Photodisintegration of the deuteron

1984 ◽  
Vol 62 (11) ◽  
pp. 1072-1082 ◽  
Author(s):  
W-Y. P. Hwang
Keyword(s):  
Energy Transfer ◽  
Energy Region ◽  
Experimental Studies ◽  
Deuteron Photodisintegration ◽  
High Energies ◽  
Spin Observables ◽  
Intermediate Energies ◽  
Entire Energy ◽  
Quark Substructure ◽  
Major Emphasis

This paper examines those basic theoretical aspects that, in the author's opinion, are relevant for future experimental studies of deuteron photodisintegration, or its time-reversed reaction, at low, intermediate, and high energies. At low photon energies, i.e., [Formula: see text], theoretical aspects stressed by the various authors are contrasted and discussed. At intermediate energies, i.e., [Formula: see text], the major emphasis has to do with the importance of studying the role played by isobars [Δ(1232)], especially in sorting out effects related to substantial energy transfer to the baryonic system. At high energies, i.e., [Formula: see text], the prospect of unraveling manifestations of the quark substructure of hadrons is briefly discussed. For the entire energy region surveyed in this paper, [Formula: see text], it appears essential to measure spin observables so as to disentangle manifestations of the various important aspects relevant for the reaction.

scholarly journals Processes of hypernuclei formation in relativistic ion collisions

2018 ◽  
Vol 171 ◽  
pp. 13001
Author(s):  
Alexander Botvina ◽  
Marcus Bleicher
Keyword(s):  
Experimental Research ◽  
Statistical Models ◽  
Low Temperatures ◽  
Particle Physics ◽  
Broad Distribution ◽  
High Energies ◽  
Intermediate Energies ◽  
Ion Collisions ◽  
High And Low Temperatures

The study of hypernuclei in relativistic ion collisions open new opportunities for nuclear and particle physics. The main processes leading to the production of hypernuclei in these reactions are the disintegration of large excited hyper-residues (target- and projectile-like), and the coalescence of hyperons with other baryons into light clusters. We use the transport, coalescence and statistical models to describe the whole reaction, and demonstrate the effectiveness of this approach: These reactions lead to the abundant production of multi-strange nuclei and new hypernuclear states. A broad distribution of predicted hypernuclei in masses and isospin allows for investigating properties of exotic hypernuclei, as well as the hypermatter both at high and low temperatures. There is a saturation of the hypernuclei production at high energies, therefore, the optimal way to pursue this experimental research is to use the accelerator facilities of intermediate energies, like FAIR (Darmstadt) and NICA (Dubna).

Electron Energy Dependence of Amorphization in Zr3Fe

1993 ◽  
Vol 316 ◽  
Author(s):  
A.T. Motta ◽  
L.M. Howe ◽  
P.R. Okamoto
Keyword(s):  
Electron Energy ◽  
Cross Section ◽  
Sharp Increase ◽  
Low Dose ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
High Energies ◽  
Intermediate Energies ◽  
Low Energies ◽  
Order Of Magnitude

ABSTRACTThis paper reports the results from a study conducted to determine the effect of electron energy on the dose-to-amorphization of Zr3Fe at 23-30 K. Zr3Fe samples were irradiated in the HVEM at Argonne National Laboratory, at energies ranging from 200 to 900 keV. Amorphization occurred at electron energies from 900 keV down to 250 keV. Three distinct regions were observed: between 900 and 700 keV amorphization occurred at a constant low dose of ~ 4 × 1021 e cm-2; a higher plateau at 1022 was observed between 600 and 400 keV, and finally there was a sharp increase in the dose-to-amorphization below 400 keV, so that at 250 keV the necessary dose was an order of magnitude higher than that at 900 keV. In the region below 400 keV there was evidence of a dependence of the dose-to-amorphization on the orientation of the sample with respect to the electron beam. The results can be analyzed in terms of a composite displacement cross section dominated at high energies by displacements of Zr and Fe atoms, by displacements of Fe atoms at intermediate energies and of secondary displacements of lattice atoms by recoil impurities at low energies.

