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Physics-A Journal of General and Applied Physics最新文献

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Revised thermodynamic relations for λ transitions in mixtures. III. The saturated vapour of solutions of 3He in liquid 4He below their λ temperatures 修正了混合物中λ跃迁的热力学关系。3在低于λ温度的4He液体中3He溶液的饱和蒸气
Physics-A Journal of General and Applied Physics Pub Date : 1972-07-01 DOI: 10.1088/0305-4470/5/7/011
P. Wright
{"title":"Revised thermodynamic relations for λ transitions in mixtures. III. The saturated vapour of solutions of 3He in liquid 4He below their λ temperatures","authors":"P. Wright","doi":"10.1088/0305-4470/5/7/011","DOIUrl":"https://doi.org/10.1088/0305-4470/5/7/011","url":null,"abstract":"For pt. II see ibid., vol.5, 1015 (1972). On the basis of the discussion in part I of the possibility of obtaining Pippard's relations involving the dependence of a lambda temperature on the composition of mixtures, together with standard relations for liquid- vapour equilibria generally, comparisons are made between the behaviour of the specific heat of solutions of 3He in liquid 4He and (a) the change in the composition of the saturated vapour as the lambda temperature is approached, and (b) the change in the slope of the vapour pressure curve as the lambda temperature is approached.","PeriodicalId":54612,"journal":{"name":"Physics-A Journal of General and Applied Physics","volume":"14 1","pages":"1018-1024"},"PeriodicalIF":0.0,"publicationDate":"1972-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85613691","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: 1
Neutron total cross section of 31P between 0.75 MeV and 9.00 MeV 31P在0.75 MeV ~ 9.00 MeV之间的中子总截面
Physics-A Journal of General and Applied Physics Pub Date : 1972-07-01 DOI: 10.1088/0305-4470/5/7/017
J. Kellie, M. Islam, D. Syme, G. I. Crawford
{"title":"Neutron total cross section of 31P between 0.75 MeV and 9.00 MeV","authors":"J. Kellie, M. Islam, D. Syme, G. I. Crawford","doi":"10.1088/0305-4470/5/7/017","DOIUrl":"https://doi.org/10.1088/0305-4470/5/7/017","url":null,"abstract":"The total neutron cross section of 31P has been measured from a neutron energy of 0.75 MeV to 9.00 MeV. Good agreement is obtained with the calculated values using the generalized optical model potential of Wilmore and Hodgson.","PeriodicalId":54612,"journal":{"name":"Physics-A Journal of General and Applied Physics","volume":"5 1","pages":"1090-1094"},"PeriodicalIF":0.0,"publicationDate":"1972-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74348708","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
Extension of Wheeler-Feynman quantum theory to the relativistic domain. II. Emission processes 惠勒-费曼量子理论在相对论领域的扩展。2。发射过程
Physics-A Journal of General and Applied Physics Pub Date : 1972-07-01 DOI: 10.1088/0305-4470/5/7/012
P. Davies
{"title":"Extension of Wheeler-Feynman quantum theory to the relativistic domain. II. Emission processes","authors":"P. Davies","doi":"10.1088/0305-4470/5/7/012","DOIUrl":"https://doi.org/10.1088/0305-4470/5/7/012","url":null,"abstract":"For pt. I see abstr. A81745 of 1971. The classical radiation field is examined, clarifying some concepts and definitions, and the results of I are applied to derive the usual expressions for the real photon processes of conventional quantum electrodynamics.","PeriodicalId":54612,"journal":{"name":"Physics-A Journal of General and Applied Physics","volume":"271 1","pages":"1025-1036"},"PeriodicalIF":0.0,"publicationDate":"1972-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76811196","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: 54
Surface waves in hot plasmas 热等离子体中的表面波
Physics-A Journal of General and Applied Physics Pub Date : 1972-07-01 DOI: 10.1088/0305-4470/5/7/019
H. Barr, T. Boyd
{"title":"Surface waves in hot plasmas","authors":"H. Barr, T. Boyd","doi":"10.1088/0305-4470/5/7/019","DOIUrl":"https://doi.org/10.1088/0305-4470/5/7/019","url":null,"abstract":"Vlasov's equation and the full set of Maxwell's equations are solved as an initial value problem in a semi-infinite plasma. On specifying boundary conditions, a dispersion relation is obtained for surface waves in two situations, one without a wave incident on the boundary, the other with such a wave. The former case includes all previous results as special cases. In the latter case, it is found that surface waves cannot be excited by a wave incident on the boundary.","PeriodicalId":54612,"journal":{"name":"Physics-A Journal of General and Applied Physics","volume":"59 1","pages":"1108-1118"},"PeriodicalIF":0.0,"publicationDate":"1972-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88943890","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: 36
Matrix and tensor constructions from a generic SU(n) vector 泛型SU(n)向量的矩阵和张量构造
Physics-A Journal of General and Applied Physics Pub Date : 1972-07-01 DOI: 10.1088/0305-4470/5/7/014
K. J. Barnes, R. Delbourgo
{"title":"Matrix and tensor constructions from a generic SU(n) vector","authors":"K. J. Barnes, R. Delbourgo","doi":"10.1088/0305-4470/5/7/014","DOIUrl":"https://doi.org/10.1088/0305-4470/5/7/014","url":null,"abstract":"Projection operators appropriate to the general multispinor representations of SU(n) are constructed in a systematic way from the components of a single generic SU(n) vector transforming as the adjoint representation. The techniques have been devised with the problems of writing explicit forms for finite SU(n) rotations and nonlinear chiral Lagrangians kept specifically in mind. In particular, the general second rank tensors constructed from a single vector are found, counted, and exhibited in a very tractable form.","PeriodicalId":54612,"journal":{"name":"Physics-A Journal of General and Applied Physics","volume":"41 1","pages":"1043-1053"},"PeriodicalIF":0.0,"publicationDate":"1972-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85102483","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
