The concurrence of the group of symmetry of the periodic system of elements with the group of dynamical symmetry of a hydrogenlike atom is employed in the theoretical investigation of atoms. The character of the degeneracy of the eigenvalues of a hydrogenlike atom Hamiltonian, without changing its e
Quality evaluation of crystals of mixed oxides of elements of the third group of the periodic system
β Scribed by Dr. P. A. Arsenev; E. I. Kamensky; A. V. Potyemkin
- Publisher
- John Wiley and Sons
- Year
- 1975
- Tongue
- English
- Weight
- 325 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0232-1300
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
Mathematical modelling methods are considered for the evaluation of perspective use of various materials, dielectric crystals as matrices for laser elements of a certain application. Garnet structure crystals and perovskite structure crystals on the basis of mixed oxides of elements of the Third Group of the Periodic System are considered in detail. The determining influence of crystalβchemical aspects on the crystal quality and its further application is defined. On the basis of calculations a certain advantage of perovskite structure crystals (aluminate and scandates of rare earths) of garnets during their application as matrices for active elements of optical quantum generators is deduced. A possibility of creating laser elements on the basis of solid solutions of perovskite structure combinations is emphasized.
π SIMILAR VOLUMES
## Abstract **A closer look**: A deeper theoretical understanding of the multifaceted periodic system of elements (PSE) has been achieved in recent years. The large energy gaps above the noble gas shells 1s^2^ and __n__p^6^ (__n__=2β6) impress periodicity onto the whole PSE, which is complete with
On the existence of periodic solutions for the quasi-linear third order system of O.D.Es In this paper we concern with the nonlinear third order quasi-linear system of ordinary differential equations as: where X β IR n and Ξ is a diagonal matrix. We obtain some simple sufficient conditions for the