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The configuration 4f116p in the lanthanide spectra 镧系光谱中的4f116p结构
Physica Pub Date : 1974-10-01 DOI: 10.1016/0031-8914(74)90284-5
J.F. Wyart, J.J.A. Koot , Th.A.M. Van Kleef
{"title":"The configuration 4f116p in the lanthanide spectra","authors":"J.F. Wyart,&nbsp;J.J.A. Koot ,&nbsp;Th.A.M. Van Kleef","doi":"10.1016/0031-8914(74)90284-5","DOIUrl":"10.1016/0031-8914(74)90284-5","url":null,"abstract":"<div><p>The configurations 4f<sup>11</sup>6p in Ho II and Er III and 4f<sup>11</sup>6p6s<sup>2</sup> in Er I have been located. Energy-level calculations of these configurations which produce the same terms are compared with experimental data.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 1","pages":"Pages 159-164"},"PeriodicalIF":0.0,"publicationDate":"1974-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90284-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89288028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Magnetic interactions in 3-dimensional B.C.C. Heisenberg ferromagnets. IV: Analysis of the experimental results and discussion of the covalency effects 三维b.c.c Heisenberg铁磁体中的磁相互作用。四、实验结果分析及共价效应讨论
Physica Pub Date : 1974-10-01 DOI: 10.1016/0031-8914(74)90276-6
T.O. Klaassen, W.J. Looyestijn, N.J. Poulis
{"title":"Magnetic interactions in 3-dimensional B.C.C. Heisenberg ferromagnets. IV: Analysis of the experimental results and discussion of the covalency effects","authors":"T.O. Klaassen,&nbsp;W.J. Looyestijn,&nbsp;N.J. Poulis","doi":"10.1016/0031-8914(74)90276-6","DOIUrl":"10.1016/0031-8914(74)90276-6","url":null,"abstract":"<div><p>The experimental results on the NMR investigation of the six isomorphous crystals with the K<sub>2</sub>CuCl<sub>4</sub>.2H<sub>2</sub>O structure, as reported in previous papers, are analysed. The covalency effects within the CuCl<sub>4</sub>.2H<sub>2</sub>O<sup>2-</sup> octahedron are described by a molecular orbital model. Good agreement between the copper electronic <em>g</em> tensor and nuclear hyperfine interaction tensor on the one hand, and the ligand spin-transfer coefficients on the other hand is obtained. The importance of spin transfer from the ligands towards the empty copper 4s and 4p orbitals is outlined.</p><p>The superexchange interactions in these compounds are discussed qualitatively on the basis of the ligand spin-transfer coefficients.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 1","pages":"Pages 43-77"},"PeriodicalIF":0.0,"publicationDate":"1974-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90276-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90892060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Collisional depolarization of excited sodium atoms 受激钠原子的碰撞退极化
Physica Pub Date : 1974-10-01 DOI: 10.1016/0031-8914(74)90282-1
M. Elbel, B. Kamke, W.B. Schneider
{"title":"Collisional depolarization of excited sodium atoms","authors":"M. Elbel,&nbsp;B. Kamke,&nbsp;W.B. Schneider","doi":"10.1016/0031-8914(74)90282-1","DOIUrl":"10.1016/0031-8914(74)90282-1","url":null,"abstract":"<div><p>Sodium vapour is excited by D<sub>2</sub> radiation. The linear polarization of the fluorescent D<sub>2</sub> radiation emitted at right angles to the incident-light beam is measured as a function of the pressure of an added noble gas. A magnetic field of 270 Oe which points parallel to the incident-light beam, serves to decouple the nuclear spin in the excited state. From the decrease of the polarization observed at rising pressure, cross sections for the disalignment of the electron in the excited state are derived. They are 167, 174, 308, 341, 376 Å<sup>2</sup> for the noble gases He, Ne, Ar, Kr, Xe at 383 K. These and earlier results on sodium depolarization are summarized and compared with theoretical results by Masnou <em>et al.</em>, Reid, and Lewis <em>et al</em>. Satisfactory agreement is obtained.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 1","pages":"Pages 137-147"},"PeriodicalIF":0.0,"publicationDate":"1974-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90282-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83579677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Electric dipole centres and colour centres in natural sodalite 天然方钠石中的电偶极中心和色心
