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AbstractAbstract
[en] The dynamic coupling between giant resonance states and 'soft' low-energy excitation modes in weakly-bound nuclei is investigated. A coupled-channels calculation is reported for the reaction 8B+Pb→p+7Be+Pb at 83 MeV/nucleon. It is shown that the low-energy response is only marginally modified by transitions to the isovector giant dipole and isoscalar giant quadrupole resonances
Primary Subject
Source
S0370269302027715; Copyright (c) 2002 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
ALKALINE EARTH ISOTOPES, BERYLLIUM ISOTOPES, BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, BORON ISOTOPES, DAYS LIVING RADIOISOTOPES, ELECTRON CAPTURE RADIOISOTOPES, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, EVEN-ODD NUCLEI, ISOTOPES, LIGHT NUCLEI, MEV RANGE, MILLISECONDS LIVING RADIOISOTOPES, MULTIPOLE TRANSITIONS, MULTIPOLES, NUCLEI, ODD-ODD NUCLEI, RADIOISOTOPES, RESONANCE, TENSORS, VECTORS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Bertulani, C.A.
Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)1993
Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)1993
AbstractAbstract
[en] The effects of a deformed projectile charge on the relativistic Coulomb excitation theory are investigated. The effects of relevance are (a) the variation of the minimum impact parameter as a function of the orientation of the projectile and (b) the modification of the time dependent electromagnetic field due to the projectile deformation. (orig.)
Primary Subject
Secondary Subject
Source
Sep 1993; 12 p
Record Type
Report
Literature Type
Numerical Data
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Country of publication
COULOMB EXCITATION, COULOMB FIELD, DEFORMED NUCLEI, E1-TRANSITIONS, ELECTROMAGNETIC FIELDS, EXCITATION, GEV RANGE 10-100, GIANT RESONANCE, IMPACT PARAMETER, INELASTIC SCATTERING, INTEGRAL CROSS SECTIONS, INTERFERENCE, LEAD 208, LEAD 208 TARGET, NUCLEAR DEFORMATION, RELATIVISTIC RANGE, ROTATIONAL STATES, SCATTERING AMPLITUDES, SERIES EXPANSION, SPHERICAL HARMONICS, THEORETICAL DATA, TIME DEPENDENCE, TRANSITION AMPLITUDES, URANIUM 238, URANIUM 238 REACTIONS
ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, AMPLITUDES, CROSS SECTIONS, DATA, DEFORMATION, ELECTRIC FIELDS, ENERGY LEVELS, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, EVEN-EVEN NUCLEI, EXCITED STATES, FUNCTIONS, GEV RANGE, HEAVY ION REACTIONS, HEAVY NUCLEI, INFORMATION, ISOTOPES, LEAD ISOTOPES, MULTIPOLE TRANSITIONS, NUCLEAR REACTIONS, NUCLEI, NUMERICAL DATA, RADIOISOTOPES, RESONANCE, SCATTERING, SPONTANEOUS FISSION RADIOISOTOPES, STABLE ISOTOPES, TARGETS, URANIUM ISOTOPES, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Bertulani, C.A.
Sociedade Brasileira de Fisica, Sao Paulo, SP (Brazil)1991
Sociedade Brasileira de Fisica, Sao Paulo, SP (Brazil)1991
AbstractAbstract
[en] Studies on nuclear properties, nuclear models, and particle production in heavy ion collisions, are presented. (M.C.K.)
