Pub Date : 2001-03-01DOI: 10.1556/APH.13.2001.1-3.19
M. Ito, Y. Sakuragi
Molecular resonances having the 6He+6He and 4He+6He structures, which have recently been observed in the highly excited 12Be and 10Be, respectively, are studied by the microscopic coupled-channels (CC) calculation in which excitations of the soft-dipole and quadrupole modes of the colliding 6He nuclei are taken into account in the Goldhaber-Teller model. The CC calculation predicts several molecular-rotational bands in the energy range of the observed resonances and the energies and spins of the calculated resonances agree well with the experimental data.
{"title":"Molecular States in Highly-Excited 12 Be and 10 Be","authors":"M. Ito, Y. Sakuragi","doi":"10.1556/APH.13.2001.1-3.19","DOIUrl":"https://doi.org/10.1556/APH.13.2001.1-3.19","url":null,"abstract":"Molecular resonances having the 6He+6He and 4He+6He structures, which have recently been observed in the highly excited 12Be and 10Be, respectively, are studied by the microscopic coupled-channels (CC) calculation in which excitations of the soft-dipole and quadrupole modes of the colliding 6He nuclei are taken into account in the Goldhaber-Teller model. The CC calculation predicts several molecular-rotational bands in the energy range of the observed resonances and the energies and spins of the calculated resonances agree well with the experimental data.","PeriodicalId":7004,"journal":{"name":"Acta Physica Hungarica","volume":"81 1","pages":"157-161"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77066261","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 : 2001-03-01DOI: 10.1556/APH.13.2001.1-3.16
M. Hunyadi, J. Cseh, A. Algora, P. Hess
Microscopic aspects of the fission channels of 252Cf are studied using the U(3) selection rule. Effective U(3) symmetry labels, which are consistent with deformation, are used to characterize the parent and daughter nuclei. Our study shows a non-uniform structural dependence of the relative preference for different fission channels.
{"title":"Clusterization of Heavy Nuclei from the Microscopic Point of View: Application of the U(3) Selection Rule to 252 Cf","authors":"M. Hunyadi, J. Cseh, A. Algora, P. Hess","doi":"10.1556/APH.13.2001.1-3.16","DOIUrl":"https://doi.org/10.1556/APH.13.2001.1-3.16","url":null,"abstract":"Microscopic aspects of the fission channels of 252Cf are studied using the U(3) selection rule. Effective U(3) symmetry labels, which are consistent with deformation, are used to characterize the parent and daughter nuclei. Our study shows a non-uniform structural dependence of the relative preference for different fission channels.","PeriodicalId":7004,"journal":{"name":"Acta Physica Hungarica","volume":"146 1","pages":"145-148"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73772163","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 : 2001-03-01DOI: 10.1556/APH.13.2001.1-3.6
R. Casten
The advent of radioactive nuclear beams (RNBs) has led to a rapid growth in the study of exotic nuclei. Already a number of major discoveries have been made. Examples are halo nuclei, mapping the bounds of nuclear existence, assessing the fragility of magicity, producing special nuclei such as 100Sn and 48Ni, and measuring key reaction rates of astrophysic interest. The growth in this field in the next decade will be enormous. With advanced RNB facilities being planned or under construction, more and more exotic nuclei will become accessible. One of the most interesting opportunities will be the study of the evolution of nuclear structure along extended iso-chains of nuclei. A prime example is Ni, where four magic numbers (20, 28, 40, and 50) and five major shells will be accessible. Structural evolution will be discussed from several standpoints, both theoretical and experimental, with emphasis on methods to obtain a maximum of information on new nuclei from the sparse data that will be available at the extremes of accessible N/Z ratios.
