Nonmonotonic Target Dependence of ClKX-Ray-Production Cross Sections in Single Heavy-Ion-Atom Collisions

1973 ◽  
Vol 31 (22) ◽  
pp. 1344-1347 ◽  
Author(s):  
Loren Winters ◽  
James R. Macdonald ◽  
Matt D. Brown ◽  
Tang Chiao ◽  
Louis D. Ellsworth ◽  
...  
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
Heavy Ion

MATRIX EFFECTS ON K-SHELL IONIZATION CROSS SECTIONS IN Al/Si ALLOYS

2002 ◽  
Vol 12 (01n02) ◽  
pp. 1-5
Author(s):  
M. NEKAB ◽  
Ch. HEITZ
Keyword(s):  
Cross Sections ◽  
Matrix Effects ◽  
Production Cross ◽  
Heavy Ion ◽  
Double Scattering ◽  
Scattering Mechanism ◽  
Ionization Cross ◽  
X Ray ◽  
Ionization Cross Sections ◽  
Shell Ionization

Thick targets consisting in Al/Si alloys were bombarded with 1.0 to 5.0 MeV Ar ions. The K X-ray production cross sections were deduced from the measured yields by using the Merzbacher-Lewis formula extended to heavy ion bombardment. The density dependence on the K X-ray production cross sections of Al and Si was observed. This phenomena can be interpreted within the molecular orbital double-scattering mechanism.

Double-differential heavy-ion production cross sections

2004 ◽  
Vol 110 (1-4) ◽  
pp. 53-56 ◽  
Author(s):  
T. M. Miller ◽  
L. W. Townsend
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
Heavy Ion ◽  
Ion Production

FRAGMENTATION CROSS SECTIONS IN HEAVY ION COLLISIONS

2008 ◽  
Vol 17 (09) ◽  
pp. 1927-1936
Author(s):  
BAO-AN BIAN ◽  
FENG-SHOU ZHANG ◽  
HONG-YU ZHOU
Keyword(s):  
Cross Sections ◽  
Langevin Equation ◽  
Heavy Ion Collisions ◽  
Production Cross ◽  
Heavy Ion ◽  
Ion Collisions ◽  
Target Mass

The fragment cross sections are calculated for reactions of Ne collisions with C , Al , Cu , Sn , Ta , and Pb targets at 600 Mev/nucleon using the the isospin-dependent Boltzmann-Langevin equation. We found that the production cross sections for fragments Z = 2 to 9 are qualitatively reproduced by the present calculations except for C target. In order to understand the effects of heavy ion interaction with biomolecules well, we calculate the fragmentation cross sections for reactions of 12 C + 2 H , 12 C , 14 N , 16 O at beam energies from 50 to 100 MeV/nucleon. It is found that fragment species increase approximately with increasing target mass. The obvious increment of the fragment cross sections for heavier targets at the beam energies from 50 to 80 MeV/nucleon are shown.

SIGMA MESON PRODUCTION IN HEAVY ION COLLISIONS AT INTERMEDIATE ENERGIES

2007 ◽  
Vol 22 (32) ◽  
pp. 6219-6226
Author(s):  
PORNRAD SRISAWAD ◽  
YU-MING ZHENG ◽  
CHRISTIAN FUCHS ◽  
AMAND FAESSLER ◽  
YUPENG YAN ◽  
...  
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
Meson Production ◽  
Heavy Ion ◽  
Mass Shift ◽  
Quantum Molecular Dynamics ◽  
Final State ◽  
Intermediate Energies ◽  
Simulation Results ◽  
Proton Induced Reactions

The production of the sigma (σ) meson is investigated in the quantum molecular dynamics model for the p+A reactions with the nuclei A being 12 C , 40 Ca and 208 Pb at the incident proton energies Ep = 1.50 GeV . The simulation results indicates a distinctive A dependence of the sigma production, that is, the increase of A is followed by an increase of the production cross-sections. The σ meson production in proton induced reactions is strongly medium-dependent, and the produced σ mesons decaying in a denser medium experience a stronger mass shift towards lower masses. This mass shift is an experimentally accessible observable in the final state pion pairs which did not suffer reabsorption by the surrounding nucleons. It is pointed out that the ratio of the simulation results of measurable σ mesons (in the form of two pions) cross-sections as a function of the sigma invariant-mass from various reactions opens the possibility to address experimentally the mass shift of the σ in a dense nuclear environment.

scholarly journals Secondary Neutron-Production Cross Sections from Heavy-Ion Interactions between 230 and 600 MeV/Nucleon

2007 ◽  
Vol 157 (2) ◽  
pp. 142-158 ◽  
Author(s):  
L. Heilbronn ◽  
C. J. Zeitlin ◽  
Y. Iwata ◽  
T. Murakami ◽  
H. Iwase ◽  
...  
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
Heavy Ion ◽  
Neutron Production ◽  
Secondary Neutron ◽  
Ion Interactions

PRODUCTION OF FISSION-LIKE EVENTS AFTER COMPLETE AND/OR INCOMPLETE FUSION OF 16O WITH 159Tb AND 169Tm AT E/A ≈ MeV

2008 ◽  
Vol 17 (03) ◽  
pp. 549-566 ◽  
Author(s):  
PUSHPENDRA P. SINGH ◽  
B. P. SINGH ◽  
BHAVNA SHARMA ◽  
UNNATI ◽  
MANOJ K. SHARMA ◽  
...  
Keyword(s):  
Cross Sections ◽  
Composite System ◽  
Production Cross ◽  
Heavy Ion ◽  
Incomplete Fusion ◽  
New Delhi ◽  
Sr Isotopes ◽  
Fusion Reactions ◽  
Nuclear Particle ◽  
Induced Fission

With a view to study heavy-ion induced fission after complete and/or incomplete fusion reactions, experiments have been performed at the Inter-University Accelerator Center (IUAC), New Delhi, India. The production cross-sections for more than 40 fission-like events (25 ≤ Z ≤ 45) produced in 16 O +159 Tb and 16 O +169 Tm systems, respectively, at E/A = 5.6 and 5.9 MeV have been measured using the recoil-catcher technique followed by off-line γ-spectroscopy. The analysis of the data indicates that fission is one of the competing modes of de-excitation of excited composite system formed via complete and/or incomplete fusion processes, where the evaporation of light nuclear particle(s) are more likely to be expected. Attempts have also been made to study isotopic yield distributions of Yttrium (83, 84m, 85, 87m Y ) and Strontium (80, 81, 83, 85m Sr ) isotopes in 16 O +159 Tb system, and Indium (105, 107, 108, 110 In ) and Technetium (99m, 101, 104, 105 Tc ) isotopes in 16 O +169 Tm system. The statistical analysis of the isotopic yield distribution has also been carried out to determine the most probable values of mass and charge of fission-like events in two systems.

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