Measurements of Proton-Proton and Proton-Iron Inelastic Cross Sections Using Charged Cosmic Ray Hadrons of Energy Greater Than 70c2v PDF Download
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Author: Gordon Dean DeMeester
Publisher:
ISBN:
Category :
Languages : en
Pages : 170
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Book Description
Author: Gordon Dean DeMeester
Publisher:
ISBN:
Category :
Languages : en
Pages : 170
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Book Description
Author: Gordon Dean DeMeester
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ISBN:
Category : Inelastic cross sections
Languages : en
Pages : 161
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Author: BILLY WEI-YU LOO
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ISBN:
Category :
Languages : en
Pages : 201
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Author: Albert Laighton Osterheld
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ISBN:
Category :
Languages : en
Pages : 264
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Author: Lauren Alexandra Tompkins
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ISBN:
Category :
Languages : en
Pages : 356
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The first measurement of the inelastic cross-section for proton-proton collisions at a center of mass energy of 7 TeV using the ATLAS detector at the Large Hadron Collider is presented. From a dataset corresponding to an integrated luminosity of 20 inverse microbarns, events are selected by requiring activity in scintillation counters mounted in the forward region of the ATLAS detector. An inelastic cross-section of 60.1 +/- 2.1 millibarns is measured for the subset of events visible to the scintillation counters. The uncertainty includes the statistical and systematic uncertainty on the measurement. The visible events satisfy [xi]> 5\times 10-6, where [xi]=MX2/s is calculated from the invariant mass, MX, of hadrons selected using the largest rapidity gap in the event. For diffractive events this corresponds to requiring at least one of the dissociation masses to be larger than 15.7~GeV. Using an extrapolation dependent on the model for the differential diffractive mass distribution, an inelastic cross-section of 69.1 +/- 2.4 (exp) +/- 6.9 (extr) millibarns is determined, where (exp) indicates the experimental uncertainties and (extr) indicates the uncertainty due to the extrapolation from the limited [xi]-range to the full inelastic cross-section.
Author: Lawrence W. Townsend
Publisher:
ISBN:
Category :
Languages : en
Pages : 58
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Author: Steve R. Blattnig
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Category : Particles (Nuclear physics)
Languages : en
Pages : 88
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Author:
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ISBN:
Category :
Languages : en
Pages : 30
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The inelastic hadronic cross section in proton-lead collisions at a centre-of-mass energy per nucleon pair of 5.02 TeV is measured with the CMS detector at the LHC. Our data sample, corresponding to an integrated luminosity of L = 12.6 ± 0.4 nb-1, has been collected with an unbiased trigger for inclusive particle production. The cross section is obtained from the measured number of proton-lead collisions with hadronic activity produced in the pseudorapidity ranges 3
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 22
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Book Description
The inelastic hadronic cross section in proton-lead collisions at a centre-of-mass energy per nucleon pair of 5.02 TeV is measured with the CMS detector at the LHC. Our data sample, corresponding to an integrated luminosity of L = 12.6 ± 0.4 nb-1, has been collected with an unbiased trigger for inclusive particle production. The cross section is obtained from the measured number of proton-lead collisions with hadronic activity produced in the pseudorapidity ranges 3 ? 5 and/or -5 ? -3, corrected for photon-induced contributions, experimental acceptance, and other instrumental effects. The inelastic cross section is measured to be ?
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Category :
Languages : en
Pages : 16
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Cosmic rays penetrate the lunar surface and interact with the lunar rocks to produce both radionuclides and stable nuclides. Production depth profiles for long-lived radionuclides produce in lunar rocks are measured using Accelerator Mass Spectrometry (AMS). For a particular radionuclide these production depth profiles can be interpreted to give an estimate for the solar proton flux over a time period characterized by the half life of the radionuclide under study. This analysis is possible if and only if all the cross sections for the interactions of all cosmic ray particles with all elements found in lunar rocks are well known. In practice, the most important cross sections needed are the proton production cross sections, because 98% of solar cosmic rays and (approximately)87% of galactic cosmic rays are protons. The cross sections for the production of long-lived radionuclides were very difficult to measure before the development of AMS and only in recent years has significant progress been made in determining these essential cross sections. Oxygen and silicon are major constituents of lunar rocks. We have reported already 14C production cross sections from O and Si for proton energies 25-500 MeV, and O(p, x)1°Be from 58 160 MeV[6]. Here we present new measurements for the cross sections O(p, x)1°Be, O(p, x)7Be, Si(p, x)7Be, Si(p, x)26Al, and Si(p, x)22Na from (approximately)30 - 500 MeV.
