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AbstractAbstract
[en] Electron scattering from nuclei, with and without coincidence with other outgoing particles, is a tool of remarkable versatility for nuclear structure investigations. Elastic scattering, and inelastic scattering to both discrete and continuum states has led to unique insight into nuclear sizes and shapes, occupancy of single particle orbits, transition charge and current densities, core polarization and correlations, and many other aspects of the structure and dynamics of nuclei. Recent experimental results are reviewed and compared to theoretical models of nuclear structure
Primary Subject
Source
Depommier, P. (ed.); 849 p; ISBN 2-86332-072-6;
; 1989; p. 425-462; Editions Frontieres; Gif-sur-Yvette (France); International Symposium on Weak and Electromagnetic Interactions in Nuclei (WEIN-89); Montreal, PQ (Canada); 15-19 May 1989

Record Type
Book
Literature Type
Conference
Country of publication
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Avila L, J.
Universidad Nacional de Ingenieria, Lima (Peru)1987
Universidad Nacional de Ingenieria, Lima (Peru)1987
AbstractAbstract
[en] Microscopic cross sections measured by thermal neutron activation using RP-0 reactor at the Peruvian Nuclear Energy Institute. The method consists in measuring microscopic cross section ratios through activated samples, requiring being corrected in thermal and epithermal energetic range by Westcott formalism. Furthermore, the comptage ratios measured for each photopeak to its decay fraction should be normalized from interrelation between both processes above, activation microscopic cross sections are obtained
Original Title
Medicion de secciones eficaces icroscopicas de activacion termica
Primary Subject
Source
Aug 1987; 112 p; Available from Instituto Peruano de Energia Nuclear; Thesis (M.Sc.).
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
Country of publication
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AbstractAbstract
[en] From the decay of their most intense γ-ray spectra the half-lives of 24Na, 31Si, 49Ca, 52Y, 139Ba, 142Pr, 153Sm, 159Gd, 165Dy, 166Ho, 175Yb, 187W, 233Th and 239U were redetermined. The obtained values were found more accurate then the existing ones. (author) 15 refs.; 4 figs.; 2 tabs
Primary Subject
Record Type
Journal Article
Literature Type
Numerical Data
Journal
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AbstractAbstract
[en] Published in summary form only
Primary Subject
Source
Sao Paulo Univ., SP (Brazil); 277 p; 1988; p. 4; 4. International Symposium on Radiation Physics; Sao Paulo, SP (Brazil); 3-7 Oct 1988
Record Type
Miscellaneous
Literature Type
Conference
Report Number
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Reference NumberReference Number
INIS VolumeINIS Volume
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Asami, T.; Nakagawa, T.; Mizumoto, M.; Narita, T.; Shibata, K.; Chiba, S.; Fukahori, T.; Hasegawa, A.; Igarasi, S.
Nuclear data for science and technology1988
Nuclear data for science and technology1988
AbstractAbstract
[en] The compilation of the Japanese Evaluated Nuclear Data Library, Version 3 (JENDL-3) has been made in the Japanese Nuclear Data Committee and is now in a final stage. JENDL-3 has been planned so as to meet requirements from fields of fusion researches and radiation shieldings as well as designs of thermal- and fast reactors. In JENDL-3, much emphasis was placed on improvement of high-energy neutron data, inclusion of photon production data and consideration of measured double differential neutron emission cross sections. Much efforts were also made in full revisions of JENDL-2 data for fissile nuclides and structural materials. This paper gives an outline of JENDL-3 project and the present status of its compilation. (author)
Primary Subject
Source
Igarashi, S. (ed.) (Japan Atomic Energy Research Inst., Tokai, Ibaraki. Tokai Research Establishment); Japan Atomic Energy Research Inst., Tokyo (Japan); 1326 p; 1988; p. 533-536; Saikon Publishing Co., Ltd; Tokyo (Japan); International conference on nuclear data for science and technology; Mito, Ibaraki (Japan); 30 May - 3 Jun 1988
