{"title":"State mixing in collisions involving highly excited barium atoms.","authors":"Allegrini, Arimondo, Menchi, Burkhardt, Ciocca, Garver, Gozzini, Leventhal, Kelley","doi":"10.1063/1.37338","DOIUrl":"https://doi.org/10.1063/1.37338","url":null,"abstract":"Using two‐step laser excitation it is shown that the state distributions of highly excited barium atoms are substantially altered by inelastic collisions with barium atoms. For ‘‘pure’’ Rydberg states the initially produced ns or nd eigenstates are rapidly mixed with nearly degenerate n‘l’ states. For initially produced states that may be viewed as admixtures of Rydberg and doubly excited independent electron eigenstates, collisions convert the distribution to one with nearly pure, albeit state‐mixed, Rydberg character. Broadening of the absorption profiles of the highly excited states is also observed.","PeriodicalId":20125,"journal":{"name":"Physical review. A, General physics","volume":"2005 1","pages":"3271-3279"},"PeriodicalIF":0.0,"publicationDate":"2008-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86903611","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}
{"title":"Bethe stopping-power theory for heavy-target atoms.","authors":"Leung","doi":"10.1103/PHYSREVA.60.2562","DOIUrl":"https://doi.org/10.1103/PHYSREVA.60.2562","url":null,"abstract":"In spite of its applicability to relativistic incident particles it is well known that the Bethe stopping power theory limited to nonrelativistic target elements with eigenstates isfying the Schro ̈dinger equation for many-electron atom This limitation arises mainly from the derivation of the orig nal Bethe theory, which has applied the various nonrela istic sum rules~the Bethe and TRK sum rules ! @1#. For heavy elements, one would expect a nontrivial correction to Bethe theory due to the fast motion of the inner shell el trons. This problem was first pointed out by Fano in 1964 a review of the outstanding unsolved problems in stopp power theory which existed at that time @2#. Since then, to the knowledge of the author, not much effort has been voted to the study of this problem until recently @3–5#. As also pointed out by Fano in the same review @2#, the difficulty in solving this problem lies right in the possible gene alization of the various sum rules to the relativistic doma Indeed, the relativistic generalization of various atom sum rules has been an intriguing problem over the pas years since the first work on the generalization of the T sum rule@6#. It has been studied extensively in the literatu using both the single-particle and many-particle ~fieldtheoretic! approaches@7–11#. In a previous attempt, we hav used a semirelativistic single-particle approach to obtain leading relativistic correction terms to the Bethe sum rule @9# and applied the results to derive corrections to the Be stopping power theory for heavy target atoms @3#. Unfortunately, it was pointed out later @10# that in most of these previous works based on the same approach @6,7,9,11#, there exists an inconsistency in that the transformation of the erator was not included in the Foldy-Wouthuysen transf mation performed, which leads to the semirelativistic corr tion terms for the sum rules. Very recently @12#, this error has been corrected and it was found that while the prev corrections to the TRK sum rule were not affected by t error, those for the Bethe sum rule have to be modified. It is the purpose of this paper to apply these latest c rected results for the semirelativistic sum rules to amend previous work published in the correction to the Bethe st ping power theory@3#. As before, we shall limit ourselves t the single-particle case and apply the results to a real a by adopting the independent-particle, local-potential desc tion. Though this seems to be an oversimplified picture does have some success in the literature in the analys x-ray scattering data using the TRK sum rule @13#. In any case, our preliminary attempt will at least give a first es","PeriodicalId":20125,"journal":{"name":"Physical review. A, General physics","volume":"41 1","pages":"5417-5419"},"PeriodicalIF":0.0,"publicationDate":"1999-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81441591","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}
