全文获取类型
收费全文 | 66篇 |
免费 | 0篇 |
国内免费 | 1篇 |
专业分类
化学 | 37篇 |
晶体学 | 1篇 |
物理学 | 29篇 |
出版年
2023年 | 1篇 |
2019年 | 2篇 |
2018年 | 1篇 |
2017年 | 3篇 |
2015年 | 3篇 |
2014年 | 2篇 |
2013年 | 1篇 |
2012年 | 10篇 |
2011年 | 9篇 |
2010年 | 3篇 |
2009年 | 6篇 |
2008年 | 1篇 |
2005年 | 2篇 |
2002年 | 1篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1996年 | 2篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1985年 | 3篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1977年 | 2篇 |
1976年 | 3篇 |
1975年 | 1篇 |
1971年 | 1篇 |
排序方式: 共有67条查询结果,搜索用时 15 毫秒
61.
62.
Operation of a nanoparticle counter is based on condensation of water on nanoparticles forming water droplets which are fed to a capacitive type detector. Impaction of a water droplet onto the water filled detector causes formation of a crater resulting in change of capacitance that is measured by associated electronics. Numerical simulation of electric field distribution during droplet impaction has been performed in order to analyze the suitability of the approach and to estimate the magnitude of change of detector capacitance during droplet impaction. A single impinging droplet is able to cause capacitance change in the femtofarad range. 相似文献
63.
Conclusion On the basis of the simple shell-model the anomalously high admixture of the E4-radiation to the M3-transition deexciting the isomeric state84mRb has been explained. The exact evaluation of the amount of this admixture would require, however, detailed theoretical calculations considerating the configuration mixing in the wave functions of the 3+ and 6+ states in84Rb. 相似文献
64.
The measurement of X-rays emitted before the fission of235U induced by resonance neutrons is described. Preliminary results show the dependence of the X-ray yield on fission width
f. It is explained on the bases of the existence of the two-step (n,f) process. The estimate of the width of the (n,f) process is of the order of 4 MeV and the-transitions taking place before fission of236U compound nucleus are mostly of the M1 type.In conclusion the authors would like to express their gratitude to L. B.Pikelner for many useful discussions, to I. M.Salamattn and A.Mateeva for the programme supply of the experiment, V. G.Tisin, A. A.Bogdzel, Yu. I.Kolgin and N.Chikov for taking part in the different steps of the work. The authors are also grateful toYu. P.Popov and I.Wilhelm for taking interest in the work. 相似文献
65.
Summary of the fifth international workshop on slow positron beam techniques for solids and surfaces
66.
A method is described for the preparation and thermal investigation of akaganéite (-FeOOH). Its thermal properties were investigated by means of a derivatograph. The thermal stability was studied during its heating in the air and also in aqueous suspension. At a characteristic temperature the akaganéite is converted to hematite. 相似文献
67.
Bhardwaj V Trabelsi K Singh JB Choi SK Olsen SL Adachi I Adamczyk K Asner DM Aulchenko V Aushev T Aziz T Bakich AM Barberio E Belous K Bhuyan B Bischofberger M Bondar A Bračko M Brodzicka J Browder TE Chen A Chen P Cheon BG Cho K Choi Y Dalseno J Doležal Z Eidelman S Epifanov D Gaur V Gabyshev N Golob B Haba J Hayasaka K Hayashii H Horii Y Hoshi Y Hou WS Hsiung YB Hyun HJ Iijima T Inami K Ishikawa A Iwabuchi M Iwasaki Y Iwashita T Joshi NJ Julius T Kang JH Kawasaki T Kiesling C Kim HO Kim JB 《Physical review letters》2011,107(9):091803
We report a study of B→(J/ψγ)K and B→(ψ'γ)K decay modes using 772×10? B ?B events collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We observe X(3872)→J/ψγ and report the first evidence for χ(c2)→J/ψγ in B→(X_{c ?cγ)K decays, while in a search for X(3872)→ψ'γ no significant signal is found. We measure the branching fractions, B(B(±)→X(3872)K(±))B(X(3872)→J/ψγ)=(1.78(-0.44)(+0.48)±0.12)×10(-6), B(B(±)→χ(c2)K(±))=(1.11(-0.34)(+0.36)±0.09)×10(-5), B(B(±)→X(3872)K(±))B(X(3872)→ψ'γ)<3.45×10? (upper limit at 90% C.L.), and also provide upper limits for other searches. 相似文献