SOME ANALYSIS OF HADRON–NUCLEON COLLISIONS AT HIGH ENERGY INELASTIC INTERACTIONS IN PHOTO-EMULSION

2002 ◽  
Vol 17 (26) ◽  
pp. 1693-1699
Author(s):  
S. M. ABD EL-HALIM
Keyword(s):  
Cross Sections ◽  
Nuclear Emulsion ◽  
Production Cross ◽  
High Energy ◽  
Reaction Cross ◽  
Multiparticle Production ◽  
Incident Momentum ◽  
Multiplicity Distributions ◽  
Pseudorapidity Distributions ◽  
Reaction Cross Sections

The interaction of 400 GeV/c protons and 340 GeV/c π- with nucleons in nuclear emulsion has been investigated. The interaction mean free paths (m.f.p.) and the corresponding reaction cross-sections (σ in ) have been found, the multiplicity distributions for the events with Nh = 0 (clean events) are measured and studied as well as the angular and pseudorapidity distributions. Finally the coherent multiparticle production cross-sections (σ coh ) were estimated and compared with other data, where it was found to be increasing slowly with increasing incident momentum for protons while it increases rapidly with increasing π--momentum.

STRUCTURE AND REACTIONS OF NEUTRON-RICH OXYGEN ISOTOPES

2012 ◽  
Vol 21 (10) ◽  
pp. 1250083 ◽  
Author(s):  
M. RASHDAN
Keyword(s):  
Cross Sections ◽  
Mean Field ◽  
High Energy ◽  
Reaction Cross ◽  
Glauber Model ◽  
Medium Effects ◽  
Halo Structure ◽  
Density Distributions ◽  
Optical Limit ◽  
Reaction Cross Sections

The structure of 16-26 O is investigated within the relativistic mean field (RMF) as well as high-energy nuclear collisions. The reaction cross-sections of 16-24 O +12 C around 1 GeV are calculated within the multiple scattering theory, where the multiple integrals are evaluated by Monte Carlo method as well as by the optical limit approximation of the Glauber model. In-medium effects are investigated within the optical limit, where it is found to be important in order to get reliable information about nuclear radii and density distributions. The reaction cross-sections indicate to a halo structure for 23 O . This neutron halo is also found in the rms matter radii and nuclear densities especially when Fermi shape is used in the optical limit, including in-medium effects, in extracting the parameters of the density distributions from the experimental reaction cross-sections.

scholarly journals Measurement of (n, xnγ) reaction Cross-sections on natural lead using in-beam gamma-Ray spectroscopy

2003 ◽  
Vol 18 (1) ◽  
pp. 22-30 ◽  
Author(s):  
Mila Pandurovic ◽  
Strahinja Lukic ◽  
Paule Baumann ◽  
Stpehane Hilaire ◽  
Jasmina Jeknic ◽  
...  
Keyword(s):  
Cross Sections ◽  
Nuclear Reactor ◽  
Gamma Ray ◽  
Nuclear Data ◽  
High Energy ◽  
Reaction Cross ◽  
Universal Method ◽  
Reactor Technology ◽  
Starting Point ◽  
Reaction Cross Sections

New concepts in nuclear reactor technology require precise neutron reaction data in the intermediate and high energy range. At present, experimental and evaluated nuclear data, particularly for (n, xn) reactions, are very scarce. Moreover, real discrepancies exist between different databases. The lack of experimental data is essentially due to the difficulty of measuring (n, xn) reactions. No universal method applicable to all isotopes exists. One of the possible methods is the in-beam y-ray spectroscopy and neutron time of flight technique on white neutron beams. In this way one actually directly measures (n, xny) reaction cross-sections. These serve as a starting point in the subsequent derivation of (n, xn) reaction cross-sections using nuclear models. This method was applied with a natural lead sample at me GELLNA white neutron beam facility in Geel, Belgium.

High-energy reaction cross sections of light nuclei

1989 ◽  
Vol 39 (3) ◽  
pp. 1154-1157 ◽  
Author(s):  
G. F. Bertsch ◽  
B. A. Brown ◽  
H. Sagawa
Keyword(s):  
Cross Sections ◽  
High Energy ◽  
Reaction Cross ◽  
Light Nuclei ◽  
High Energy Reaction ◽  
Energy Reaction ◽  
Reaction Cross Sections

scholarly journals Investigation of 54Fe(n,γ)55Fe and 35Cl(n, γ)36Cl reaction cross sections at keV energies by Accelerator Mass Spectrometry

2020 ◽  
Vol 232 ◽  
pp. 02005
Author(s):  
Zuzana Slavkovská ◽  
Anton Wallner ◽  
René Reifarth ◽  
Stefan Pavetich ◽  
Lukas Bott ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Cross Sections ◽  
Accelerator Mass Spectrometry ◽  
High Energy ◽  
Reaction Cross ◽  
Reaction Products ◽  
Institute Of Technology ◽  
Karlsruhe Institute ◽  
Reaction Cross Sections ◽  
Capture Cross Sections

Activations with neutrons in the keV energy range were routinely performed at the Karlsruhe Institute of Technology (KIT) in Germany in order to simulate stellar conditions for neutron-capture cross sections. A quasi-Maxwell-Boltzmann neutron spectrum of kT = 25 keV, being of interest for the astrophysical s-process, was produced by the 7Li(p,n) reaction utilizing a 1912 keV proton beam at the Karlsruhe Van de Graaff accelerator. Activated samples resulting in long-lived nuclear reaction products with half-lives in the order of yr 100 Myr were analyzed by Accelerator Mass Spectrometry (AMS). Comparison of the obtained reaction cross sections to literature data from previous Time-of-Flight (ToF) measurements showed that the selected AMS data are systematically lower than the ToF data. To investigate this discrepancy, 54Fe(n,γ)55Fe and 35Cl(n,γ)36Cl reaction cross sections were newly measured at the Frankfurt Neutron Source (FRANZ) in Germany. To complement the existing data, an additional neutron activation of 54Fe and 35Cl at a proton energy of 2 MeV was performed. The results will give implications for the stellar environment at kT = 90 keV, reaching the not yet experimentally explored high-energy s-process range. AMS measurements of the activated samples are scheduled.

scholarly journals Reaction Cross Section of Heavy Projectiles Using Coulomb Modified Glauber Model

2019 ◽  
Vol 201 ◽  
pp. 03001
Author(s):  
N. Marimuthu ◽  
V. Singh ◽  
S. S. R. Inbanathan
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Reaction Cross Section ◽  
Nuclear Emulsion ◽  
Reaction Cross ◽  
Inelastic Collisions ◽  
Medium Effect ◽  
Glauber Model ◽  
Reaction Cross Sections ◽  
Calculated Average

We investigated reaction cross section and inelastic collisions of the wide number of projectile and target nuclei using the Coulomb Modified Glauber Model (CMGM). The total reaction cross sections were calculated with and without accounting for in-medium effect for various heavy projectiles such as 56Fe26, 84Kr36, 132Xe54, 197Au79 and 238U92 that interact with Nuclear Emulsion Detector’s (NED) nuclei at incident energies at around 1 GeV/n. The calculated average values of reaction cross section are compared with the corresponding experimental data.

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