirically introduced notion that has allowed convenient interpolations of spectral data along atomic isoelectronic sequences and their extrapolation with respect to the principal quantum number. Both yield valuable spectral information, the latter providing estimates of low-energy-electron elastic scattering phase shifts as ...
Jacob, Katriel, Gediminas, Gaigalas, Mariusz, Puchalski   +2 more
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Quantum Critical Phenomena in Charged Superconductors

Physical Review Letters, 1988
We study the effect of Coulomb interactions on the onset of superconductivity with increasing intergrain coupling in granular systems at $T=0$. We show that in three dimensions (3D) the onset transition is described by Euclidean scalar electrodynamics, and so can be either first or second order, depending on parameters. A renormalization-group analysis
, Fisher, , Grinstein
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Near critical electrolytes: Are the charge-charge sum rules obeyed?

The Journal of Chemical Physics, 2012
In an electrolyte solution the charge-charge structure factor obeys $S_{ZZ}(k;T,\rho )=0+\xi _{Z,1}^2k^2\break -\xi _{Z,2}^4k^4+\cdots$SZZ(k;T,ρ)=0+ξZ,12k2−ξZ,24k4+⋯ , where ξZ, 1 and ξZ, 2 are the second- and fourth-moment charge-charge correlation lengths depending on the temperature T and the overall ion density ρ. The vanishing of the leading term,
Subir K, Das, Young C, Kim, Michael E, Fisher   +2 more
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Critical Nuclear Charge for Two-Electron Atoms

Physical Review Letters, 2014
The critical nuclear charge Z(c) required to bind a nucleus plus two electrons in a heliumlike atom has recently been an area of active study, resulting in a disagreement with earlier calculations and with the value obtained from the radius of convergence 1/Z* of a 1/Z expansion of the energy.
Estienne, C., Busuttil, M., Moini, A., Drake, G.   +3 more
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Critical charge in quantum electrodynamics

Physics of Atomic Nuclei, 2001
The critical nuclear charge Z cr and the critical distance R cr in the system of two colliding heavy nuclei—they are defined as those at which the ground-state level of the electron spectrum descends to the boundary of the lower continuum, with the result that beyond them (that is, for Z>Z
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Critical charge concepts for CMOS SRAMs

IEEE Transactions on Nuclear Science, 1995
The dramatic effects of external circuit loading on the heavy-ion-induced charge-collection response of a struck transistor are illustrated using three-dimensional mixed-mode simulations. Simulated charge-collection and SEU characteristics of a CMOS SRAM cell indicate that, in some cases, more charge call be collected at sensitive nodes from strikes ...
P.E. Dodd, F.W. Sexton
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