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1.
S. I. Anisimov V. V. Zhakhovskii N. A. Inogamov K. Nishihara A. M. Oparin Yu. V. Petrov 《JETP Letters》2003,77(11):606-610
Molecular-dynamics (MD) simulation of the destruction of a crystal film heated by a femtosecond laser pulse was carried out. Heating is assumed to be instantaneous, because there is no time for the material to be displaced during the pulse. Film destruction is caused by the interaction of unloading waves. It can be considered as a model of a more complex process of splitting out of a thin surface layer from a massive target in the case where the layer remains solid after heating. It was found that the crystal order is broken due to the stretching strains and to the strong anisotropy of residual stress, resulting in a bipartition of the layer separating from the target. The lattice stretching and the formation of anisotropic stresses are due to the expansion of a heated lattice. 相似文献
2.
S. A. Azimov M. L. Allaberdin Kh. Kh. Artykov S. O. Edgorov Sh. V. Inogamov B. B. Levchenko V. D. Lipin S. L. Lutpullaev K. Olimov T. P. Rodionova K. T. Turdaliev A. A. Yuldashev B. S. Yuldashev M. M. Muminov I. Suvanov Z. Trka 《Czechoslovak Journal of Physics》1985,35(9):920-934
Data on the multiplicity, momentum and angular spectra of fastp
n1 GeV/c) neutrons produced in inelastic interactions of protons with neon nuclei and protons at 300 GeV/c are presented. The experimental results obtained for p20Ne interactions are compared with predictions of the additive quark model in which the intranuclear cascading of slow particles is taken into account.We thank V. G. Grishin and R. J. Loveless for valuable discussions. 相似文献
3.
N. A. Inogamov V. V. Zhakhovskii V. A. Khokhlov 《Journal of Experimental and Theoretical Physics》2018,127(1):79-106
Using the gold–water pair as an example, we analyze the problems related to an ultrashort laser action on a metallic target submerged in a transparent liquid. 相似文献
4.
N. A. Inogamov A. Ya. Faenov V. V. Zhakhovskii I. Yu. Skobelev V. A. Khokhlov Y. Kato M. Tanaka T. A. Pikuz M. Kishimoto M. Ishino M. Nishikino Y. Fukuda S. V. Bulanov T. Kawachi Yu. V. Petrov S. I. Anisimov V. E. Fortov 《等离子体物理论文集》2011,51(4):361-366
Laser‐matter interaction is defined by an electronic band structure of condensed matter and frequency ωL of electromagnetic radiation. In the range of moderate fluences, the energy absorbed by electrons from radiation finally thermalizes in the ion thermal energy. The thermalization processes are different for optical as compared with X‐ray quanta and for metals relative to semiconductors and dielectrics, since the light absorption and electron‐electron, electron‐ion dynamics are sensitive to the electron population in a conduction band and the width of a forbidden gap. Although the thermalization processes are different, the final state is simply a heated matter. Laser heating creates powerful stresses in a target if duration of a laser pulse τL is short in acoustic time scale. Nucleation and material removal take place under such stresses. Such way of removal is called here the spallative ablation. Thus the spallative ablation is an ablation mechanism universally important for qualitatively different materials and quanta (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
5.
6.
N. A. Inogamov Yu. V. Petrov S. I. Anisimov A. M. Oparin N. V. Shaposhnikov D. von der Linde J. Meyer-ter-Vehn 《JETP Letters》1999,69(4):310-316
Recent experiments have utilizied high-power subpicosecond laser pulses to effect the ultrafast heating of a condensed material
to temperatures far above the critical temperature. Using optical diagnostics it was established that a complicated density
profile with sharp gradients, differing substantially from an ordinary rarefaction wave, forms in the expanding heated matter.
