Індекс рубрикатора НБУВ: В375.6

Рубрики:

Дифузія, самодифузія і внутрішнє тертя (в'язкість) в твердих тілах

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В343.14

Рубрики:

Когерентна оптика. Лазерна оптика, лазерна поляриметрія

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В368.3

Рубрики:

Фізика низьких температур

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В368.3

Рубрики:

Фізика низьких температур

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ 

The recent study of molecular trapped centers in Xe cryocrystals was extended on triatomic self-trapped excitons. Time- and spectrally-resolved molecular luminescence was measured in the temperature range 5 - 60 K. The processes of intrinsic exciton self-rapping into diatomic and triatomic molecular complexes and extrinsic exciton trapping at lattice imperfections were separated by selective photoexcitation of Xe cryocrystals by synchrotron radiation. The temperature dependencies of triplet lifetimes of molecular exciton subbands were measured for the first time.

Індекс рубрикатора НБУВ: В372.314.2

Рубрики:

Екситони. Екситонні рівні

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В375.6

Рубрики:

Дифузія, самодифузія і внутрішнє тертя (в'язкість) в твердих тілах

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ 

Relaxation processes in oxygen-containing Ar cryocrystals pre-irradiated by low-energy electrons are studied with the focus on the role of diffusion controlled atom-atom recombination reaction of oxygen in the relaxation cascades. The results of correlated in real time measurements of thermally stimulated phenomena are presented. The experiments have been performed using activation spectroscopy methods - thermally stimulated exoelectron emission and spectrally resolved thermally stimulated luminescence. Solid evidence of the radiative mechanism of electron detrapping triggering the relaxation cascades is obtained.

Індекс рубрикатора НБУВ: В368.3 + В377.14

Рубрики:

Фізика низьких температур

Фотоелектричні явища

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ 

Spatially separated stable charge centers, self-trapped holes and trapped electrons, were generated in Ar cryocrystals by a low-energy electron beam. A combination of the cathodoluminescence and photon-stimulated exoelectron emission methods was used to monitor center formation and selected relaxation channel - exoelectron emission. It was found that photon-promoted electron current decreased exponentially under irradiation with the laser operating in the visible range. Influence of the laser parameters (power and wavelength) on the characteristic lifetime of exoelectron emission is discussed. Effective bleaching of the low-temperature peaks of thermally stimulated exoelectron emission by the laser light in a visible range was observed.

Thermally-stimulated emission of exoelectrons and photons from solid Xe pre-irradiated by low-energy electrons were studied. A high sensitivity of thermally-stimulated luminescence (TSL) and thermally-stimulated exoelectron emission (TSEE) to sample prehistory was demonstrated. It was shown that electron traps in unannealed samples are characterized by a much broader distribution of trap levels in comparison with annealed samples and their concentration exceeds in number that in annealed samples. Both phenomena, TSL and TSEE, were found to be triggered by release of elections from the same kind of traps. The data obtained suggest a competition between two relaxation channels: charge recombination and electron transport terminated by TSL and TSEE. It was found that TSEE predominates at low temperatures while at higher temperatures TSL prevails. An additional relaxation channel, a photon-stimulated exoelectron emission from pre-irradiated solid Xe, was revealed.

Індекс рубрикатора НБУВ: В367.2

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ 

Correlated real-time measurements of thermally stimulated luminescence and exoelectron emission from solid Xe pre-irradiated with an electron beam were performed. The study enabled us to distinguish between surface and bulk traps in solid Xe and to identify a peak related to electronically induced defects. The activation energy corresponding to annihilation of these defects was estimated by the following methods: the method of different heating rates, the initial-rise method, and the curve cleaning technique with fitting of the thermally stimulated luminescence glow curve.

The processes of energy relaxation in rare gas solids pre-irradiated with an electron beam are discussed. We studied the emission of exoelectrons and photons from RGS. Investigations were performed by a set of activation spectroscopy methods applied simultaneously to each sample. Photon-stimulated exoelectron emission from solid Ne was observed for the first time.

Індекс рубрикатора НБУВ: В345 + В368.3

Рубрики:

Люмінесценція

Фізика низьких температур

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В368.3

Рубрики:

Фізика низьких температур

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В371.236 + В374

Рубрики:

Оптичні властивості твердих тіл. Оптичні властивості кристалів (кристалооптика)

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В379.273.4

Рубрики:

Феримагнетизм. Ферити

Шифр НБУВ: Ж100357 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В369 + В344

Рубрики:

Фізика конденсованих середовищ

Спектроскопія

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В369 + В344

Рубрики:

Фізика конденсованих середовищ

Спектроскопія

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