scholarly journals Experimental Studies of Few-nucleon Systems at Intermediate Energies

2014 ◽  
Vol 55 (8-10) ◽  
pp. 627-631
Author(s):  
E. Stephan ◽  
St. Kistryn ◽  
N. Kalantar-Nayestanaki
Keyword(s):  
Experimental Studies ◽  
Intermediate Energies

scholarly journals Characteristics of air showers with energy more than 1017 eV reconstructed by the Yakutsk array radio emission measurements

2019 ◽  
Vol 208 ◽  
pp. 08017
Author(s):  
Stanislav Knurenko ◽  
Igor Petrov
Keyword(s):  
Radio Emission ◽  
Energy Region ◽  
Air Showers ◽  
Mixed Composition ◽  
Yakutsk Array ◽  
Air Shower ◽  
High Energies ◽  
Shower Development ◽  
Region 10 ◽  
Maximum Development

The paper presents results on the longitudinal development of air showers of ultra-high energies obtained from radio emission measurements at the Yakutsk array. The energy, the depth of maximum development of individual showers are determined and a statistical analysis of Xmax in order to estimate the fluctuation of air shower development σ(Xmax) in the energy region 1017-1018 eV is performed. It is shown that σ(Xmax) in the energy region 1017-1018 eV is equal to 50-60 g·cm-2, which doesn’t contradict with a mixed composition of cosmic rays - protons and helium nuclei. This is also indicated by data of the Xmax value dependence on energy.

scholarly journals Analyzing observations of molecules in the ISM: Theoretical and experimental studies of energy transfer

2012 ◽  
Vol 58 ◽  
pp. 267-270 ◽  
Author(s):  
L. Wiesenfeld ◽  
A. Faure ◽  
F. Lique ◽  
N. Dumouchel ◽  
N. Feautrier ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Experimental Studies

Molecular Movements and Dynamics in Solutions Studied by Fluorescence Depolarization Measurement

1993 ◽  
Vol 58 (2) ◽  
pp. 213-233 ◽  
Author(s):  
Zuzana Limpouchová ◽  
Karel Procházka ◽  
Vlastimil Fidler ◽  
Jiří Dvořák ◽  
Bohumil Bednář
Keyword(s):  
Energy Transfer ◽  
Rotational Diffusion ◽  
Experimental Studies ◽  
Theoretical Models ◽  
Reorientational Motion ◽  
Fluorescence Depolarization ◽  
Time Resolved ◽  
Langevin Model ◽  
Theoretical Predictions ◽  
Media Systems

Theories allowing interpretation of the results of time-resolved polarization spectrofluorimetry in solutions are reviewed and their applicability under various conditions is discussed. For the reorientation of rigid molecules in an isotropic medium, the most frequently employed models are presented, such as rotational diffusion model, the Fokker-Planck-Langevin model, etc. Systems with internal rotation, systems in anisotropic media, systems with a complex electron relaxation and systems with energy transfer are discussed as examples of more complex systems. A special attention is devoted to the polarization fluorimetry of probes bound to/or sorbed at polymer and biopolymer chains. The review focuses on theoretical models of reorientational motion for interpretation of fluorescence anisotropy decays. Experimental studies and computer simulations are discussed only when it is necessary for comparison with theoretical predictions. Complicated models for simultaneous reorientational motion and energy transfer, solvent relaxation, etc., although very important for many applications, exceed the scope of this review and are mentioned only very briefly.

Surface phonon dispersion curves of graphite (0001) over the entire energy region

1988 ◽  
Vol 65 (12) ◽  
pp. 1601-1604 ◽  
Author(s):  
C. Oshima ◽  
T. Aizawa ◽  
R. Souda ◽  
Y. Ishizawa ◽  
Y. Sumiyoshi
Keyword(s):  
Energy Region ◽  
Phonon Dispersion ◽  
Dispersion Curves ◽  
Phonon Dispersion Curves ◽  
Surface Phonon ◽  
Entire Energy
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