Pub Date : 1966-03-01DOI: 10.1051/JPHYS:01966002703-4023700
L. Langouet, A. T. D. Roodenbeke
2014 Calculation of the intensity of luminescence versus the intensity of excitation, even near saturation, makes it possible to evaluate the absorption coefficient. Experimental corroboration is given. LE JOURNAL DE PHYSIQUE TOME 27, MARS-AVRIL 1966,
{"title":"Saturation de l'mission des substances fluorescentes","authors":"L. Langouet, A. T. D. Roodenbeke","doi":"10.1051/JPHYS:01966002703-4023700","DOIUrl":"https://doi.org/10.1051/JPHYS:01966002703-4023700","url":null,"abstract":"2014 Calculation of the intensity of luminescence versus the intensity of excitation, even near saturation, makes it possible to evaluate the absorption coefficient. Experimental corroboration is given. LE JOURNAL DE PHYSIQUE TOME 27, MARS-AVRIL 1966,","PeriodicalId":54899,"journal":{"name":"Journal de Physique et le Radium","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1966-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79842977","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 : 1966-03-01DOI: 10.1051/JPHYS:01966002703-4014200
A. Daunois, J. Deiss, B. Meyer
Etude spectrophotometrique de l'absorption bleue et violette de Cu2O aux temperatures de l'azote et de l'helium liquides. On a pu evaluer le facteur d'intensite d'oscillateur des raies bleues et violettes et attribuer le spectre a des transitions excitoniques de premiere classe.
{"title":"tude spectrophotomtrique de l'absorption bleue et violette de Cu2O","authors":"A. Daunois, J. Deiss, B. Meyer","doi":"10.1051/JPHYS:01966002703-4014200","DOIUrl":"https://doi.org/10.1051/JPHYS:01966002703-4014200","url":null,"abstract":"Etude spectrophotometrique de l'absorption bleue et violette de Cu2O aux temperatures de l'azote et de l'helium liquides. On a pu evaluer le facteur d'intensite d'oscillateur des raies bleues et violettes et attribuer le spectre a des transitions excitoniques de premiere classe.","PeriodicalId":54899,"journal":{"name":"Journal de Physique et le Radium","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1966-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83739135","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 : 1966-03-01DOI: 10.1051/JPHYS:01966002703-4018300
J. Thouvenin
La propagation d'une onde de choc dans un solide poreux est examinee sous l'angle de la discontinuite et de la periodicite des phenomenes associes au caractere granuleux du solide. On definit une vitesse de propagation de la phase et ses valeurs sont calculees et verifiees experimentalement pour Cu, Al, Ni et U poreux. On montre egalement que la vitesse de surface libre du solide poreux est egale a celle du solide compact. On deduit ensuite de l'analyse des ondes reflechies de grain a grain que le solide tend vers un etat d'equilibre, dont le point representatif se place, au second ordre pres, sur l'adiabatique dynamique du solide compact, contrairement aux theories deja publiees par d'autres auteurs.
{"title":"Action d'une onde de choc sur un solide poreux","authors":"J. Thouvenin","doi":"10.1051/JPHYS:01966002703-4018300","DOIUrl":"https://doi.org/10.1051/JPHYS:01966002703-4018300","url":null,"abstract":"La propagation d'une onde de choc dans un solide poreux est examinee sous l'angle de la discontinuite et de la periodicite des phenomenes associes au caractere granuleux du solide. On definit une vitesse de propagation de la phase et ses valeurs sont calculees et verifiees experimentalement pour Cu, Al, Ni et U poreux. On montre egalement que la vitesse de surface libre du solide poreux est egale a celle du solide compact. On deduit ensuite de l'analyse des ondes reflechies de grain a grain que le solide tend vers un etat d'equilibre, dont le point representatif se place, au second ordre pres, sur l'adiabatique dynamique du solide compact, contrairement aux theories deja publiees par d'autres auteurs.","PeriodicalId":54899,"journal":{"name":"Journal de Physique et le Radium","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1966-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74051434","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 : 1966-03-01DOI: 10.1051/JPHYS:01966002703-4022000
J. Lajzerowicz
2014 Using probability methods, distribution laws of collective coordinate, have been established. With these laws, studies of the Ising model have been caried out, establishing the purely probabilistic character of certain approximations. It has been possible to rederive results previously obtained with diagram techniques. An application to adsorption has been made. Some properties of collective coordinates are given in the appendix.
