Comment on ‘Cr LVV Auger emission and photoreduction of hexavalent Cr oxides by A.G. Schrott,G.S. Frankel,A.J. Davenport,H.S. Isaacs,C.V. Jahnes and M.A. Russak’

A paper by Schrott et al. [Surf. Sci. 250 (1991) 139] on the Auger Cr LVV spectra of Al/Cr alloys is commented on.The area of major disagreement regards the hypothesis that Al-alloying suppresses the Cr LVV decay. It is pointed out that the surface chemical composition of the alloys should be considered in detail, and that instrumental factors and the presence of surface contamination would account for the negligible Cr LVV intensity.     

Comment on “Foam imbibition in microgravity. An experimental study” by H. Caps,H. Decauwer,M.-L. Chevalier,G. Soyez,M. Ausloos and N. Vandewalle

In a recent paper, [1] described parabolic flight experiments showing the movement of liquid into the foam during the microgravity phase. In this comment, we present a detailed theory of this process, supported by numerical calculations, confirming their conclusion that the wetting front moves with the square root of time. We further show that this diffusion process is similar for different surfactant systems, which allows us to provide bounds on the value of the diffusion coefficient.Received: 28 April 2004, Published online: 3 August 2004PACS: 82.70.Rr Aerosols and foams - 83.80.Iz Emulsions and foams     

俄国物理学家N.G.巴索夫去逝

20 0 1年 7月 1日 ,著名俄国物理学家Ｎ .Ｇ .巴索夫逝世 ,终年 78岁 .巴索夫和美国物理学家汤斯、俄国物理学普罗霍罗夫一起由于发明微波激射器、激光器和从事量子电子学方面的基础研究 ,获得过196 4年诺贝尔物理奖 .巴索夫 192 2年 12月 14日生于莫斯科南面 4 80公里的沃罗涅茨附近的乌斯曼 .194 1年在沃罗涅茨中学毕业 .卫国战争期间他在军队中服役 ,194 3年在基辅军医学校毕业 ,在军队中工作到 194 5年卫国战争胜利 .194 6年到 195 0年 ,在莫斯科机械学院学习 .从 194 8年起 ,巴索夫开始在前苏联科学院列别捷夫物理研究所的振荡实验室工…     

G.I.泰勒和他的影响

乔夫雷·殷格拉姆·泰勒(Geoffrey In-gram Taylor)爵士是本世纪物理学大师之一.他一直从事研究流体力学和固体力学及其在航空学、化学工程、气象学、机械工程、金属物理学和海洋学方面的应用.他的研究方式与众不同,他能透彻地认识自己所考虑到的问题的本质.他常常能设计一些简单但是很实用的实验仪器,并用这些仪器检验和证实他的理论概念.泰勒生于1886年3月7日,在最近召开的庆祝他百岁诞辰的大会(1986年3月24日—28日)上,有人提出了他的工作风格对当代研究工作者是否仍然适用和有价值的问题. 泰勒很喜欢自己独立从事工作,尽量不求助于他…     

Comment on ‘Lifetime broadening in angle-resolved photoemission’ by A.B. McLean,C.E.J. Mitchell and I.G. Hill

In a recent letter [A.B. McLean, C.E.J. Mitchell and I.G. Hill, Surf. Sci. 314 (1994) L925] it was suggested that life-time broadening alone could explain why surface state photoemission line-widths have been observed to increase as the initial states approach the Fermi level. I wish to point out that the used model is unphysical, that the agreement with experimental data is quite fortuitous, and that the experimental observations are satisfactorily understood in terms of established models.     

Femtosecond Laser–Matter Interactions: Theory,Experiments, and Applications,by Eugene G. Gamaly

The Mössbauer effect, the recoilless absorption and emission of gamma rays by nuclei embedded in solids, has its origin in the properties of the solid state. The nature of this connection is dealt with in some detail and the various effects of the crystalline environment on the nuclear energy levels is described. The importance of these effects as contributions to the study of the physical and chemical properties of crystals is discussed, and applications which depend on the intrinsic energy resolution of the effect are described. The recoilless nuclear resonant scattering and diffraction of gamma rays is also dealt with in some detail.     

G.P.汤姆孙对电子衍射的实验研究

介绍了G．P．汤姆孙完成电子衍射实验,证明了德布罗意提出的物质波理论的研究经历从中可以看到注意研究选题的先进性,注重理论的先导作用和科学的研究方法的重要性。