Circular polarization of neutron capture γ-rays from Mn,Ni, Ga and W

Capture γ-ray circular polarization measurements on the Mn(n, γ), Ni(n, γ), Ga(n, γ) and W(n, γ) reactions with polarized neutrons resulted in unambiguous spin assignments for 20 levels, 10 of which confirmed previous assignments. For another 20 levels the number of possible spin values has been reduced.     

Double proton transfer and charge-transfer transitions in biological hydrogen-bonded systems guaninecytosine (GC) and GCMg2+ systems

Potential energy curves for intermolecular proton transfer have been calculated within a modified INDO scheme. Analysis of the nature of the excited states, with emphasis on charge-transfer transitions, has been performed. The proton-transfer probability was found to be markedly greater in some excited states than for the ground state. With the metal ions the double proton transfer should be most effective in charge-transfer states.     

Large-PT jet production in QCD

The contribution from qq → qq + X scattering to the large-P_T jet cross section in hadronic collisions is calculated in quantum chromodynamics to order O(g⁶). The result finds a suggestive interpretation in the Parisi-Altarelli parton model, which yields also the general formula, including all quark-gluon subprocesses.     

Solvent effects on the electronic spectra of oxovanadium(IV) β-diketonates comments on the papers of ebraheem et al.

Summary Solvent effects on the electronic absorption spectra of oxovanadium(IV) -diketonates are discussed. It has been found that positions of the long-wave-length bands can be described in terms of the donor-acceptor concept including the donor numbers and the acceptor numbers.

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Lösungsmitteleffekte bei den Elektronenspektren von Oxovanadium(IV)--diketonaten. Kommentar zu den Arbeiten von Ebraheem et al. (Kurze Mitt.)

Zusammenfassung Es werden Lösungsmitteleffekte bei den Elektronenspektren von Oxovanadium(IV)--diketonaten diskutiert. Dabei wurde gefunden, daß die Lage der langwelligen Banden auf Basis eines Donor-Akzeptor-Modells unter Berücksichtigung der Donor- und Akzeptor-Nummern beschrieben werden kann.

     

Theory of sorption of gases on polymers. I. Conformational effects and the double-sigmoid shape of sorption isotherm

The influence of conformational degrees of freedom of a polymer on sorption isotherms is investigated. A simple model of the monomolecular sorption on     

Nucleophilic alkylation and ring transformation in 4-nitroimidazoles

Novel imidazole-oxadiazole ring transformation and oxidative nucleophilic substitution of hydrogen in 4-nitroimidazoles following attack by carbanions are described with suggestions concerning the mechanisms of the reactions.Institute of Organic Chemistry and Technology, Silesian Technical University, Krzywoustego 4, 44-100 Gliwice, Poland. Published in Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 762–767, June, 1998.     

Angular distributions of light charged particles from 252Cf fission in the ranges 0–46° and 134–180°

Alpha particles, tritons, deuterons and protons accompanying ²⁵²Cf fission were registered in coincidence with both fission fragments by means of a system containing two-dimensional position-sensitive silicon detectors. Angular distributions, kinetic energy spectra of light charged particles as well as mass distributions of fission fragments in coincidence with light charged particles were measured. The experimental results are compared with some theoretical models.