{"title":"Loi de distribution en probabilité des coordonnées collectives. Application à certains problèmes de mécanique statistique","authors":"J. Lajzerowicz","doi":"10.1051/JPHYS:01966002703-4022000","DOIUrl":"https://doi.org/10.1051/JPHYS:01966002703-4022000","url":null,"abstract":"2014 Using probability methods, distribution laws of collective coordinate, have been established. With these laws, studies of the Ising model have been caried out, establishing the purely probabilistic character of certain approximations. It has been possible to rederive results previously obtained with diagram techniques. An application to adsorption has been made. Some properties of collective coordinates are given in the appendix.","PeriodicalId":54899,"journal":{"name":"Journal de Physique et le Radium","volume":"317 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1966-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75454923","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 : 1966-03-01DOI: 10.1051/JPHYS:01966002703-4012500
P. Kessler, R. Lachaux, C. Berdah, D. Schulmann
2014 We have calculated the intensities and polarization rates of " equivalent beams " of off-shell photons which can be obtained under realistic conditions in electroproduction experiments (with coincidence measurements). LE JOURNAL DE PIiYSIQUE TOME 27, i biAR~-A~’RIL 1966, Étant donné l’intérêt, qui se manifeste actuellement parmi les physiciens travaillant auprès des grands accélérateurs d’électrons, en faveur d’expériences de photoproduction réalisées avec des faisceaux polarisés, il nous paraît utile d’attirer l’attention, comme l’ont fait récemment d’autres auteurs également [1, 2] sur les faisceaux virtuels de photons polarisés dont on dispose dans les expériences d’électroproduction directe. En effet, les photons « hors couche », qui sont les particules intermédiaires de l’électroproduction, possèdent une polarisation bien définie (plus ou moins forte suivant les conditions cinématiques). Dans le présent travail, notre propos est de donner, à l’intention des expérimentateurs, quelques indications quantitatives sur les intensités et les degrés de pola-
{"title":"Faisceaux virtuels de photons polariss","authors":"P. Kessler, R. Lachaux, C. Berdah, D. Schulmann","doi":"10.1051/JPHYS:01966002703-4012500","DOIUrl":"https://doi.org/10.1051/JPHYS:01966002703-4012500","url":null,"abstract":"2014 We have calculated the intensities and polarization rates of \" equivalent beams \" of off-shell photons which can be obtained under realistic conditions in electroproduction experiments (with coincidence measurements). LE JOURNAL DE PIiYSIQUE TOME 27, i biAR~-A~’RIL 1966, Étant donné l’intérêt, qui se manifeste actuellement parmi les physiciens travaillant auprès des grands accélérateurs d’électrons, en faveur d’expériences de photoproduction réalisées avec des faisceaux polarisés, il nous paraît utile d’attirer l’attention, comme l’ont fait récemment d’autres auteurs également [1, 2] sur les faisceaux virtuels de photons polarisés dont on dispose dans les expériences d’électroproduction directe. En effet, les photons « hors couche », qui sont les particules intermédiaires de l’électroproduction, possèdent une polarisation bien définie (plus ou moins forte suivant les conditions cinématiques). Dans le présent travail, notre propos est de donner, à l’intention des expérimentateurs, quelques indications quantitatives sur les intensités et les degrés de pola-","PeriodicalId":54899,"journal":{"name":"Journal de Physique et le Radium","volume":"125 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1966-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77397838","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 : 1966-03-01DOI: 10.1051/JPHYS:01966002703-4021300
R. Plumier
{"title":"Étude par diffraction de neutrons de l'antiferromagnétisme hélicoïdal du spinelle ZnCr2Se4 en présence d'un champ magnétique","authors":"R. Plumier","doi":"10.1051/JPHYS:01966002703-4021300","DOIUrl":"https://doi.org/10.1051/JPHYS:01966002703-4021300","url":null,"abstract":"","PeriodicalId":54899,"journal":{"name":"Journal de Physique et le Radium","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1966-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89802695","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 : 1966-03-01DOI: 10.1051/JPHYS:01966002703-4019501
C. Peyre, Joan Escola Pujol, J. Thouvenin
2014 The experimental device presented here brings to light in a single experiment the number of shock waves traveling in a solid, their velocity and pressure. The basic idea is to have the outcoming shock waves reach the surface of the solid slantingly, to make it possible to record the successive displacements of the image of a fixed luminous source with a streak camera. This way, the fundamental character of the shock phenomena, i.e. its discontinuous aspect can be observed on the film directly. LE JOURNAL DE PHYSIQUE TOME 27. MARS-AVRIL 1966, PAGE 195. Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphys:01966002703-4019501
{"title":"Mthode exprimentale pour l'analyse de la structure d'une onde de choc dans un solide","authors":"C. Peyre, Joan Escola Pujol, J. Thouvenin","doi":"10.1051/JPHYS:01966002703-4019501","DOIUrl":"https://doi.org/10.1051/JPHYS:01966002703-4019501","url":null,"abstract":"2014 The experimental device presented here brings to light in a single experiment the number of shock waves traveling in a solid, their velocity and pressure. The basic idea is to have the outcoming shock waves reach the surface of the solid slantingly, to make it possible to record the successive displacements of the image of a fixed luminous source with a streak camera. This way, the fundamental character of the shock phenomena, i.e. its discontinuous aspect can be observed on the film directly. LE JOURNAL DE PHYSIQUE TOME 27. MARS-AVRIL 1966, PAGE 195. Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphys:01966002703-4019501","PeriodicalId":54899,"journal":{"name":"Journal de Physique et le Radium","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1966-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77924512","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 : 1966-03-01DOI: 10.1051/JPHYS:01966002703-4024100
L. Galatry, J. L. Men
Apres avoir deduit une relation generale relative a l'orthogonalite des fonctions propres de l'operateur de Liouville, on calcule les valeurs propres et fonctions propres de l'operateur de Liouville relatif a un rotateur lineaire rigide. Les fonctions propres sont obtenues dans l'espace de configuration (θ, ϕ) du rotateur, pour une orientation et une longueur donnees du vecteur moment angulaire. On etudie l'orthogonalite de ces fonctions propres qui constitue un cas particulier de la relation obtenue auparavant et qui permet de traiter, comme cas particulier, le cas du rotateur plan.
