全文获取类型
收费全文 | 88篇 |
免费 | 0篇 |
专业分类
化学 | 56篇 |
力学 | 1篇 |
物理学 | 31篇 |
出版年
2022年 | 1篇 |
2021年 | 3篇 |
2013年 | 7篇 |
2012年 | 7篇 |
2011年 | 10篇 |
2010年 | 6篇 |
2009年 | 3篇 |
2008年 | 8篇 |
2007年 | 3篇 |
2006年 | 4篇 |
2005年 | 2篇 |
2004年 | 2篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1999年 | 5篇 |
1998年 | 3篇 |
1996年 | 1篇 |
1994年 | 3篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1987年 | 1篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1978年 | 2篇 |
1977年 | 1篇 |
1976年 | 2篇 |
1974年 | 1篇 |
1967年 | 1篇 |
1930年 | 1篇 |
排序方式: 共有88条查询结果,搜索用时 437 毫秒
1.
B. D. Valnion W. Oelmaier D. Hofer E. Zanotti-Müller G. Graw U. Atzrott F. Hoyler G. Staudt 《Zeitschrift für Physik A Hadrons and Nuclei》1994,350(1):11-12
A search for the recently proposed two-phonon octupole vibrational (2-POV) 4+ or 6+ state in208Pb at an excitation energy of 5683 keV has been performed using the207Pb(d,p),208Pb (p,p) and (,) reactions at high energy resolution. No evidence for a two-phonon excitation at this energy is found.This work was supported in part by the DFG under contract nr. II C4-Gr 894/2-1 and by the DFG-Graduiertenkolleg Struktur der Hadronen und Kerne under contract nr. Mu 705/3-1. 相似文献
2.
E. Robens D. Möhlmann Th. Gast R. Staudt M. Eger 《Journal of Thermal Analysis and Calorimetry》2006,86(1):27-29
The balance is the most widely used complex measuring instrument in
science and techniques. To install a balance on Mars is a challenge for numerous
aspects of in situ measurements in the next decade. By means of a balance
useful parameters could be determined and a variety of investigations could
be carried out there. Possible applications of a balance on Mars are reviewed.
Choice of type and demands on the balance with regard to the conditions on
Mars are discussed. The first step is to test a load cell with strain gauge
deflection sensor. 相似文献
3.
4.
Andreas Hegetschweiler Aljosha-Rakim Jochem Anna Zimmermann Johannes Walter Thorsten Staudt Tobias Kraus 《Particle & Particle Systems Characterization》2021,38(7):2000236
Different colloidal particle characterization methods are examined for their suitability to determine the particle size distribution of particles extracted from steels. Microalloyed steels are dissolved to extract niobium and titanium carbonitride particles that are important for the mechanical properties of these steels. Such particles have sizes ranging from several nanometers to hundreds of nanometers depending on the precipitation stage during the thermomechanically controlled rolling process. The size distribution of the particles is analyzed by dynamic light scattering (DLS), analytical ultracentrifugation (AUC), and hollow fiber flow field-flow fractionation (HF5) and compared to data obtained for reference particles as well as data from electron microscopy, the standard sizing technique used in metallurgy today. AUC and HF5 provide high-quality size distributions, average over large particle numbers that enables statistical analysis, and yield useful insights for alloy design; however, DLS fails due to a lack of resolution. Important aspects in the conversion and comparison of size distributions obtained for broadly distributed particle systems with different measurement principles and the role of surfactants used in sample preparation are discussed. 相似文献
5.
6.
Robens E. Keller J. U. Massen C. H. Staudt R. 《Journal of Thermal Analysis and Calorimetry》1999,55(2):383-387
In sorption measurements, volumetric or gravimetric procedures are commonly used to determine the amount adsorbed. At low
pressures, thermomolecular flow and pressure differences according to Knudsen's law disturb measurements. In volumetry, calibration
of the dead space is required; in gravimetry, the influence of buoyancy has to be taken into account. In both cases, adsorption
of the calibrating gas, usually helium, may disturb the measurements [1]. From the calibration measurements, the density of
the sample can in principle be calculated. However, it has been observed in many experiments that its value depends on the
calibrating gas.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
7.
High-order harmonic generation from muonic atoms exposed to intense laser fields is considered. Our particular interest lies in effects arising from the finite nuclear mass and size. We numerically perform a fully quantum mechanical treatment of the muon-nucleus dynamics by employing modified soft-core and hard-core potentials. It is shown that the position of the high-energy cutoff of the harmonic spectrum depends on the nuclear mass, while the height of the spectral plateau is sensitive to the nuclear radius. We also demonstrate that gamma-ray harmonics can be generated from muonic atoms in ultrastrong VUV fields, which have potential to induce photonuclear reactions. 相似文献
8.
9.
10.
A. Staudt E. Bender K. Muto H. V. Klapdor 《Zeitschrift für Physik A Hadrons and Nuclei》1989,334(1):47-57
Beta decay properties of nuclei far from stability are of decisive importance for the understanding of the element synthesis in the universe and the determination of the age of the universe by means of cosmochronometers. A new large scale microscopic calculation ofβ ?-decay half-lives up to the neutron drip line is presented. This new approach uses the proton-neutron quasiparticle random phase approximation with a Gamow-Teller residual interaction. 相似文献