Physica Pub Date : 1974-10-01 DOI: 10.1016/0031-8914(74)90274-2
W.E. Van Den Brom, J. Kerssen, J. Volger
{"title":"Electric dipole centres and colour centres in natural sodalite","authors":"W.E. Van Den Brom,&nbsp;J. Kerssen,&nbsp;J. Volger","doi":"10.1016/0031-8914(74)90274-2","DOIUrl":"https://doi.org/10.1016/0031-8914(74)90274-2","url":null,"abstract":"<div><p>Experiments on an electric dipole centre, exhibiting multiple relaxation, in the natural mineral sodalite, are described. The concentration of the dipole centres is reduced upon X irradiation, whereas simultaneously colour centres and paramagnetic centres arise. Thermal bleaching restores the original concentrations. The interrelationships between these centres are established.</p><p>A model is proposed in which the dipole centre is ascribed to an interstitial monovalent metal ion (say a Na<sup>+</sup> ion) acting as a charge compensator for an Al<sup>3+</sup> ion, substituted for a Si<sup>4+</sup> ion. This Al-Na complex may be destroyed by X rays, yielding an electron trapped at the sodium ion and a hole trapped at a nonbridging oxygen ion, adjacent to the Al<sup>3+</sup> ion, to which both the optical and paramagnetic properties of the X ray induced centres are attributed.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 1","pages":"Pages 1-26"},"PeriodicalIF":0.0,"publicationDate":"1974-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90274-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72274189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
The ground terms in the spectra cobalt IV, nickel V and copper VI 钴IV、镍V和铜VI光谱中的基态
Physica Pub Date : 1974-10-01 DOI: 10.1016/0031-8914(74)90285-7
R. Poppe, Th.A.M. Van Kleef, A.J.J. Raassen
{"title":"The ground terms in the spectra cobalt IV, nickel V and copper VI","authors":"R. Poppe,&nbsp;Th.A.M. Van Kleef,&nbsp;A.J.J. Raassen","doi":"10.1016/0031-8914(74)90285-7","DOIUrl":"https://doi.org/10.1016/0031-8914(74)90285-7","url":null,"abstract":"<div><p>The levels of the lowest term, <sup>5</sup>D, in the 3d<sup>6</sup> configuration and the levels of the 3d<sup>5</sup> (<sup>6</sup>S) 4p <sup>5</sup>P<sup>0</sup> in the spectra of Co IV, Ni V and Cu VI have been established. A comparison is made between the intervals in these multiplets in the isoelectronic sequence Cr I-Cu VI. Predictions are given for the analogous intervals in Zn VII and the wavelength region of the corresponding lines in that spectrum.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 1","pages":"Pages 165-173"},"PeriodicalIF":0.0,"publicationDate":"1974-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90285-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72274665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Calculation of anistropic glories for atom—molecule collisions 原子-分子碰撞各向异性荣耀的计算
Physica Pub Date : 1974-10-01 DOI: 10.1016/0031-8914(74)90288-2
W. Franssen, J. Reuss
{"title":"Calculation of anistropic glories for atom—molecule collisions","authors":"W. Franssen,&nbsp;J. Reuss","doi":"10.1016/0031-8914(74)90288-2","DOIUrl":"https://doi.org/10.1016/0031-8914(74)90288-2","url":null,"abstract":"","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 1","pages":"Pages 203-204"},"PeriodicalIF":0.0,"publicationDate":"1974-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90288-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72274666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A note on a cryogenic temperature scale 低温刻度上的一个音符
Physica Pub Date : 1974-10-01 DOI: 10.1016/0031-8914(74)90279-1
R.E. Bedford, C. Prins
