Electron and ionic transport in high-radioactive silicate alkali-earth glasses
The paper is devoted to the experimental study of electric transport in a very special substance, namely alkali-earth glasses containing the noticeable quantity (up to 10%) of dissolved irradiated uranium nuclear fuel and its fission and daughter products as well. Such a high-radioactive product...
Збережено в:
| Дата: | 2004 |
|---|---|
| Автор: | |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
2004
|
| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/119017 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Electron and ionic transport in high-radioactive silicate alkali-earth glasses / O. Zhydkov // Condensed Matter Physics. — 2004. — Т. 7, № 4(40). — С. 829–844. — Бібліогр.: 15 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | The paper is devoted to the experimental study of electric transport in a
very special substance, namely alkali-earth glasses containing the noticeable
quantity (up to 10%) of dissolved irradiated uranium nuclear fuel and
its fission and daughter products as well. Such a high-radioactive product
was formed at the active stage of the well-known heavy nuclear accident
which occurred on Chornobyl NPP facility in 1986. The soft matter
behaviour was established by measuring the temperature dependence of
viscosity, where the glassy properties had been identified unambiguously.
Static electric conductivity temperature dependence was measured for
80 K–1000 K temperature interval. The transport processes connected with
thermal activation of electrons, hopping conductivity in the band tails and
variable range hopping (VRH) were identified. The band structure of such
glasses manifests the energy gap of 1.8–2.0 eV width, which formed due
to long-range order and wide band tails connected with horizontal disorder,
which, in its turn, may originate from numerous traps and internal radiation
damages. The latter makes it possible to identify the investigated matter
as devitrified glass. The distinguishing feature of such devitrified glasses
is low ionization energy for electrons, providing a high spatial density of
electron excitations in α -particle tracks, which leads to such a collective
phenomena as the so-called Coulomb explosion. |
|---|