{"title":"Evolution of bioconvective patterns in variable gravity.","authors":"D A Noever","doi":"10.1103/physreva.44.5279","DOIUrl":"https://doi.org/10.1103/physreva.44.5279","url":null,"abstract":"<p><p>Measurements are reported of the evolution of bioconvective patterns in shallow, dense cultures of microorganisms subjected to varying gravity. Various statistical properties of this random, quasi-two-dimensional structure have been found: Aboav's law is obeyed, the average vertex angles follow predictions for regular polygons, and the area of a pattern varies linearly with its number of sides. As gravity varies between 1 g and 1.8g (g = 9.8 m s-1), these statistical properties continue to hold despite a tripling of the number of polygons and a reduced average polygon dimension by a third. This work compares with experiments on soap foams, Langmuir monolayer foams, metal grains, and simulations.</p>","PeriodicalId":20125,"journal":{"name":"Physical review. A, General physics","volume":"44 8","pages":"5279-91"},"PeriodicalIF":0.0,"publicationDate":"1991-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1103/physreva.44.5279","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20815197","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}
{"title":"Ionization of low-Rydberg-state He atoms by dipole-forbidden rotational deexcitation of NH3.","authors":"Shirai, Nakamura","doi":"10.1103/physreva.40.7377","DOIUrl":"https://doi.org/10.1103/physreva.40.7377","url":null,"abstract":"","PeriodicalId":20125,"journal":{"name":"Physical review. A, General physics","volume":"40 12","pages":"7377-7379"},"PeriodicalIF":0.0,"publicationDate":"1989-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1103/physreva.40.7377","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20806794","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}
{"title":"Wentzel-Kramers-Brillouin method in the Bargmann representation.","authors":"Voros","doi":"10.1103/physreva.40.6814","DOIUrl":"https://doi.org/10.1103/physreva.40.6814","url":null,"abstract":"","PeriodicalId":20125,"journal":{"name":"Physical review. A, General physics","volume":"40 12","pages":"6814-6825"},"PeriodicalIF":0.0,"publicationDate":"1989-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1103/physreva.40.6814","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20810841","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}
{"title":"Dielectronic recombination for C VI, and O VII,VII.","authors":"Bellantone, Hahn","doi":"10.1103/physreva.40.6913","DOIUrl":"https://doi.org/10.1103/physreva.40.6913","url":null,"abstract":"","PeriodicalId":20125,"journal":{"name":"Physical review. A, General physics","volume":"40 12","pages":"6913-6920"},"PeriodicalIF":0.0,"publicationDate":"1989-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1103/physreva.40.6913","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20810854","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}
{"title":"Fluctuations on electromagnetic showers due to an incomplete longitudinal containment.","authors":"De Angelis A","doi":"10.1103/physreva.40.7250","DOIUrl":"https://doi.org/10.1103/physreva.40.7250","url":null,"abstract":"","PeriodicalId":20125,"journal":{"name":"Physical review. A, General physics","volume":"40 12","pages":"7250-7252"},"PeriodicalIF":0.0,"publicationDate":"1989-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1103/physreva.40.7250","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20810892","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}
{"title":"Monte Carlo renormalization group with evolution in the space of parameters.","authors":"Caticha, Chahine, Drugowich de Félicio JR","doi":"10.1103/physreva.40.7431","DOIUrl":"https://doi.org/10.1103/physreva.40.7431","url":null,"abstract":"","PeriodicalId":20125,"journal":{"name":"Physical review. A, General physics","volume":"40 12","pages":"7431-7433"},"PeriodicalIF":0.0,"publicationDate":"1989-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1103/physreva.40.7431","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20810214","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}
{"title":"Photon noise reduction in lasers.","authors":"Haake, Tan, Walls","doi":"10.1103/physreva.40.7121","DOIUrl":"https://doi.org/10.1103/physreva.40.7121","url":null,"abstract":"","PeriodicalId":20125,"journal":{"name":"Physical review. A, General physics","volume":"40 12","pages":"7121-7132"},"PeriodicalIF":0.0,"publicationDate":"1989-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1103/physreva.40.7121","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20810878","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}
{"title":"Experimental study of atomic 4d giant resonances by photoabsorption and photoelectron spectroscopy: Sm, Eu, and Gd.","authors":"Richter, Meyer, Pahler, Prescher, Raven, Sonntag, Wetzel","doi":"10.1103/physreva.40.7007","DOIUrl":"https://doi.org/10.1103/physreva.40.7007","url":null,"abstract":"","PeriodicalId":20125,"journal":{"name":"Physical review. A, General physics","volume":"40 12","pages":"7007-7019"},"PeriodicalIF":0.0,"publicationDate":"1989-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1103/physreva.40.7007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20810863","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}