{"title":"Structural evolution along iso-chains of nuclei","authors":"R. Casten","doi":"10.1556/APH.13.2001.1-3.6","DOIUrl":"https://doi.org/10.1556/APH.13.2001.1-3.6","url":null,"abstract":"The advent of radioactive nuclear beams (RNBs) has led to a rapid growth in the study of exotic nuclei. Already a number of major discoveries have been made. Examples are halo nuclei, mapping the bounds of nuclear existence, assessing the fragility of magicity, producing special nuclei such as 100Sn and 48Ni, and measuring key reaction rates of astrophysic interest. The growth in this field in the next decade will be enormous. With advanced RNB facilities being planned or under construction, more and more exotic nuclei will become accessible. One of the most interesting opportunities will be the study of the evolution of nuclear structure along extended iso-chains of nuclei. A prime example is Ni, where four magic numbers (20, 28, 40, and 50) and five major shells will be accessible. Structural evolution will be discussed from several standpoints, both theoretical and experimental, with emphasis on methods to obtain a maximum of information on new nuclei from the sparse data that will be available at the extremes of accessible N/Z ratios.","PeriodicalId":7004,"journal":{"name":"Acta Physica Hungarica","volume":"64 1","pages":"41-49"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84217463","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 : 2001-01-01DOI: 10.1556/APH.14.2001.1-4.2
W. Scheid, G. Adamian, S. P. Ivanova, A. Diaz-Torres, N. Antonenko, V. Volkov
{"title":"Fusion to Superheavy Nuclei and Quasifission","authors":"W. Scheid, G. Adamian, S. P. Ivanova, A. Diaz-Torres, N. Antonenko, V. Volkov","doi":"10.1556/APH.14.2001.1-4.2","DOIUrl":"https://doi.org/10.1556/APH.14.2001.1-4.2","url":null,"abstract":"","PeriodicalId":7004,"journal":{"name":"Acta Physica Hungarica","volume":"9 1","pages":"3-12"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87018009","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 : 2000-07-02DOI: 10.1556/APH.13.2001.1-3.14
A. Marinov, S. Gelberg, D. A. H. U. O. Jerusalem, Kassel University
Long-lived high-spin super- and hyper-deformed isomeric states, which exhibit themselves by abnormal radioactive decays, have been observed using the 160 + 197Au and 28Si + 181Ta reactions. They make it possible to understand the production, via secondary reactions, of the long-lived superheavy element with Z=112 and of the abnormally low energy and very enhanced α-particles seen in various actinide sources. They may also explain some puzzling phenomena seen in nature.
{"title":"Abnormal radioactive decays out of long-lived super- and hyper-deformed isomeric states","authors":"A. Marinov, S. Gelberg, D. A. H. U. O. Jerusalem, Kassel University","doi":"10.1556/APH.13.2001.1-3.14","DOIUrl":"https://doi.org/10.1556/APH.13.2001.1-3.14","url":null,"abstract":"Long-lived high-spin super- and hyper-deformed isomeric states, which exhibit themselves by abnormal radioactive decays, have been observed using the 160 + 197Au and 28Si + 181Ta reactions. They make it possible to understand the production, via secondary reactions, of the long-lived superheavy element with Z=112 and of the abnormally low energy and very enhanced α-particles seen in various actinide sources. They may also explain some puzzling phenomena seen in nature.","PeriodicalId":7004,"journal":{"name":"Acta Physica Hungarica","volume":"21 1","pages":"133-137"},"PeriodicalIF":0.0,"publicationDate":"2000-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85157366","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 : 2000-06-17DOI: 10.1556/APH.13.2001.1-3.15
A. Afanasjev, P. Ring
The rotational and deformation properties of superdeformed fission isomers in the A ∼ 240 mass region have been investigated within the framework of the cranked relativistic Hartree-Bogoliubov theory. The dependence of the results of the calculations on the parametrization of the RMF Lagrangian has been studied. The rotational properties are best described by the NL1 force.
