全文获取类型
收费全文 | 117篇 |
免费 | 0篇 |
专业分类
化学 | 53篇 |
力学 | 1篇 |
数学 | 5篇 |
物理学 | 58篇 |
出版年
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2018年 | 2篇 |
2017年 | 1篇 |
2016年 | 3篇 |
2015年 | 3篇 |
2014年 | 2篇 |
2013年 | 6篇 |
2012年 | 8篇 |
2011年 | 2篇 |
2010年 | 7篇 |
2009年 | 5篇 |
2008年 | 12篇 |
2007年 | 10篇 |
2006年 | 4篇 |
2005年 | 6篇 |
2004年 | 2篇 |
2003年 | 3篇 |
2002年 | 5篇 |
2001年 | 4篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 3篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1993年 | 1篇 |
1989年 | 3篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1977年 | 3篇 |
1976年 | 6篇 |
1975年 | 1篇 |
1974年 | 1篇 |
排序方式: 共有117条查询结果,搜索用时 328 毫秒
11.
T. I. Baturina D. R. Islamov J. Bentner C. Strunk M. R. Baklanov A. Satta 《JETP Letters》2004,79(7):337-341
Temperature-and magnetic-field-dependent measurements of the resistance of ultrathin superconducting TiN films are presented. The analysis of the temperature dependence of the zero-field resistance indicates an underlying insulating behavior, when the contribution of Aslamazov-Larkin fluctuations is taken into account. This demonstrates the possibility of the coexistence of the superconducting and insulating phases and of a direct transition from the one to the other. The scaling behavior of magnetic field data is in accordance with a superconductor-insulator transition (SIT) driven by quantum phase fluctuations in two-dimensional superconductor. The temperature dependence of the isomagnetic resistance data on the high-field side of the SIT has been analyzed, and the presence of an insulating phase is confirmed. A transition from the insulating to a metallic phase is found at high magnetic fields, where the zero-temperature asymptotic value of the resistance is equal to h/e2. 相似文献
12.
E. V. Baklanov 《Laser Physics》2008,18(1):22-26
The Brillouin-Wigner perturbation theory is used to precisely calculate the energy levels of hydrogen-like systems. 相似文献
13.
Vidma KV Bogdanchikov GA Baklanov AV Chestakov DA Parker DH 《The Journal of chemical physics》2010,133(19):194306
Van der Waals binding energies for the X-O(2) complexes (X=Xe, CH(3)I, C(3)H(6), C(6)H(12)) are determined by analysis of experimental velocity map imaging data for O((3)P(2)) atoms arising from UV-photodissociation of the complex [A. V. Baklanov et al., J. Chem. Phys. 126, 124316 (2007)]. Several dissociation pathways have been observed, we focus on the channel corresponding to prompt dissociation of X-O(2) into X+2O((3)P) fragments, which is present for complexes of O(2) with all partners X. Our method is based on analysis of the kinetic energy of all three photofragments, where the O atom kinetic energy was directly measured in the experiment and the kinetic energy of the X partner was calculated using momentum conservation, along with the measured angular anisotropy for O atom recoil. We exploit the fact that the clusters are all T-shaped or nearly T-shaped, which we also confirm by ab initio calculations, along with knowledge of the transition dipole governing radiative absorption by the complex. The effect of partitioning the kinetic energy between translation along the X-O(2) and O-O coordinates on the angular anisotropy of the O atom recoil direction is discussed. Van der Waals binding energies of 110±20 cm(-1), 280±20 cm(-1), 135±30 cm(-1), and 585±20 cm(-1) are determined for Xe-O(2), CH(3)I-O(2), C(3)H(6)-O(2), and C(6)H(12)-O(2) clusters, respectively. 相似文献
14.
Far-infrared laser action has been demonstrated in three previously unknown laser media. The substances used were: propargyl fluoride, 15-N cyanogen fluoride, and hydroxylamine. Assignments of the molecular transitions giving rise to the observed laser lines were made for the latter two compounds.New FIR laser lines were also observed with two substances, vinyl chloride and vinyl fluoride, which were already known as laser media by pumping with isotopic CO2 and N2O laser lines.The wavelengths of a total of 26 new FIR laser lines were determined together with the threshold pump power and an indication of the relative line strengths. 相似文献
15.
Ye. V. Baklanov I. M. Beterov V. P. Chebotayev B. Ya. Dubetsky 《Applied physics. B, Lasers and optics》1976,11(1):75-79
The observation of a new type of resonance due to double-quantum transitions in the standing-wave field of a Raman gas laser
is reported. A resonance dip with a width equal to that of the optically forbidden transition was experimentally detected
in the output-vs-timing curve of a Raman Ne laser (λ=1.15 m) upon pumping by radiation of a He−Ne laser at 1.52 m. The theory
presented shows that the resonance arises in the third order of perturbation theory when in resonant SRS the line is inhomogeneously
broadened. The resonance can be considered as resulting from the overlap of dips in the velocity distribution of the nonlinear
polarization induced by the standing laser wave. 相似文献
16.
17.
An experiment is suggested for the precise measurement of the frequency transition 1S–2S of the hydrogen atom with a relative precision of 10-12 based on the use of a narrow resonance of two-photon absorption in a standing wave field. The relative width of the absorption line is determined by the second-order Doppler effect and has the same order as the relative width of Mössbauer transitions with absorption of γ-quanta. The results of this experiment can be included in the system of fundamental constants. A possibility for creating a new standard of the atomic time unit with a reproducibility of ~ 10-15 has been examined. 相似文献
18.
O. N. Prudnikov A. S. Baklanov A. V. Taichenachev A. M. Tumaikin V. I. Yudin 《Journal of Experimental and Theoretical Physics》2013,117(2):222-231
The kinetics of atoms in a bichromatic field is considered. Analytic solutions are obtained for the force, friction coefficient, and diffusion coefficient in the model of a two-level atom without limitations imposed on the intensity of light fields. This effect is observed in the domain of global minima and maxima of the optical potential (i.e., at points where the relative phase of two standing waves is ? = 0, π/2. 相似文献
19.
S. V. Akulinichev S. I. Baklanov Yu. K. Gavrilov V. M. Skorkin 《Bulletin of the Russian Academy of Sciences: Physics》2008,72(7):985-987
The technology of radionuclide production for positron-emission tomography on the proton linac of the Institute for Nuclear Research, Russian Academy of Sciences, is considered. A prototype of a combined target unit for production of positron-emitting radionuclides 11C, 13N, and 18F in the proton linac beam is presented. The production of medical isotopes 103Pd, 124, 125I, and 131Cs is briefly discussed. 相似文献
20.
Eslava S Baklanov MR Kirschhock CE Iacopi F Aldea S Maex K Martens JA 《Langmuir : the ACS journal of surfaces and colloids》2007,23(26):12811-12816
Ellipsometric porosimetry was used to determine the adsorption isotherms of toluene, methanol, and water on b-oriented Silicalite-1 coatings with a thickness of less than ca. 250 nm and to obtain adsorption kinetics. The adsorption isotherms are of sufficient quality to reveal several aspects of the pore structure such as the adsorbate capacity and the adsorbate/framework affinity. The use of a combination of different molecular probes in ellipsometric porosimetry to elucidate the molecular accessibility of Silicalite-1 pores is demonstrated. It is shown that ellipsometric porosimetry is an appropriate technique for probing the influence of aging of the Silicalite-1 coating and of planarization polishing on the porosity, pore accessibility, and adsorbate/framework affinity. 相似文献