Weak Limits of the Measures of Maximal Entropy for Orthogonal Polynomials

Potential Analysis - In this paper we study the sequence of orthonormal polynomials {Pn(μ;z)} defined by a Borel probability measure μ with non-polar compact support $S(\mu )\subset...     

Zur Tryptophanreaktion

Ohne Zusammenfassung     

Quantitative Bestimmung des Schwefels durch Wasserstoffsuperoxyd

Ohne Zusammenfassung     

Sn-vacancy defects in GaP

Complex¹¹⁹Sn-vacancy defects in GaP have been studied by Mössbauer-emission spectroscopy on the 24-keV γ radiation of¹¹⁹Sn. The defects were created by ion implantations of radioactive¹¹⁹In⁺ and¹¹⁹Sb⁺, which in their decays both populate the Mössbauer state of¹¹⁹Sn. The radiogenic¹¹⁹Sn-vacancy defects are proposed to consist of substitutional¹¹⁹Sn on Ga or P sites, respectively, associated with (P or Ga) vacancies.     

Geometrical description of binary reactions and large p⊥ phenomena

We study consequences of defining the impact parameter as being the variable conjugate to transverse relative c.m. momentum, p_⊥. This coincides with a proposal originally made by Chang and Raman. The dynamical information carried by these are intimately connected to the behaviour of 90° scattering. In particular, impact parameter dynamics is a priori qualitatively different from direct channel angular momentum dynamics. A phenomenological study of elastic π^±p and pp data at fixed values of longitudinal momentum, p₆, leads to a generalized geometrical scaling hypothesis. In contrast with the power behaviour predicted by parton models, the data suggest exponential behaviour of the scaling amplitudes at fixed p₆ of the type e^Rp⊥ with R ? 1 fm. Correspondingly these amplitudes are described by a pair of complex conjugate singularities on the imaginary axis in the impact parameter plane.     

The (3He,n) reaction in the lower 2s1d shell

The two-proton transfer reaction (³He, n) has been measured on four gas targets, ¹⁶O, ¹⁸O, ²⁰Ne, and ²²Ne, with an incident ³He energy of 18.3 MeV. The data were taken with a neutron time-of-flight spectrometer in the angular range 0° to 40° c.m. The results for selected transitions are compared to DWBA predictions using shell-model spectroscopic amplitudes. In addition, the data for the ¹⁸O(³He, n)²⁰Ne reaction are compared to predictions of the SU(3) strong coupling model.