Методами рамановской спектроскопии исследованы нанопорошки тантала, а также поверхностные слои массивных образцов тантала кубической и тетрагональной модификации. Показано, что нанопорошки тантала, приготовленные по электрохимической технологии, имеют структуру α-Ta и покрыты слоем аморфного Ta2O5. Степень аморфизации оксидной пленки различна для разных образцов. Установлен вид рамановского спектра β-Ta. Работа выполнена в рамках госконтракта № 02.523.11.3016 от 09.09.2008 между Федеральным агентством по науке и инновациям и ИМЕТ УрО РАН.Tantalum nanopowders and also blankets of massive samples of tantalum of cubic and tetragonal crystalline structures were investigated by methods of Raman spectroscopy. It is shown that tantalum nanopowders, prepared on electrochemical technology have structure α-Ta and are covered by a layer of amorphous Ta2O5. Degree of amorphization of oxide films is various for different samples. The kind of the β-Ta Raman spectrum is established.

The shortage of qualified clinical medical physicists for radiotherapy is typical for some developing countries. A short analysis of medical physicists staffing in Russia is discussed. The quantitative assessment is given. The main proposals and problem-solving are indicated.

The paper gives the situation analysis of radiotherapy in Russia. The concept of scientific planning of longterm radiotherapy development is formulated. The number of the capital equipment and radiotherapy centers is determined. Shortage of medical physicists is underlined. Measures and ways to achieve the radiotherapy level of advanced countries are discussed.

The connection of the basic technological parameters of the spinning process with structural parameters has been established for heat-bonded fibrous materials.

Some features of the attenuation of magnetostatic waves in the ferromagnetic semiconductor HgCr 2 Se 4 are identified. A relationship is established between such attenuation and the heating of magnons by charge carriers

An equation has been obtained for determining the sound-absorption coefficient of fibrous materials as a function of the frequency of the directed sound and of the structural parameters of the sound-absorbing obstacle used.

By the multiple regression analysis method, an estimate has been made of the effect of the basic parameters of needle-punched FMAS on their air permeability.