Pub Date : 1972-07-01DOI: 10.1088/0305-4470/5/7/011
P. Wright
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.
{"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}
Pub Date : 1972-07-01DOI: 10.1088/0305-4470/5/7/017
J. Kellie, M. Islam, D. Syme, G. I. Crawford
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.
{"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}
Pub Date : 1972-07-01DOI: 10.1088/0305-4470/5/7/012
P. Davies
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.
{"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}
Pub Date : 1972-07-01DOI: 10.1088/0305-4470/5/7/019
H. Barr, T. Boyd
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.
{"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}
Pub Date : 1972-07-01DOI: 10.1088/0305-4470/5/7/014
K. J. Barnes, R. Delbourgo
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.
{"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}
Pub Date : 1972-07-01DOI: 10.1088/0305-4470/5/7/021
J. Martin
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.
{"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}
Pub Date : 1972-07-01DOI: 10.1088/0305-4470/5/7/016
G. Jones, E. Jayasinghe, P. Mulhern, I. G. Main, P. Twin
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.
{"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}
Pub Date : 1972-07-01DOI: 10.1088/0305-4470/5/7/015
K. Thielheim, R. Zollner
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.
{"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}
Pub Date : 1972-07-01DOI: 10.1088/0305-4470/5/7/003
H. J. Mang
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.
在生成坐标法的基础上，讨论了单粒子运动与集体运动的关系。本文回顾了关于这一主题的早期和最近的工作。
{"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}
Pub Date : 1972-07-01DOI: 10.1088/0305-4470/5/7/001
D. Khandekar, S. V. Lawande
Path integration for a one dimensional three body problem is discussed. This involves essentially the path integration of a Lagrangian in plane polar coordinates with a potential energy term depending on both the radial and angular coordinates.
{"title":"Path integration of a three body problem","authors":"D. Khandekar, S. V. Lawande","doi":"10.1088/0305-4470/5/7/001","DOIUrl":"https://doi.org/10.1088/0305-4470/5/7/001","url":null,"abstract":"Path integration for a one dimensional three body problem is discussed. This involves essentially the path integration of a Lagrangian in plane polar coordinates with a potential energy term depending on both the radial and angular coordinates.","PeriodicalId":54612,"journal":{"name":"Physics-A Journal of General and Applied Physics","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1972-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88632815","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}
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