Analysis of the Frequency Spectra Behavior of Dislocation Ultrasound Absorption in Irradiated LiF Samples with Different Dislocation Structure
| Authors | O.M. Petchenko1 , G.О. Petchenko1 , S.М. Boiko2 |
| Affiliations |
1O.M. Beketov Kharkiv National University of Urban Economy, 17, Marshal Bazhanov Str., 61002 Kharkiv, Ukraine 2M.Ye. Zhukovskiy Kharkiv National Aerospace University, 17, Chkalov Str., 61000 Kharkiv, Ukraine |
| Е-mail | |
| Issue | Volume 10, Year 2018, Number 6 |
| Dates | Received 12 August 2018; published online 18 December 2018 |
| Citation | O.M. Petchenko, G.О. Petchenko, S.М. Boiko, J. Nano- Electron. Phys. 10 No 6, 06010 (2018) |
| DOI | https://doi.org/10.21272/jnep.10(6).06010 |
| PACS Number(s) | 43.35. + d |
| Keywords | Phonon braking, Dislocation decrement, Deformation (8) , Irradiation (10) , Dislocation (9) , Coefficient of dynamic damping, Average effective length of dislocation segment, Elastic modules. |
| Annotation |
The classical work of Stern and Granato studied the frequency spectra of the dislocation absorption of ultrasound Δd(f) for samples of high-purity copper. These authors recorded a non-standard feature in the behavior of the curves Δd(f) in experiments with irradiated crystals – their high-frequency asymptotes are superimposed on one another, which is fundamentally different from those obtained in experiments where similar characteristics are studied under conditions of change in temperature and density of samples' dislocations. In view of the absence of this experimental fact interpretation in special literature and as there were no physical description of dislocation absorption of ultrasound process in irradiated crystals, this paper was intended to analyze the latest studies' results in this area and give an explanation of this particular feature that was observed in the experiment. There are recommendations that can be useful in conducting acoustic exploration of crystals with impurities and pinning centers of magnetic nature. |
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