Selfavoiding walks on a crystal lattice; a new approach to the mean- square end-to-end length ρn 自私的行走在水晶格子上;一种求解端到端均方长度ρn的新方法
Physics-A Journal of General and Applied Physics Pub Date : 1972-07-01 DOI: 10.1088/0305-4470/5/7/021
J. Martin
{"title":"Selfavoiding walks on a crystal lattice; a new approach to the mean- square end-to-end length ρn","authors":"J. Martin","doi":"10.1088/0305-4470/5/7/021","DOIUrl":"https://doi.org/10.1088/0305-4470/5/7/021","url":null,"abstract":"It is pointed out that the exponent gamma (for which the mean-square end-to-end length of an n step walk approximately= constant ngamma ) is associated also with other purely topological properties of the lattice. It is therefore suggested that a better numerical estimate of gamma may be possible, since the problem of the 'distance' between two sites of a network has been bypassed.","PeriodicalId":54612,"journal":{"name":"Physics-A Journal of General and Applied Physics","volume":"85 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1972-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73914198","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: 0
Spin assignments for some higher excited states in 34S 34S中一些高激发态的自旋分配
Physics-A Journal of General and Applied Physics Pub Date : 1972-07-01 DOI: 10.1088/0305-4470/5/7/016
G. Jones, E. Jayasinghe, P. Mulhern, I. G. Main, P. Twin
{"title":"Spin assignments for some higher excited states in 34S","authors":"G. Jones, E. Jayasinghe, P. Mulhern, I. G. Main, P. Twin","doi":"10.1088/0305-4470/5/7/016","DOIUrl":"https://doi.org/10.1088/0305-4470/5/7/016","url":null,"abstract":"The levels of 34S from 5.4 MeV to 7.3 MeV excitation energy have been studied by particle- gamma ray angular correlation experiments using the reaction 34P( alpha ,p)34S. Spin assignments of 2, 3, 4, 4, 1, 2 and 2 have been made to the levels at 5.680, 6.173, 6.250, 6.415, 6.480, 7.112 and 7.220 MeV respectively. Spin restrictions have been placed on other levels and some previous spin assignments have been confirmed. Branching ratios have been determined for many of the observed decay modes and multipole mixing ratios obtained for several transitions.","PeriodicalId":54612,"journal":{"name":"Physics-A Journal of General and Applied Physics","volume":"19 1","pages":"1073-1089"},"PeriodicalIF":0.0,"publicationDate":"1972-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81863556","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: 0
The theory of the longitudinal development of electromagnetic cascades 电磁叶栅纵向发展理论
Physics-A Journal of General and Applied Physics Pub Date : 1972-07-01 DOI: 10.1088/0305-4470/5/7/015
K. Thielheim, R. Zollner
{"title":"The theory of the longitudinal development of electromagnetic cascades","authors":"K. Thielheim, R. Zollner","doi":"10.1088/0305-4470/5/7/015","DOIUrl":"https://doi.org/10.1088/0305-4470/5/7/015","url":null,"abstract":"A method for the numerical integration of the cascade equations of the longitudinal development of electromagnetic cascades is described. Numerical results on the longitudinal development of electron induced cascades in lead are presented in graphical form. Comparisons with data from Monte Carlo simulations and with experimental data are presented. The accuracy of approximations A and B of conventional cascade theory is investigated.","PeriodicalId":54612,"journal":{"name":"Physics-A Journal of General and Applied Physics","volume":"38 1","pages":"1054-1072"},"PeriodicalIF":0.0,"publicationDate":"1972-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80314386","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: 4
COLLECTIVE MOTIONS AND SINGLE PARTICLE MODELS. 集体运动和单粒子模型。
Physics-A Journal of General and Applied Physics Pub Date : 1972-07-01 DOI: 10.1088/0305-4470/5/7/003
H. J. Mang
{"title":"COLLECTIVE MOTIONS AND SINGLE PARTICLE MODELS.","authors":"H. J. Mang","doi":"10.1088/0305-4470/5/7/003","DOIUrl":"https://doi.org/10.1088/0305-4470/5/7/003","url":null,"abstract":"The connection between single particle and collective motion is discussed on the basis of the generator coordinate method. Earlier and recent work on the subject is reviewed.","PeriodicalId":54612,"journal":{"name":"Physics-A Journal of General and Applied Physics","volume":"85 1","pages":"929-935"},"PeriodicalIF":0.0,"publicationDate":"1972-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83897677","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: 0
Experimental evidence for supersonic ion flow in a low pressure plasma 低压等离子体中超音速离子流的实验证据
Physics-A Journal of General and Applied Physics Pub Date : 1972-07-01 DOI: 10.1088/0305-4470/5/7/020
R. Varey, L. Kapp
{"title":"Experimental evidence for supersonic ion flow in a low pressure plasma","authors":"R. Varey, L. Kapp","doi":"10.1088/0305-4470/5/7/020","DOIUrl":"https://doi.org/10.1088/0305-4470/5/7/020","url":null,"abstract":"An experiment is described in which plane Langmuir probes with different orientations with respect to ion flow were used to measure ion velocity in the side arm of a low pressure mercury discharge. The ions appear to be supersonic, a result which confirms recent theoretical predictions.","PeriodicalId":54612,"journal":{"name":"Physics-A Journal of General and Applied Physics","volume":"37 1","pages":"1119-1122"},"PeriodicalIF":0.0,"publicationDate":"1972-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84225288","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: 0
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