{"title":"Fonctions propres et valeurs propres de l'oprateur de Liouville du rotateur linaire rigide","authors":"L. Galatry, J. L. Men","doi":"10.1051/JPHYS:01966002703-4024100","DOIUrl":"https://doi.org/10.1051/JPHYS:01966002703-4024100","url":null,"abstract":"Apres avoir deduit une relation generale relative a l'orthogonalite des fonctions propres de l'operateur de Liouville, on calcule les valeurs propres et fonctions propres de l'operateur de Liouville relatif a un rotateur lineaire rigide. Les fonctions propres sont obtenues dans l'espace de configuration (θ, ϕ) du rotateur, pour une orientation et une longueur donnees du vecteur moment angulaire. On etudie l'orthogonalite de ces fonctions propres qui constitue un cas particulier de la relation obtenue auparavant et qui permet de traiter, comme cas particulier, le cas du rotateur plan.","PeriodicalId":54899,"journal":{"name":"Journal de Physique et le Radium","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1966-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86934931","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 : 1966-01-01DOI: 10.1051/JPHYS:01966002701-205700
A. Authier
2014 The validity conditions of the derivation of the expression for the variation of the reciprocal lattice vector after a déformation are discussed. The variation of the departure from Bragg’s law as a function of the displacement of the atoms is derived. It is taken as a value of the effective lattice misorientation for the reflecting planes considered. The distribution of equal misorientations enables one to interpret the images of defects on X-ray topographs. LE JOURNAL DE PHYSIQUE TOME 27, JANVIBR-FÉYRIER 1966, PAGE
{"title":"Étude de la distribution des déformations observables sur les topographies par rayons X de cristaux presque parfaits","authors":"A. Authier","doi":"10.1051/JPHYS:01966002701-205700","DOIUrl":"https://doi.org/10.1051/JPHYS:01966002701-205700","url":null,"abstract":"2014 The validity conditions of the derivation of the expression for the variation of the reciprocal lattice vector after a déformation are discussed. The variation of the departure from Bragg’s law as a function of the displacement of the atoms is derived. It is taken as a value of the effective lattice misorientation for the reflecting planes considered. The distribution of equal misorientations enables one to interpret the images of defects on X-ray topographs. LE JOURNAL DE PHYSIQUE TOME 27, JANVIBR-FÉYRIER 1966, PAGE","PeriodicalId":54899,"journal":{"name":"Journal de Physique et le Radium","volume":"144 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1966-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76817279","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 : 1966-01-01DOI: 10.1051/JPHYS:01966002701-203700
S. Maes
2014 When resonance between vibrational frequencies of polyatomic molecules occurs, the contact-transformation method proposed by Shaffer, Nielsen and Thomas is not directly applicable. It has been shown by Nielsen, then by Grenier-Besson, Amat and Nielsen, that in this case the transformation function should be a modified one. This problem is treated here in the case of the Coriolis resonance, when the question of the computation of the rotationvibration énergies is extended to a third order of approximation. LE JOURNAL DE PHYSIQUE TOME 27, JANYIER-FEVRIER 1966, PAGE .
{"title":"Corrections du 2e et du 3e ordre à l'énergie de vibration-rotation des molécules polyatomiques dans le cas d'une résonance de coriolis","authors":"S. Maes","doi":"10.1051/JPHYS:01966002701-203700","DOIUrl":"https://doi.org/10.1051/JPHYS:01966002701-203700","url":null,"abstract":"2014 When resonance between vibrational frequencies of polyatomic molecules occurs, the contact-transformation method proposed by Shaffer, Nielsen and Thomas is not directly applicable. It has been shown by Nielsen, then by Grenier-Besson, Amat and Nielsen, that in this case the transformation function should be a modified one. This problem is treated here in the case of the Coriolis resonance, when the question of the computation of the rotationvibration énergies is extended to a third order of approximation. LE JOURNAL DE PHYSIQUE TOME 27, JANYIER-FEVRIER 1966, PAGE .","PeriodicalId":54899,"journal":{"name":"Journal de Physique et le Radium","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1966-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86084301","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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