{"title":"A note on a cryogenic temperature scale","authors":"R.E. Bedford,&nbsp;C. Prins","doi":"10.1016/0031-8914(74)90279-1","DOIUrl":"10.1016/0031-8914(74)90279-1","url":null,"abstract":"<div><p>The relationship to the IPTS-68 of the cryogenic temperature scale that has been used by Michels and collaborators at the Van der Waals-Laboratory of the University of Amsterdam is properly established.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 1","pages":"Pages 121-125"},"PeriodicalIF":0.0,"publicationDate":"1974-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90279-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76611430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
On the propagation and scattering of light in fluids 光在流体中的传播和散射
Physica Pub Date : 1974-09-15 DOI: 10.1016/0031-8914(74)90155-4
B.U. Felderhof
{"title":"On the propagation and scattering of light in fluids","authors":"B.U. Felderhof","doi":"10.1016/0031-8914(74)90155-4","DOIUrl":"10.1016/0031-8914(74)90155-4","url":null,"abstract":"<div><p>A new theory of propagation and scattering of light in fluids is formulated. The analysis is based on a resummation of the Kirkwood-Yvon series expansion for the dielectric constant. The resummation is equivalent to a renormalization procedure recently proposed by Bedeaux and Mazur in which vacuum propagators are replaced by propagators corresponding to a continuum with dielectric constant given by the Lorentz-Lorenz formula. It is shown that the phenomenological Einstein formula for the differential scattering cross section follows naturally from the theory.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"76 3","pages":"Pages 486-502"},"PeriodicalIF":0.0,"publicationDate":"1974-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90155-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89437029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 56
A manifestly gauge-invariant hamiltonian formulation of classical electrodynamics 经典电动力学的一个明显的标准不变哈密顿公式
Physica Pub Date : 1974-09-15 DOI: 10.1016/0031-8914(74)90153-0
R. Balescu, M. Poulain
{"title":"A manifestly gauge-invariant hamiltonian formulation of classical electrodynamics","authors":"R. Balescu,&nbsp;M. Poulain","doi":"10.1016/0031-8914(74)90153-0","DOIUrl":"10.1016/0031-8914(74)90153-0","url":null,"abstract":"<div><p>A manifestly gauge-invariant hamiltonian formulation of classical electrodynamics is constructed by taking the electromagnetic fields as the basic dynamical quantities, obeying appropriate Lie-bracket relations. The longitudinal parts of the fields can be eliminated completely from the beginning. The theory is relativistically covariant: the generators of the Poincaré Lie algebra are given explicitly. Explicit realizations of the Lie-bracket operation are derived (they are different from the usual Poisson brackets), and the relativistic Liouville equations are presented.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"76 3","pages":"Pages 421-444"},"PeriodicalIF":0.0,"publicationDate":"1974-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90153-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86061951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Classical one-dimensional gas of hard rods with an interaction of finite range 具有有限范围相互作用的经典一维硬棒气体
Physica Pub Date : 1974-09-15 DOI: 10.1016/0031-8914(74)90162-1
T. Morita, Y. Fukui
{"title":"Classical one-dimensional gas of hard rods with an interaction of finite range","authors":"T. Morita,&nbsp;Y. Fukui","doi":"10.1016/0031-8914(74)90162-1","DOIUrl":"10.1016/0031-8914(74)90162-1","url":null,"abstract":"<div><p>The classical one-dimensional gas of hard rods with an interaction of finite range is investigated. The Gibbs potential, the distribution function of a finite number of successive particles, and the average length per particle of that system are shown to be expressed in terms of the eigenvalue with the smallest absolute value and the corresponding eigenfunction of a homogeneous linear integral equation. Byckling's equation is criticized.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"76 3","pages":"Pages 616-632"},"PeriodicalIF":0.0,"publicationDate":"1974-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90162-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86828404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
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