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Effect Of Free Particle Collisions In High Energy Proton And Pion Induced Nuclear Reactions
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Book Synopsis The Effect of Free-particle Collisions in High Energy Proton and Pion-induced Nuclear Reactions by : Norman Peara Jacob
Download or read book The Effect of Free-particle Collisions in High Energy Proton and Pion-induced Nuclear Reactions written by Norman Peara Jacob and published by . This book was released on 1975 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Free-particle Collisions in High Energy Proton and Pion-induced Nuclear Reactions by :
Download or read book Effect of Free-particle Collisions in High Energy Proton and Pion-induced Nuclear Reactions written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of free-particle collisions in simple ''knockout'' reactions of the form (a, aN) and in more complex nuclear reactions of the form (a, X) was investigated by using protons and pions. Cross sections for the $sup 48$Ti(p,2p)47Sc and the 74Ge(p,2p)73Ga reactions were measured from 0.3 to 4.6 GeV incident energy. The results indicate a rise in (p,2p) cross section for each reaction of about (25 +- 3) percent between the energies 0.3 and 1.0 GeV, and are correlated to a large increase in the total free-particle pp scattering cross sections over the same energy region. Results are compared to previous (p,2p) excitation functions in the GeV energy region and to (p,2p) cross section calculations based on a Monte Carlo intranuclear cascade-evaporation model. Cross section measurements for ([pi]/sup +-/, [pi]N) and other more complex pion-induced spallation reactions were measured for the light target nuclei 14N, 16O, and 19F from 45 to 550 MeV incident pion energy. These measurements indicate a broad peak in the excitation functions for both ([pi], [pi]N) and ([pi], X) reactions near 180 MeV incident energy. This corresponds to the large resonances observed in the free-particle [pi]p and [pi]−p cross sections at the same energy. Striking differences in ([pi], [pi]N) cross section magnitudes are observed among the light nuclei targets. The experimental cross section ratio sigma([pi]−, [pi]−n)/ sigma($pi$$sup +$, $pi$N) at 180 MeV is 1.7 +- 0.2 for all three targets. The experimental results are compared to previous pion and analogous proton-induced reactions, to Monte Carlo intranuclear cascade-evaporation calculations, and to a semi-classical nucleon charge exchange model. (108 references) (auth).
Book Synopsis Nuclear Reactions Induced by Pions and Protons by : Paul Lorenz Reeder
Download or read book Nuclear Reactions Induced by Pions and Protons written by Paul Lorenz Reeder and published by . This book was released on 1962 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nuclear Reactions Induced by Pions and Protons (thesis). by :
Download or read book Nuclear Reactions Induced by Pions and Protons (thesis). written by and published by . This book was released on 1962 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Effects due to elementary particle-like collisions within nuclear matter have been observed in several nuclear reactions caused by pions and protons. Simple nuclear reactions of the form ZA(a, an)Z/sup A-1/ and Z/sup A/(a, ap)(Z-1)/ sup A-1/ have excitation functions that are sensitive to changes in the elementary-particle cross sections. The excitation function for the reaction C/ sup 12/(pi /sup -/, pi /sup -/n)C/sup 11/ is measure d from 53 to 1610 Mev by bombarding targets of plastic scintillator with pions. The intensity of the pion beam is monitored with a two-counter telescope and 40 Mc scaling system. The scintillator target is mounted on a phototube and becomes the detector for the carbon-11 positron activity. Corrections are made for muon contamination in the beam, coincidence losses in the monitor system, carbon-11 activity produced by stray background at the accelerator, carbon-1l activity produced by secondaries in the target, and the efficiency of the carbon-11 detection system. The C/sup 12/(pi /sup -/, pi /sup -/n)C/sup 11/ cross sections rise to a peak of abo ut 70 mb at 190 Mev, that corresponds to the resonance in freeparticle pi /sup -/n scattering at 190 Mev. Calculations based on a knock-on'' collision mechanism and sharp-cutoff nuclear density reproduce the shape of the experimental excitation function, but the magnitudes of the calculated values are low by a factor of six, The calculation shows that the C/sup 12/(pi /sup -/, pi /sup -/ n)C/sup 11/ reaction occurs in the nuclear s urface region at all bombarding energies, The contributions to the (pi /sup -/, pi /sup -/n) reaction predominate on the front surface of the nucleus in order to give the pion the maximum probability of escaping. The excitation functions for the reactions ured radiochemically from 400 Mev to 6.2 Bev. The slight increase in the (p,2p) cross sections measured from 400 to 720 Mev is related to the occurrence of a quasi- free-particle pp colliaion within the nucleus. Due to the