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Kronika

Zachara S., Nowina-Konopka M., Kopystyńska A., Sosnowska I., Suffczyński M.

Postępy Fizyki

2002

T. 53, z. 4

215-220

PTF: Poprawiamy statut, Oddział Gdański. Wybory w PAN. Kolejny doktorat honoris causa Andrzeja Hrynkiewicza. Nagrody akceleratorowe. Medal Diraca dla Cisłowskiego. Spotkanie przedstawicieli towarzystw fizycznych. Mniej studentów fizyki we Francji. Kobiety w fizyce. Łączność w zakresie teraherców. Urodziny Abela.

Neutrons in materials science

Sosnowska I.

Electron Technology

1998

Vol. 31, No. 2

139-146

Slow neutrons have been used in materials science for about 50 years. The principal reason for this is that neutrons are neutral particles and penetrate deep into materials. The principal croos-section of the slow neutron scattering is nuclear in origin. In particular, the neutron scattering cross-section for hydrogen is much greater than that for any other element and it also differs from that for deuterium. The neutron is a heavy particle so the changes in itsenergy may be easily measured by the change in its velocity. Both the de Broglie wavelength and the energy of thermal neutrons are matched to the length and energy scales in cindensed matter so not only the statics but also the dynamics of condensed matter may be studied in detail. The neutron possesses also a magnetic moment, which interacts with magnetic moments in solid allowing the details of microscopic magnetism to be examined, both electron and nuclear spins. Neutron scattering has played the principal role in understanding almost every area of modern physics and chemistry of materials. Here the selected applications of the neutron scattering technique in materials science are presented.

Investigation of the crystal and magnetic structures of polycrystalline materials by neutron and synchrotron radiation diffraction

Przeniosło R., Sosnowska I., Fischer P., Wróblewski T., Shiojiri M.

Electron Technology

1998

Vol. 31, No. 2

147-151

We describe we role of neutron and synchrotron radiation (SR) diffraction methods in the investigations of the crystal and magnetic structure of polycrystalline materials. Several examples of neutron and synchrotron radiation diffraction studies are presented. We discuss the structural properties of the following materials: cellular random system with magnetic spin-glass properties and manganite system with long range magnetic ordering at low temperatures.