全文获取类型
收费全文 | 81篇 |
免费 | 0篇 |
国内免费 | 1篇 |
专业分类
化学 | 32篇 |
晶体学 | 6篇 |
力学 | 2篇 |
物理学 | 42篇 |
出版年
2022年 | 5篇 |
2021年 | 4篇 |
2020年 | 3篇 |
2019年 | 1篇 |
2018年 | 4篇 |
2017年 | 5篇 |
2016年 | 9篇 |
2015年 | 3篇 |
2014年 | 3篇 |
2013年 | 3篇 |
2012年 | 6篇 |
2011年 | 4篇 |
2010年 | 6篇 |
2009年 | 3篇 |
2008年 | 2篇 |
2006年 | 2篇 |
2004年 | 3篇 |
2003年 | 2篇 |
2002年 | 3篇 |
2001年 | 3篇 |
2000年 | 3篇 |
1998年 | 1篇 |
1988年 | 1篇 |
1975年 | 1篇 |
1971年 | 1篇 |
1970年 | 1篇 |
排序方式: 共有82条查询结果,搜索用时 0 毫秒
81.
A. P. Serebrov E. A. Kolomenskiy A. N. Pirozhkov I. A. Krasnoshchekova A. V. Vasiliev A. O. Polyushkin M. S. Lasakov A. N. Murashkin V. A. Solovey A. K. Fomin I. V. Shoka O. M. Zherebtsov E. B. Alexandrov S. P. Dmitriev N. A. Dovator P. Geltenbort S. N. Ivanov O. Zimmer 《Physics of Atomic Nuclei》2015,78(14):1601-1605
In this work, the double chamber magnetic resonance spectrometer of the Petersburg Nuclear Physics Institute (PNPI) designed to measure the neutron electric dipole moment (EDM) is briefly described. A method for long storage of polarized ultracold neutrons in a resonance space with a superposed electric field collinear to the leading magnetic field is used. The results of the measurements carried out on the ILL reactor (Grenoble, France) are interpreted as the upper limit of the value of neutron EDM |dn| < 5.5 × 10–26 e cm at the 90% confidence level. 相似文献
82.
Calcium and barium zirconate powders based upon CaZrO3:Eu3+,A and BaZrO3:Eu3+,A (A=Li+, Na+, K+) were prepared by combustion synthesis method and heating to ~1000℃ to improve crystallinity.The structure and morphology of materials were examined by X-ray diffraction (XRD) and scanningelectron microscopy (SEM). XRD results showed that CaZrO3:Eu3+,A and BaZrO3:Eu3+,A (A=Li+, Na+, K+) perovskites possessed orthorhombic and cubic structures, respectively. The morphologies of all powderswere very similar consisting of small, coagulated, cubical particles with narrow size distributions andsmooth and regular surfaces. The characteristic luminescences of Eu3+ ions in CaZrO3:Eu3+,A (A=Li+, Na+, K+) lattices were present with strong emissions at 614 and 625 nm for 5D0→7F2 transitions with other weakeremissions observed at 575, 592, 655, and 701 nm corresponding to 5D0→7Fn transitions (where n=0, 1, 3, 4 respectively). In BaZrO3:Eu3+ both the 5D0→7F1 and 5D0→7F2 transitions at 595 and 613 nm were strong.Photoluminescence intensities of CaZrO3:Eu3+ samples were higher than those of BaZrO3:Eu3+ lattices. Thisremarkable increase of photoluminescence intensity (corresponding to 5D0→7Fn transitions) was observedin CaZrO3:Eu3+ and BaZrO3:Eu3+ if co-doped with Li+ ions. An additional broad band composed of manypeaks between 440 to 575 nm was observed in BaZrO3:Eu3+,,A samples. The intensity of this band wasgreatest in Li+ co-doped samples and lowest for K+ doped samples. 相似文献