Primary Subject
Secondary Subject
Source
1991; 258 p; 5. Swieca School in Nuclear Physics; Campos do Jordao, SP (Brazil); 19-28 Feb 1991
Record Type
Miscellaneous
Literature Type
Conference
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Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The stopping power of protons and deuterons in low energy collisions with helium gas targets is investigated with the numerical solution of the time-dependent Schroedinger coupled-channels equations using molecular orbital wavefunctions. It is shown that at low projectile energies the energy loss is mainly due to nuclear stopping, charge exchange, and the excitation of low energy levels in the target. The second and third mechanisms, called electronic stopping, dominate for Elab≥200 eV. At lower energies it is also shown that a threshold effect is responsible for a quick drop of the energy loss. This investigation sheds more light on the long-standing electron screening problem in fusion reactions of astrophysical interest
Primary Subject
Source
S0370269304002515; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
BARYONS, CALCULATION METHODS, CHARGED PARTICLES, DIFFERENTIAL EQUATIONS, ELEMENTARY PARTICLES, ELEMENTS, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, EQUATIONS, EV RANGE, FERMIONS, FLUIDS, FUNCTIONS, GASES, HADRONS, LEPTONS, MATHEMATICAL SOLUTIONS, NONMETALS, NUCLEONS, PARTIAL DIFFERENTIAL EQUATIONS, RARE GASES, WAVE EQUATIONS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
Bertulani, C.A.
Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)1995
Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)1995
AbstractAbstract
[en] The extraction of the photodissociation cross sections of 8B from Coulomb dissociation experiments is investigated. A careful study is done on the contributions of the E1, E2 and M1 multipolarities to the breakup. A comparison with the data of a recent experiment is performed. It is shown that the extraction of the radiative capture cross sections 7Be(p, γ)8B which are relevant for the solar neutrino problem is not affected appreciably by Coulomb reacceleration. A non-perturbative model is used for the purpose. Emphasis is put on the perspectives for future experiments which are planned at the University of Notre Dame, RIKEN (Japan), and GSI (Germany). An analysis of the total yields of ''photon-point'' processes in inelastic electron scattering is also done. (orig.)
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Secondary Subject
Source
Jan 1995; 36 p
Record Type
Report
Literature Type
Numerical Data
Report Number
Country of publication
ANGULAR CORRELATION, ANGULAR DISTRIBUTION, BERYLLIUM 7, BERYLLIUM 7 TARGET, BORON 8, BORON 8 TARGET, BRANCHING RATIO, BREAKUP REACTIONS, CAPTURE, COULOMB EXCITATION, DIFFERENTIAL CROSS SECTIONS, E1-TRANSITIONS, E2-TRANSITIONS, ELECTRON REACTIONS, ELECTRONS, ENERGY SPECTRA, GAMMA RADIATION, GEV RANGE 01-10, HEAVY ION REACTIONS, KNOCK-OUT REACTIONS, LEAD 208, LEAD 208 TARGET, M1-TRANSITIONS, MEV RANGE 01-10, MEV RANGE 100-1000, MEV RANGE 10-100, MILLISEC LIVING RADIOISOTOPES, OCCUPATION NUMBER, PHOTONS, PHOTONUCLEAR REACTIONS, PHOTOPROTONS, PROBABILITY, PROTON REACTIONS, QUASI-ELASTIC SCATTERING, SOLAR NEUTRINOS, THEORETICAL DATA
BARYON REACTIONS, BARYONS, BERYLLIUM ISOTOPES, BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, BORON ISOTOPES, BOSONS, CATIONS, CHARGED PARTICLES, CORRELATIONS, CROSS SECTIONS, DATA, DAYS LIVING RADIOISOTOPES, DIRECT REACTIONS, DISTRIBUTION, ELECTROMAGNETIC RADIATION, ELECTRON CAPTURE RADIOISOTOPES, ELEMENTARY PARTICLES, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, EXCITATION, FERMIONS, GEV RANGE, HADRON REACTIONS, HADRONS, HEAVY NUCLEI, HYDROGEN IONS, HYDROGEN IONS 1 PLUS, INFORMATION, IONIZING RADIATIONS, IONS, ISOTOPES, LEAD ISOTOPES, LEPTON REACTIONS, LEPTONS, LIGHT NUCLEI, MASSLESS PARTICLES, MEV RANGE, MULTIPOLE TRANSITIONS, NEUTRINOS, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, NUCLEONS, NUMERICAL DATA, ODD-ODD NUCLEI, PHOTONUCLEONS, PROTONS, RADIATIONS, RADIOISOTOPES, SCATTERING, SOLAR PARTICLES, SOLAR RADIATION, SPECTRA, STABLE ISOTOPES, STELLAR RADIATION, TARGETS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Bertulani, C.A.
Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)1996
Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)1996
AbstractAbstract
[en] The amplification of the E2 and M1 electromagnetic transitions in the radiative capture reaction 7B(p, γ)8B is investigated. This amplification occurs in Coulomb dissociation experiments. Interference between the excitation amplitudes of E1, E2 and M1 multipolarities leads to anisotropy effects in the angular correlations of the fragments. Dynamical coupling which could affect the direct correspondence between the Coulomb breakup and the radiative capture cross sections are studied by means of a coupled-channels approach. (orig.)
Primary Subject
Source
Jan 1996; 16 p
Record Type
Report
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Country of publication
AMPLITUDES, BARYON REACTIONS, BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, BORON ISOTOPES, CORRELATIONS, ELECTRIC FIELDS, ELECTROMAGNETIC RADIATION, ENERGY-LEVEL TRANSITIONS, HADRON REACTIONS, IONIZING RADIATIONS, ISOTOPES, LIGHT NUCLEI, MULTIPOLE TRANSITIONS, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, ODD-EVEN NUCLEI, ODD-ODD NUCLEI, RADIATIONS, RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The E2 cross section calculated by Langanke and Shoppa (LS) for the RIKEN data on the Coulomb dissociation of 8B, uses E2 matrix elements from a specific model that predicts large E2 component. But when all nuclear models are considered no large E2 is implied. The authors also note that Fred Barker has already criticized the nuclear model used by LS. In addition LS have incorrectly calculated the cross section, ignoring among other things the finite angular resolution of the RIKEN experiment. A chi-square model independent analysis of the RIKEN data (with angular averaging etc.) allow the authors to deduce an upper limit on the E2 component and exclude LS result (more than a factor of 2). The model dependent analysis of LS should not be considered as a correction to the RIKEN result, as claimed, and their so called quoted corrected S17(0) is not substantiated
Primary Subject
Secondary Subject
Source
1993 joint meeting of the American Physical Society and the American Association of Physics Teachers; Washington, DC (United States); 12-15 Apr 1993; CONF-9304297--
Record Type
Journal Article
Literature Type
Conference
Journal
Country of publication
BARYON REACTIONS, BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, BORON ISOTOPES, DISTRIBUTION, ELECTRIC FIELDS, ENERGY-LEVEL TRANSITIONS, EXCITATION, HADRON REACTIONS, ISOTOPES, LIGHT NUCLEI, MULTIPOLE TRANSITIONS, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, ODD-ODD NUCLEI, RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Published in summary form only
Primary Subject
Source
International Union of Pure and Applied Physics; Sao Paulo Univ., SP (Brazil); 496 p; 1989; p. 396; International Nuclear Physics Conference; Sao Paulo, SP (Brazil); 20-26 Aug 1989
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Bertulani, C.A.
Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)1993
Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)1993
AbstractAbstract
[en] The use of the Coulomb dissociation method to obtain the cross sections for the radiative capture reactions 12C(α, γ)16O and 7Be(p, γ)8B is investigated. The contribution of the nuclear interaction to the breakup is included. Due to the low binding of the proton in 8B the second reaction is dominated by Coulomb breakup. The effects of Coulomb reacceleration of the fragments and of the excitation of states in the fragments is also studied. Ideal kinematical conditions for the experiments are investigated. (orig.)
