Clarendon College

Dielectric Properties of Aqueous Ionic Solutions. Parts I and II

The dielectric constants and loss angles of a series of concentrated aqueous ionic solutions have been measured at wave-lengths of 10 cm, 3 cm, and 1.25 cm. From these results t...

Sub-150 °C processed meso-superstructured perovskite solar cells with enhanced efficiency

Fabrication of highly efficient mixed halide perovskite solar cells in an entirely low temperature process (sub-150 °C).

Energy levels in rare-earth ions

The tensor-operator and group-theoretical methods of Racah are used to examine the following contributions to the Hamiltonian of a rare-earth ion: ( a ) the Coulomb interaction ...

An analysis of the absorption spectrum of praseodymium chloride

The terms and levels of the configuration ƒ 2 , corresponding to Pr 3+ , are examined. It is shown that it is essential to allow for the breakdown of Russell─Saunders coupling w...

An analysis of the fluorescence spectrum of europium ethyl sulphate

A theoretical analysis is made of the splittings induced in the levels 7 F 1, 7 F 2, 7 F 3, 7 F 4, 7 F 5, 7 F 6 of the ion Eu3+ by the electric field of the ethyl sulphate latti...

Nuclear Magnetic Resonance and Spin Lattice Equilibrium

E.p.r. and endor of Tb ⁴⁺ in thoria

E.p.r. and endor spectra have been measured in ThO 2 containing Tb 4+ . The crystalline electric field is cubic, and the splittings are very large compared with other S state io...

The matrix elements of tensor operators for configurations of three equivalent electrons

The formulae of Redmond are used to construct expressions for the fractional parentage coefficients relating the configurations l 3 and l 2 . The explicit occurrence of godparen...

The Matrix Elements of Tensor Operators for the Electronic Configurations<i>fⁿ</i>

It is shown that many simple relations exist between various reduced matrix elements of the form (fn WUSL || Uk || fnW'U'SL'), where W = (w1w2w3) and U = (u1u2) are irreducible ...

Nuclear Magnetic Resonance at Low Temperatures