標(biāo)題: Titlebook: Electron and Magnetization Densities in Molecules and Crystals; Pierre Becker (Director of the Institute) Book 1980 Springer Science+Busin [打印本頁] 作者: mountebank 時(shí)間: 2025-3-21 19:57
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作者: anagen 時(shí)間: 2025-3-21 20:27
Charge and Spin Densities in Solidsscription orsolids. Following the pioneering work of Thomas (1926) and Fermi (1928), in which the electronic properties of heavy atoms were described by the electron density, two parallel descriptions of electron states have been employed:.(i) Using one-body wave functions ., the Hartree and Hartree作者: 贊成你 時(shí)間: 2025-3-22 04:20 作者: 正式通知 時(shí)間: 2025-3-22 07:35 作者: 付出 時(shí)間: 2025-3-22 09:22 作者: 蜈蚣 時(shí)間: 2025-3-22 15:34 作者: 蜈蚣 時(shí)間: 2025-3-22 19:27
Extinction and Ferroelectric Transition in RbH2PO4as been used to investigate the behaviour of the integrated reflectivity R with temperature. The reflections (200) and (600) have been measured, with a symmetric Laue geometry. The results are given in table 1. The results are reversible as a function of temperature variation.作者: 饒舌的人 時(shí)間: 2025-3-22 22:57 作者: 單純 時(shí)間: 2025-3-23 02:11 作者: abject 時(shí)間: 2025-3-23 07:06 作者: 調(diào)色板 時(shí)間: 2025-3-23 13:14 作者: ESPY 時(shí)間: 2025-3-23 15:21
https://doi.org/10.1057/9781137329493In the present lectures we are concerned with the use of the bound-state solutions of the time-independent Schr?dinger equation.to provide a conceptual and mathematical framework for the analysis and interpretation of the experimentally observed electron densities (charge, spin, and momentum) which are the subject of this Advanced Study Institute.作者: Femine 時(shí)間: 2025-3-23 19:15 作者: 溫和女人 時(shí)間: 2025-3-24 00:04
Linda S. Angell,Calvin S. von BuseckMy intention is only to discuss a few basic concepts that are relevant to the physics of diffraction. There are many excellent books and reviews on this subject (1).作者: 破譯密碼 時(shí)間: 2025-3-24 04:50 作者: 喃喃訴苦 時(shí)間: 2025-3-24 06:33
https://doi.org/10.1007/978-3-7091-3686-7This chapter deals with the specific and well defined task: determining structure factor amplitudes from measurements of Bragg reflections on single crystals using X-ray or neutron radiation. It may however be worthwhile first to discuss in more general terms the optimal conditions for measuring any piece of information.作者: 失誤 時(shí)間: 2025-3-24 11:04
Influence of Trauma and Disease,For an unpolarised neutron beam the diffracted intensities are proportional to the sum of the squares of the structure factors . where F. denotes the nuclear structure factor and . the component of the magnetic structure factor in the plane perpendicular to the scattering vector ..作者: 包庇 時(shí)間: 2025-3-24 18:32 作者: ingrate 時(shí)間: 2025-3-24 20:05
An Electrostatic Description of Chemical BindingThe reasons for our interest in charge-density maps are probably extremely varied. But surely one important reason is the hope of learning something about chemical binding. For this purpose it is useful to think of the chemical bond in electrostatic terms.作者: arbiter 時(shí)間: 2025-3-25 02:41
Diffraction by Real Crystals: I. Kinematical Theory and Time AveragingMy intention is only to discuss a few basic concepts that are relevant to the physics of diffraction. There are many excellent books and reviews on this subject (1).作者: peak-flow 時(shí)間: 2025-3-25 05:58 作者: aerobic 時(shí)間: 2025-3-25 08:19
Optimal Experimental Conditions for Charge Density DeterminationThis chapter deals with the specific and well defined task: determining structure factor amplitudes from measurements of Bragg reflections on single crystals using X-ray or neutron radiation. It may however be worthwhile first to discuss in more general terms the optimal conditions for measuring any piece of information.作者: SCORE 時(shí)間: 2025-3-25 15:35 作者: inflame 時(shí)間: 2025-3-25 15:56
https://doi.org/10.1007/978-1-4684-1018-1Fourier transform; crystal; development; diffraction; energy; hydrogen; information; molecule; research; reso作者: TATE 時(shí)間: 2025-3-25 20:56
Entropy reduction in mathematical giftednessas been used to investigate the behaviour of the integrated reflectivity R with temperature. The reflections (200) and (600) have been measured, with a symmetric Laue geometry. The results are given in table 1. The results are reversible as a function of temperature variation.作者: Resistance 時(shí)間: 2025-3-26 03:54
lute reliability of our data. In general we will assign an error to each observation and use this error in the mathematical analysis. For an observed squared structure amplitude F. we estimate an error σ (F.).作者: 嗎啡 時(shí)間: 2025-3-26 06:39 作者: initiate 時(shí)間: 2025-3-26 09:19 作者: KEGEL 時(shí)間: 2025-3-26 13:11
Nato ASI Subseries B:http://image.papertrans.cn/e/image/306177.jpg作者: 幼兒 時(shí)間: 2025-3-26 18:16 作者: Blazon 時(shí)間: 2025-3-26 22:35 作者: AVID 時(shí)間: 2025-3-27 01:11
https://doi.org/10.1007/978-3-031-05871-4scription orsolids. Following the pioneering work of Thomas (1926) and Fermi (1928), in which the electronic properties of heavy atoms were described by the electron density, two parallel descriptions of electron states have been employed:.(i) Using one-body wave functions ., the Hartree and Hartree作者: 手段 時(shí)間: 2025-3-27 08:25 作者: Sleep-Paralysis 時(shí)間: 2025-3-27 12:39
https://doi.org/10.1007/978-3-319-10807-0bility of theoretical models to experimentally interesting systems. Our task is made easier by the excellent lectures on the fundamental theory given by Professor March and other participants of this school. Let us begin by remembering the connection between the basic N-electron quantum state . and 作者: 煤渣 時(shí)間: 2025-3-27 15:24
Richard S. Lazarus,Judith Blackfield Cohenby drawing lines of maximum wave amplitude. The incident source originating to the readers left and traveling or propagating toward the readers right will be represented by a series of parallel vertical lines with the inter line spacing corresponding to the wavelength. As the incident wave arrives a作者: Cursory 時(shí)間: 2025-3-27 19:46
Kerstin Schneider,Joachim Weimannal one in order to understand the relationship between integrated reflectivities and structure factors. It has been the object of several recent studies, especially a review by the author (Becker, 1977a). I would like here to present a few fundamental aspects of the problem, rather than a comprehens作者: Juvenile 時(shí)間: 2025-3-27 22:11 作者: Malcontent 時(shí)間: 2025-3-28 02:35 作者: 擁護(hù)者 時(shí)間: 2025-3-28 06:24 作者: 真 時(shí)間: 2025-3-28 14:28
A Biomechanical P.E.E.E.P. Show,tered wave and the scatterer. Really only the incident wave and the scatterer are prerequisite. The scattered wave results from the interaction of these two and it may be better to consider scattering simply as the response of a radiation field to a non-uniform potential. In the case of interest in 作者: Ferritin 時(shí)間: 2025-3-28 17:07 作者: 建筑師 時(shí)間: 2025-3-28 20:44
https://doi.org/10.1007/978-3-031-05871-4 wave functions, which, in turn are constructed from an appropriate one-electron Schr?dinger equation..(ii) By avoiding explicit use of wave functions, either one-body or many-body, and attempting to work directly . with the electron density . This is the basis of the modern density functional approach.作者: Aphorism 時(shí)間: 2025-3-29 01:55 作者: liaison 時(shí)間: 2025-3-29 06:47
in particular due to the simple physical significance of this function. Recent experimental progress in diffraction made the measurement of charge and magnetization densities in crystalline solids possible, with an accuracy at least as good as theoretical accuracy. Theoretical developments of the m作者: Conserve 時(shí)間: 2025-3-29 09:42 作者: THE 時(shí)間: 2025-3-29 15:26
A Biomechanical P.E.E.E.P. Show,se two and it may be better to consider scattering simply as the response of a radiation field to a non-uniform potential. In the case of interest in this lecture the radiation field is a beam of neutrons and the non-uniform potential is provided by the non-uniform magnetic field inside a magnetic material.作者: heterogeneous 時(shí)間: 2025-3-29 16:42 作者: heterogeneous 時(shí)間: 2025-3-29 21:22 作者: 膽小懦夫 時(shí)間: 2025-3-30 03:37
https://doi.org/10.1007/978-1-349-12789-4f this exercise. We shall consider the primary extinction correction y. (Eqs.18 and 19) as a constant given in the data. Its formulation in Becker-Coppens treatment is only phenomenological, but has the advantage that the integrated intensity P becomes proportional to the structure factor when the extinction parameter x.→ ∞.作者: 幻影 時(shí)間: 2025-3-30 04:38
Calculation of One-Electron Charge, Momentum, and Spin Densities: The Statistical Exchange Approximaarticle distributions or densities which are accessible to experiment. We can best display the hierarchy of density matrices and their final profection onto various “islands of experiment” in Fig. 1, borrowing from the Dick Weiss’ delightful model.作者: 彎曲道理 時(shí)間: 2025-3-30 11:09
Extinction Treatment in Polarized Neutron Experimentsf this exercise. We shall consider the primary extinction correction y. (Eqs.18 and 19) as a constant given in the data. Its formulation in Becker-Coppens treatment is only phenomenological, but has the advantage that the integrated intensity P becomes proportional to the structure factor when the extinction parameter x.→ ∞.作者: intricacy 時(shí)間: 2025-3-30 12:34
Diffraction by Real Crystals : II. Extinctiones, especially a review by the author (Becker, 1977a). I would like here to present a few fundamental aspects of the problem, rather than a comprehensive study. In particular, computational aspects will not be considered, since they have been extensively discussed elsewhere (Becker and Coppens, 1974a,b, 1975).作者: Introvert 時(shí)間: 2025-3-30 17:42
Magnetic Neutron Scatteringse two and it may be better to consider scattering simply as the response of a radiation field to a non-uniform potential. In the case of interest in this lecture the radiation field is a beam of neutrons and the non-uniform potential is provided by the non-uniform magnetic field inside a magnetic material.作者: 外星人 時(shí)間: 2025-3-30 22:03
Biomaterials in Vascular Surgerymic positions in unit cell, if they pay reasonable precautions to extinction. Nevertheless, once we intend to obtain the accurate charge distribution in ?rystalline states, we need to get rid of suffering from “extinction cold”.作者: 感染 時(shí)間: 2025-3-31 03:12 作者: 尾隨 時(shí)間: 2025-3-31 08:39
