Spectroscopy of gold atoms isolated in liquid and solid 4He matrices.
نویسندگان
چکیده
We present a systematic experimental study of absorption and fluorescence spectra of Au atoms in bulk liquid and solid helium matrices. The results are compared to the spectra of Cu atoms studied earlier. We investigate the dependence of the observed spectral lineshapes on the helium pressure. The observed splitting of the 5d(10)6p - 5d(9)6s(2) transitions of Au in hcp solid He gives evidence for an anisotropic trapping site structure formed either by a non-spherical atomic bubble or a four-vacancy center.
منابع مشابه
Green Potentiometric Method for Determination of Triprolidine Hydrochloride and Pseudoephedrine Hydrochloride in their Different Pharmaceutical Matrices using Liquid and Solid Contact Gold Electrodes
Factors affecting the performance of polyvinyl chloride based ion selective electrode such as using different cationic exchangers and ionophores as well as sensor fabrication procedures were recently the scope of study by several researchers. This work presents an environment friendly electro-analytical method for the determination of Triprolidine HCl (TRI) and Pseudoephedrine HCl (PSE). A comp...
متن کاملQuantum Momentum Distributions
In classical systems, the atomic momentum distribution (AMD) is always the renowned Maxwell–Boltzmann distribution.1,2 Essentially, the atomic momentum p = k and atomic position r are independent, canonical variables and the momentum distribution n(k) is always a Gaussian independent of the interatomic or any external potential. Neutron scattering measurements3–10 have shown that n(k) for atoms...
متن کاملSuperfluidity of dense 4He in vycor.
We calculate properties of a model of 4He in Vycor using the path integral Monte Carlo method. We find that 4He forms a distinct layered structure with a highly localized first layer, a disordered second layer with some atoms delocalized and able to give rise to the observed superfluid response, and higher layers of nearly perfect crystals. The addition of a single 3He atom was enough to bring ...
متن کاملBose-Einstein condensation of incommensurate solid 4He.
It is pointed out that the simulation computation of energy performed so far cannot be used to decide if the ground state of solid 4He has the number of lattice sites equal to the number of atoms (commensurate state) or if it is different (incommensurate state). The best variational wave function, a shadow wave function, gives an incommensurate state, but the equilibrium concentration of vacanc...
متن کاملMAGNETIC PROPERTIES OF SOLID 3He WITH 4He IMPURITIES IN A HUBBARD-LIKE MODEL
A Hubbard-like Hamiltonian is used to study exchange-effects in solid 3He when a few 4He atoms are present as impurities. A canonical transformation has been performed to arrive at a Hamiltonian with terms that describe exchange between two 3He atoms, and a 3He atom and a 4He atom. In an attempt to see to what extent the magnetic properties of pure solid 3He remain unaltered, an analog of the L...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- The Journal of chemical physics
دوره 139 10 شماره
صفحات -
تاریخ انتشار 2013