Spin reorientation in Tm2Fe14B

The magnetic structures of Tm₂Fe₁₄B above and below its spin reorientation temperature (approx. 316 K) have been determined from high resolution neutron powder diffraction measurements.Within experimental accuracy all magnetic moments lie in the basal plane at 294 K and along the c-axis at 340 K. The Tm and Fe moments are antiparallel.     

A sufficient condition for continuity of optimal sets in mathematical programming

This paper develops a sufficient condition for continuity (as opposed to upper semicontinuity) of the optimal set of a mathematical program. Applications to the theory of economic choice are discussed.     

Further remarks on a property of the equations of dynamic thermoelasticity

Archive for Rational Mechanics and Analysis -     

Scattering into cones I: Potential scattering

In the non-relativistic time-dependent theory of scattering, we compute the probability that a particle with given initial state should scatter into a cone with apex at the origin. A formula for this probability is found which holds good for a large class of short-range potentials and also for Coulomb potentials. The formula is obtained by showing that if the initial state of a particle is specified byf, then its position probability density at large positive times can be taken to be .The author wishes to acknowledge the support during this work of NSF Grant GP 7453.     

Molecular orbital theory and the assignment of charge transfer transitions

A survey of the present situation in the analysis of charge transfer transitions is given. The possibilities of the combinations of observable characteristics of charge transfer bands such as energy, intensity (including polarisation in a non-cubic system), band shape (including vibrational structure if resolved) and angular momentum properties by deriving molecular eigenvectors and by theoretical elaboration of experimental data of great number of halides and oxides are demonstrated.