The present letter is devoted to the analysis of the expansion of matter under the conditions of the experiments reported
by D. von der Linde, K. Sokolowski-Tinten, and J. Bialkowski, Appl. Surf. Science 109/110, 1 (1996); K. Sokolowski-Tinten, J. Bialkowski, A. Cavalleri et al., Proc. Soc. Photo-Opt. Instum. Eng. 3343, 46 (1998); and, K. Sokolowski-Tinten, J. Bialkowski, A. Cavalleri et al., Phys. Rev. Lett. 81, 224 (1998). It is shown that if the unloading adiabat passes through the two-phase region, a thin liquid shell filled with
low-density two-phase matter forms in the expanding material. The shell moves with a constant velocity. The velocity in the
two-phase material is a linear function of the coordinate (flow with uniform deformation), and the density is independent
of the coordinate and decreases with time as t
−1.
Pis’ma Zh. éksp. Teor. Fiz. 69, No. 4, 284–289 (25 February 1999) 相似文献
7.
Zhakhovsky VV Budzevich MM Inogamov NA Oleynik II White CT 《Physical review letters》2011,107(13):135502
By decoupling time and length scales in moving window molecular dynamics shock-wave simulations, a new regime of shock-wave propagation is uncovered characterized by a two-zone elastic-plastic shock-wave structure consisting of a leading elastic front followed by a plastic front, both moving with the same average speed and having a fixed net thickness that can extend to microns. The material in the elastic zone is in a metastable state that supports a pressure that can substantially exceed the critical pressure characteristic of the onset of the well-known split-elastic-plastic, two-wave propagation. The two-zone elastic-plastic wave is a general phenomenon observed in simulations of a broad class of crystalline materials and is within the reach of current experimental techniques. 相似文献
8.
Highly nonlinear free-surface flows in vertical, inclined, and horizontal pipes are analyzed. The problem of bubble motion in a vertical pipe is closely related to the Rayleigh-Taylor instability problem. Inclined pipe flows are intensively studied as related to gas and oil transportation. A new theory of motion of large bubbles in pipes is developed. As distinct from previous approaches, which relied on semiempirical methods or numerical fitting, analytical methods of potential theory and complex analysis are used. A careful comparison of 2D and 3D solutions is presented. It is shown that a higher dimensionality may not correspond to a higher bubble velocity. For the first time, free-surface flows in inclined pipes are analyzed by means of direct numerical simulation, which makes it possible to develop a new approach to the Rayleigh-Taylor instability problem (bubbles with wedge-and cone-shaped noses). 相似文献
9.
Zh. F. Ziyavitdinov U. K. Inogamov N. Zh. Sagdiev Sh. I. Salikhov 《Chemistry of Natural Compounds》1995,31(6):726-730
A method is proposed for isolating the main components (melittin, apamin, and phospholipase A2 from the venom of the bee Apis mellifera using HPLC, and the synthesis of two sorbents for fractionating these peptides is described.A. S. Sadykov Institute of Biooganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (3712) 62 70 71. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 862–866, November-December, 1995. Original article submitted March 13, 1995. 相似文献
10.
N. A. Inogamov S. I. Ashitkov V. V. Zhakhovsky V. V. Shepelev V. A. Khokhlov P. S. Komarov M. B. Agranat S. I. Anisimov V. E. Fortov 《Applied Physics A: Materials Science & Processing》2010,101(1):1-5
Ultrashort laser pulse transfers metal into a two-temperature warm dense matter state and triggers a chain of hydrodynamic
and kinetic processes—melting, expansion, stretching, creation of tensile stress and transition into metastable state. We
study the response of aluminum film deposited on a glass substrate to irradiation by a pump laser pulse transmitted through
glass. Several films with thicknesses from 350 to 1200 nm have been investigated. The smallest thickness is of the order of
the heating depth d
T∼100 nm in Al. The d
T-layer and the free rear side of the film are coupled through pressure waves propagating between them. Therefore, the processes
within d
T-layer affects the time dependent displacement Δ
x
rear(t) of the rear surface. We compare simulated and experimental dependencies Δ
x
rear(t) obtained by the pump–probe technique. It allows us to define a thickness of molten Al layer and explore the two-temperature
processes occurring inside the heated layer. 相似文献