Record Type
Book
Literature Type
Conference
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INIS IssueINIS Issue
AbstractAbstract
[en] The structure of the vacuum has become of general importance in modern physics. In this context the vacuum of quantum electrodynamics plays a special role because it changes drastically in strong external electric fields and these changes can be followed in a controllable way in the laboratory. It is reviewed how in supercritical electric fields the electron-positron-vacuum, i.e. the ground state of QED is changing from a neutral to a charged vacuum. The theoretical concepts, developed during the last 15 years, can be tested in collisions of very heavy ions, like U-U, U + Cm etc. The important theoretical and experimental stages are described; in particular it is shown that the vacuum decay has recently been experimentally verified: Sharp line structures in the positron spectra with pronounced threshold effects are the signals of this fundamental phase transition. At the same time the positron line structures indicate the existence of rather long-living giant nuclear systems with Z -- 180-190. It is shown that most likely giant nuclear molecules have been formed whose structure can eventually be investigated spectroscopically by the positrons from the vacuum: The positron spectrum should not only show the vacuum decay line, but also Raman and perhaps Stokes-satellites revealing the nuclear collective modes of the giant system formed. Finally the overcritical phenomenon in other areas of physics (e.g. overcritical gluo-electric fields, overcritical gravitational fields) is shortly discussed
Primary Subject
Secondary Subject
Source
Wilhelmi, Z.; Kicinska-Habior, M; vp; ISBN 3-7186-0239-3;
; 1986; vp; Harwood Academic Pub; New York, NY (USA); 15. international summer school in nuclear physics; Mikolajki (Poland); 5-17 Sep 1983

Record Type
Book
Literature Type
Conference; Numerical Data
Country of publication
COLLECTIVE EXCITATIONS, COLLECTIVE MODEL, ELECTRIC FIELDS, ELECTRON SPECTRA, ELECTRON-POSITRON INTERACTIONS, EXPERIMENTAL DATA, GIANT RESONANCE, GRAVITATIONAL FIELDS, GROUND STATES, LEAD, NUCLEAR STRUCTURE, PHASE TRANSFORMATIONS, QUANTUM ELECTRODYNAMICS, RADIATIVE DECAY, RAMAN SPECTROSCOPY, REVIEWS, THEORETICAL DATA, URANIUM, VACUUM STATES
ACTINIDES, DATA, DECAY, DOCUMENT TYPES, ELECTRODYNAMICS, ELEMENTS, ENERGY LEVELS, ENERGY-LEVEL TRANSITIONS, EXCITATION, FIELD THEORIES, INFORMATION, INTERACTIONS, LASER SPECTROSCOPY, LEPTON-LEPTON INTERACTIONS, MATHEMATICAL MODELS, METALS, NUCLEAR MODELS, NUMERICAL DATA, PARTICLE DECAY, PARTICLE INTERACTIONS, QUANTUM FIELD THEORY, RESONANCE, SPECTRA, SPECTROSCOPY
Reference NumberReference Number
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AbstractAbstract
[en] The analysis of the neutron spectra from the proton reactions with 27AL , 52Cr, 56Fe, sup(58,60)Ni, sup(90,91,94)Zr, 115In and 181Ta are performed. The equilibrium emission neutron spectra are described on the basis of the statistical theory, the level density parameters of 30 nuclei are determined. A comparison is made with the results of a similar analy ysis of experimental data from the (p, xn) reaction at Esub(p)=11 MeV. Cross sections of some evaporation steps are compared with the experiment. Most of th he nuclei investigated exhibit a certain decrease in the energy-level density as compared with the data obtained at Esub(p)=11 MeV, the tungsten isotopes pre esenting an exseption. The w isotopes have energy-level densities by about 10% higher than the data at Esub(p)=11 MeV. The computation results point to a significant role of the radiation channel at the decay last stage
Original Title
Analiz nejtronnykh spektrov pri vzaimodejstvii protonov s ehnergiej 22 MeV s yadrami
Primary Subject
Source
For English translation see the journal Soviet Journal of Nuclear Physics (USA).