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Secondary Subject
Source
Nov 1993; 20 p
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Report
Literature Type
Numerical Data
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Country of publication
ALPHA PARTICLES, ALPHA REACTIONS, ANGULAR DISTRIBUTION, BERYLLIUM 7, BERYLLIUM 7 TARGET, BORON 8, BREAKUP REACTIONS, CAPTURE, CARBON 12, CARBON 12 TARGET, COULOMB EXCITATION, CROSS SECTIONS, DETAILED BALANCE PRINCIPLE, DIFFERENTIAL CROSS SECTIONS, DWBA, E1-TRANSITIONS, E2-TRANSITIONS, EXCITATION, GAMMA RADIATION, GEV RANGE 01-10, HEAVY ION REACTIONS, IMPACT PARAMETER, KNOCK-OUT REACTIONS, LEAD 208, LEAD 208 TARGET, MATRIX ELEMENTS, MEV RANGE 100-1000, MILLISEC LIVING RADIOISOTOPES, OXYGEN 16, OXYGEN 16 REACTIONS, PHOTONS, PROTON REACTIONS, PROTONS, QUASI-ELASTIC SCATTERING, STRENGTH FUNCTIONS, THEORETICAL DATA
BARYON REACTIONS, BARYONS, BERYLLIUM ISOTOPES, BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, BORN APPROXIMATION, BORON ISOTOPES, BOSONS, CARBON ISOTOPES, CATIONS, CHARGED PARTICLES, DATA, DAYS LIVING RADIOISOTOPES, DIRECT REACTIONS, DISTRIBUTION, ELECTROMAGNETIC RADIATION, ELECTRON CAPTURE RADIOISOTOPES, ELEMENTARY PARTICLES, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, FERMIONS, FUNCTIONS, GEV RANGE, HADRON REACTIONS, HADRONS, HEAVY NUCLEI, HELIUM IONS, HYDROGEN IONS, HYDROGEN IONS 1 PLUS, INFORMATION, INVARIANCE PRINCIPLES, IONIZING RADIATIONS, IONS, ISOTOPES, LEAD ISOTOPES, LIGHT NUCLEI, MASSLESS PARTICLES, MEV RANGE, MULTIPOLE TRANSITIONS, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, NUCLEONS, NUMERICAL DATA, ODD-ODD NUCLEI, OXYGEN ISOTOPES, RADIATIONS, RADIOISOTOPES, SCATTERING, STABLE ISOTOPES, T INVARIANCE, TARGETS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The possibility of obtaining the photodisintegration cross section using the equivalent-photon number method first deduced and employed for the Coulomb disintegration processes has been suggested. This is very interesting because there exist radioactive capture processes, related to the photodisintegration through time reversal, that are relevant in astrophysics. In this paper, the recent results of the Karlsruhe and the Texas A and M groups on the Coulomb disintegration of 6Li and 7Li and the problems of the method are discussed. The ideas developed in a previous paper (Nucl. Phys. A458 (1986) 188) are confirmed qualitatively. To understand the process quantitatively it is necessary to use a quantum treatment that would imply the introduction of Coulomb excitation effects of higher orders. The Coulomb disintegration of exotic secondary beams is also studied. It is particularly interesting the question about what kind of nuclear structure information, as binding energies of momentum distributions, may be obtained. (Author)
[es]
Se ha sugerido la posibilidad de deducir la seccion eficaz para el proceso de fotodesintegracion utilizando el metodo de los fotones equivalentes deducido y utilizado en los procesos de desintegracion coulombiana. Esto es sumamente interesante porque existen procesos de captura radiactiva, relacionados con la fotodesintegracion por inversion temporal, que son de gran interes en astrofisica. En este trabajo, se discuten los ultimos resultados de los grupos de Karlsruhe y de Texas A y M para la desintegracion coulombiana de 6Li y 7Li y los problemas inherentes al metodo. Se confirman cualitativamente las ideas delineadas en un trabajo anterior (Nucl. Phys. A458 (1986) 188). Para entender el proceso cuantitativamente es necesario utilizar un tratamiento cuantico que implicaria la introduccion de efectos de excitacion coulombiana a ordenes superiores. Tambien se estudia la desintegracion coulombiana de haces secundarios exoticos. Resulta particularmente interesante la pregunta sobre que tipo de informacion acerca de la estructura nuclear, como energia de ligadura o distribucion de momentos, puede extraerse. (Autor)Original Title
Dissociacao coulombiana como fonte de informacao para processos de interesse em Astrofisica Nuclear
Primary Subject
Source
Comision Nacional de Energia Atomica, Buenos Aires (Argentina). Dept. de Fisica; 299 p; 1989; p. 275-282; Workshop on nuclear physics; 11. Reunion de trabajo en fisica nuclear; Buenos Aires (Argentina); 23-26 Aug 1988; Also available from Comision Nacional de Energia Atomica, Buenos Aires (AR)
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Miscellaneous
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Conference
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