{"title":"Properties of Superdeformed Fission Isomers in the Cranked Relativistic Hartree-Bogoliubov Theory","authors":"A. Afanasjev, P. Ring","doi":"10.1556/APH.13.2001.1-3.15","DOIUrl":"https://doi.org/10.1556/APH.13.2001.1-3.15","url":null,"abstract":"The rotational and deformation properties of superdeformed fission isomers in the A ∼ 240 mass region have been investigated within the framework of the cranked relativistic Hartree-Bogoliubov theory. The dependence of the results of the calculations on the parametrization of the RMF Lagrangian has been studied. The rotational properties are best described by the NL1 force.","PeriodicalId":7004,"journal":{"name":"Acta Physica Hungarica","volume":"46 1","pages":"139-144"},"PeriodicalIF":0.0,"publicationDate":"2000-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91029519","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 : 2000-01-24DOI: 10.1556/APH.15.2002.1-2.1
T. Csorgo
Recent developments are summarized in the theory of Bose-Einstein and Fermi-Dirac correlations, with emphasis on the necessity of a simultaneous analysis of particle spectra and quantum statistical correlations for a detailed reconstruction of the space-time picture of particle emission. This review is limited to the following topics: basics and formalism of quantum-statistical correlations; the core/halo picture for n-particle Bose-Einstein correlations; particle interferometry in e+e- collisions including the Andersson-Hofmann model; the invariant Buda-Lund particle interferometry; the Buda-Lund, the Bertsch-Pratt and Yano-Koonin-Podgoretskii parameterizations, the Buda-Lund hydro model and its applications to (π/K)+p and Pb+Pb collisions at CERN SPS, and to low-energy heavy-ion collisions; the binary-source formalism and the related oscillations in the two-particle Bose-Einstein and Fermi-Dirac correlation functions; the experimental signals of expanding rings of fire and shells of fire in particle and heavy-ion physics and their similarity to planetary nebulae in stellar astronomy.
{"title":"Particle Interferometry from 40 MeV to 40 TeV","authors":"T. Csorgo","doi":"10.1556/APH.15.2002.1-2.1","DOIUrl":"https://doi.org/10.1556/APH.15.2002.1-2.1","url":null,"abstract":"Recent developments are summarized in the theory of Bose-Einstein and Fermi-Dirac correlations, with emphasis on the necessity of a simultaneous analysis of particle spectra and quantum statistical correlations for a detailed reconstruction of the space-time picture of particle emission. This review is limited to the following topics: basics and formalism of quantum-statistical correlations; the core/halo picture for n-particle Bose-Einstein correlations; particle interferometry in e+e- collisions including the Andersson-Hofmann model; the invariant Buda-Lund particle interferometry; the Buda-Lund, the Bertsch-Pratt and Yano-Koonin-Podgoretskii parameterizations, the Buda-Lund hydro model and its applications to (π/K)+p and Pb+Pb collisions at CERN SPS, and to low-energy heavy-ion collisions; the binary-source formalism and the related oscillations in the two-particle Bose-Einstein and Fermi-Dirac correlation functions; the experimental signals of expanding rings of fire and shells of fire in particle and heavy-ion physics and their similarity to planetary nebulae in stellar astronomy.","PeriodicalId":7004,"journal":{"name":"Acta Physica Hungarica","volume":"8 2 1","pages":"1-80"},"PeriodicalIF":0.0,"publicationDate":"2000-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78348284","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}
M. D. Jong, A. Oudenaarden, J. Sietsma, M. Rekveldt, A. V. D. Beukel
{"title":"Internal stresses in amorphous Fe40Ni40B20 studied with neutron depolarization","authors":"M. D. Jong, A. Oudenaarden, J. Sietsma, M. Rekveldt, A. V. D. Beukel","doi":"10.1007/BF03156562","DOIUrl":"https://doi.org/10.1007/BF03156562","url":null,"abstract":"","PeriodicalId":7004,"journal":{"name":"Acta Physica Hungarica","volume":"161 1","pages":"91-100"},"PeriodicalIF":0.0,"publicationDate":"1994-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74918574","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}
M. Balaskó, E. Sváb, I. Cserháti, F. Ozsvári, J. Oláh
{"title":"Applications of dynamic neutron and gamma radiography at the Budapest research reactor","authors":"M. Balaskó, E. Sváb, I. Cserháti, F. Ozsvári, J. Oláh","doi":"10.1007/BF03156577","DOIUrl":"https://doi.org/10.1007/BF03156577","url":null,"abstract":"","PeriodicalId":7004,"journal":{"name":"Acta Physica Hungarica","volume":"13 1","pages":"227-230"},"PeriodicalIF":0.0,"publicationDate":"1994-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75728959","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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