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Yadernaya Fizika; ISSN 0044-0027;
; v. 39(2); p. 264-271

Country of publication
ALUMINIUM 27 TARGET, ANGULAR DISTRIBUTION, CHROMIUM 52 TARGET, ENERGY-LEVEL DENSITY, EXPERIMENTAL DATA, INDIUM 115 TARGET, INTEGRAL CROSS SECTIONS, IRON 56 TARGET, MEV RANGE 10-100, NEUTRON EMISSION, NEUTRON SPECTRA, NICKEL ISOTOPES, PRECOMPOUND-NUCLEUS EMISSION, PROTON REACTIONS, TANTALUM 181 TARGET, ZIRCONIUM ISOTOPES
Reference NumberReference Number
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AbstractAbstract
[en] Earlier unknown total cross sections and cross sections of inelastic interactions of antiprotons with C, Al, Ti, Cd nuclei at the incident antiproton momenta of 1.45 and 1.8 GeV/c are measured. Measurements are carrned out by the transmission method using the secondary universal beam of the ITEP proton synchrotron. Multiwire proportional chambers were used instead of traditional scintillation counters. The measurement method is described and the results are presented. The proton interaction cross sections with these nuclei at the momenta of 1.52 and 1.8 GeV/c are also presented. A part of the data on the proton interactions are used to test the measurement method, and some data are new. Coincidence of measurement results with data of other papers confirms the method measurements. The results are described reasonably by means of the Glauber multiple scattering theory
Original Title
Secheniya vzaimodejstviya antiprotonov s yadrami C,Al,Ti i Cd v oblasti 1,5 GehV/s
Primary Subject
Source
For English translation see the journal Soviet Journal of Nuclear Physics (USA).
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Yadernaya Fizika; ISSN 0044-0027;
; v. 40(1); p. 34-42

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AbstractAbstract
[en] The preequilibrium, statistical nuclear code GNASH developed at LANL provides a useful device to evaluate secondary gamma-ray and particle emission cross sections. The new version (2/17/84 version) has been converted into FORTRAN-77 language in FACOM-M380 and ACOS-1000. It was improved in LANL by adopting master equation model for preequilibrium process and adding new input formats for level density parameters and gamma-ray strength functions. Additionally, we improved it by adopting the recent works for nuclear level density by Gruppelaar et al. and Yamamuro. The code runs after the spherical optical model calculation by ELIESE-3 to obtain the particle transmission coefficients. It is found that the calculated results for sample problem are sensitive to nuclear level density parameters of daughter nuclei. In the paper, future scope of the code is also described. (author)
Primary Subject
Source
Asami, Tetsuo; Igarasi, Sin-iti (Japan Atomic Energy Research Inst., Tokai, Ibaraki. Tokai Research Establishment) (eds.); Japan Atomic Energy Research Inst., Tokyo; 414 p; Mar 1985; p. 205-219; 1984 seminar on nuclear data; Tokai, Ibaraki (Japan); 13-15 Nov 1984
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Report
Literature Type
Conference
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AbstractAbstract
[en] Results of recent measurements on isotope shifts are compiled for 20 chains of isotopes, mostly concerning short-lived radioactives. Unpublished material is also included. The delta< r2> are re-evaluated by using an improved calculation of the electron density at the nucleus. Therefore, in some elements, minor changes occur as compared to results given in the literature. (Auth.)
Primary Subject
Source
International workshop on hyperfine interactions; Kanpur (India); 16-25 Jan 1984
Record Type
Journal Article
Literature Type
Conference; Numerical Data
Journal
Country of publication
ACCURACY, BARIUM ISOTOPES, CADMIUM ISOTOPES, CALCIUM ISOTOPES, CESIUM ISOTOPES, COMPILED DATA, DYSPROSIUM ISOTOPES, ERBIUM ISOTOPES, ERRORS, EUROPIUM ISOTOPES, EVALUATED DATA, FRANCIUM ISOTOPES, GADOLINIUM ISOTOPES, GOLD ISOTOPES, INDIUM ISOTOPES, LEAD ISOTOPES, MERCURY ISOTOPES, NUCLEAR RADII, POTASSIUM ISOTOPES, RADIUM ISOTOPES, RUBIDIUM ISOTOPES, SAMARIUM ISOTOPES, SODIUM ISOTOPES, SPECTRAL SHIFT, TIN ISOTOPES, YTTERBIUM ISOTOPES
Reference NumberReference Number
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