proton momentum distribution, the increase is not as pronounced as the rise in freeparticle pp total cross sections from 400 to 1000 Mev. From 2.2 to 8.2 Bev, the Zn/sup 68/ (p,2p)Cu/sup 67/ and Fe/sup 67/(p,2p)Mn/sup 5 cross sections are constant at 21 plus or minus 2 mb and 50 plus or minus 8 mb, respectively. The difference in magnitudes of the (p,2p) cross sections is ascribed to the availability of only two protons in zinc-68 and of six protons in iron-57 for this particular reaction. The free-particle effects are not seen in more complex reactions as evidenced by the constant cross sections from 0.72 to 6.2 Bev for the yields of manganese-51 and -52 from the reactions of protons with iron and for the yields of copper-61 and -84 from the reactions of protons with zinc. Cross sections are presented for a few products from pion-induced reactions requiring several nucleons to be emitted. The yields of manganese-58 and -52 and iron-52 from the bombardment of natural copper by negative pi meson, the yields of copper-67, -61, and -64 and manganese-52 and -56 from the negative pi meson bombardment of natural zinc, and the cross section for sodium-24 from negative pi meson + aluminum-27 are compared to the yields for similar reactions induced by protons. At the high energies considered here, interaction of negative pi meson with these targets is shown to give yields that are of the same order of magnitude as the yields from proton reactions. These results are interpreted as experimental evidence that pion processes are very important for energy transfer in high-energy nuclear reactions. 99 references. (auth).
Book Synopsis ERDA Energy Research Abstracts by : United States. Energy Research and Development Administration
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Energy Research and Development Administration. Technical Information Center Publisher : ISBN 13 : Total Pages :588 pages Book Rating :4.3/5 (129 download)
Book Synopsis ERDA Energy Research Abstracts by : United States. Energy Research and Development Administration. Technical Information Center
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1976 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1976 with total page 1022 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ERDA Research Abstracts by : United States. Energy Research and Development Administration
Download or read book ERDA Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book INIS Atomindex written by and published by . This book was released on 1980 with total page 1692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1983 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New Aspects of High-Energy Proton-Proton Collisions by : A. Ali
Download or read book New Aspects of High-Energy Proton-Proton Collisions written by A. Ali and published by Springer. This book was released on 1988 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Articles focus on the planned European proton-proton collider, and concentrate on physics issues, rather than the more technical concerns addressed in the three previous workshops. The use of energies much higher than those of the American Superconducting Super Collider is featured. Topics include reviews of current projects, hadron collisions, lep
Book Synopsis High Energy Proton Production in Medium Energy Nuclear Reactions by : Kathryn Ryan Cordell
Download or read book High Energy Proton Production in Medium Energy Nuclear Reactions written by Kathryn Ryan Cordell and published by . This book was released on 1979 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Collisions of High-energy Nuclear Particles with Nuclei by : B. J. Moyer
Download or read book Collisions of High-energy Nuclear Particles with Nuclei written by B. J. Moyer and published by . This book was released on 1950 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Energy and Target Dependence of the Pseudo-rapidity Distributions in Pion- and Proton-nucleus Collisions at Fermilab Energies by :
Download or read book Energy and Target Dependence of the Pseudo-rapidity Distributions in Pion- and Proton-nucleus Collisions at Fermilab Energies written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiparticle production in hadron-nucleus collisions has been studied using hodoscope arrays. Data on angular distributions were collected for incident .pi./sup + -/, K/sup + -/, and P/sup + -/ at 50, 100, and 200 GeV with targets ranging from hydrogen through uranium. The extent in pseudo-rapidity of particles produced in the target fragmentation region increases with energy. Proton and pion induced reactions exhibit different behavior for the same target nucleus. However, for target nuclei with identical values of .nu.bar, (where .nu.bar is the average thickness in units of the mean free path of the incident particle) the behavior is similar. Pseudo-rapidity distributions are compared with theoretical models.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1991 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1984 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: