Measurement of energy spectra of secondary protons behind thick lead absorber during irradiation with 635-MeV protons

1978 ◽  
Vol 45 (3) ◽  
pp. 929-930
Author(s):  
A. Ya. Serov ◽  
B. S. Sychev
Keyword(s):  
Energy Spectra ◽  
Lead Absorber ◽  
Mev Protons ◽  
Thick Lead

Energy spectra of forward-ejected electrons in multiple ionization of Ar by 1 MeV protons

2000 ◽  
Vol 33 (20) ◽  
pp. 4237-4242 ◽  
Author(s):  
V V Afrosimov ◽  
A A Basalaev ◽  
B Fastrup ◽  
E Horsdal-Pedersen ◽  
K V Kashnikov ◽  
...  
Keyword(s):  
Energy Spectra ◽  
Multiple Ionization ◽  
Mev Protons

Energy spectra of 50-keV to 20-MeV protons accelerated at corotating interaction regions at Ulysses

1999 ◽  
Vol 104 (A4) ◽  
pp. 6705-6719 ◽  
Author(s):  
M. I. Desai ◽  
R. G. Marsden ◽  
T. R. Sanderson ◽  
D. Lario ◽  
E. C. Roelof ◽  
...  
Keyword(s):  
Energy Spectra ◽  
Corotating Interaction Regions ◽  
Interaction Regions ◽  
Mev Protons

Energy spectra and depth-dose curves for 70 MeV protons

2009 ◽  
Vol 36 (S23) ◽  
pp. 565-574 ◽  
Author(s):  
Hans Bichsel ◽  
T. Hiraoka
Keyword(s):  
Energy Spectra ◽  
Depth Dose ◽  
Mev Protons

scholarly journals Simulation Study of Energy Resolution of the Electromagnetic Shashlyk Calorimeter for Different of Layers and Absorber Combinations

2020 ◽  
Keyword(s):  
Energy Range ◽  
Energy Resolution ◽  
Critical Energy ◽  
Energy Spectra ◽  
Electromagnetic Calorimeter ◽  
Careful Selection ◽  
Hadron Structure ◽  
Lead Absorber ◽  
Nica Collider ◽  
Calorimeter Tower

The response simulation of an ideal KOPIO-type electromagnetic sampling calorimeter was carried out in the energy range of 50 MeV – 16 GeV using Geant4-10.6.0 toolkit. In this work, we obtained energy resolution parameters for prototypes of Shashlyk calorimeter modules (ECAL SPD) of the NICA collider SPD setup for different thicknesses of a lead absorber with different numbers of layers. The NICA scientific experiment provides a unique opportunity to study parton distributions and correlations in hadron structure when working with high-intensity polarized relativistic ion beams. The ECAL electromagnetic calorimeter is one of the key detectors of the SPD device. There are some preliminary requirements for an electromagnetic calorimeter, in particular, for energy resolution in the energy range from 50 MeV to 16 GeV. It has been shown in detail that a more accurate obtaining of stochastic as well as permanent coefficients acting as parameters of the energy resolution parameterization formula is possible when longitudinal energy leakages from the calorimeter tower are taken into account. Such leakages are always present even in small amounts. Thus, the energy resolution parameterization of an ideal sampling calorimeter with a good χ 2/ndf value is fitted with function of the type: σE/E=(a/√E) (+)b(+)(p1ln1E+ p2ln2E + p3ln3E ) , where the logarithm lnE means ln(E/Ec), where Ec is the effective critical energy. Based on the results of detailed modeling, the dependence of these parameters on the number of calorimeter plates and absorber thicknesses was found. The approach is based on careful selection and analysis of the energy spectra obtained by modeling according to the χ-square criterion and an adequate choice of the approximation functions of the energy resolution. The methods proposed in this paper can be easily extended to other combinations of absorber-scintillator thicknesses.

PROTON INDUCED X-RAY EMISSION ANALYSIS OF TRACE ELEMENTS IN THICK BREAD SAMPLES

2009 ◽  
Vol 19 (03n04) ◽  
pp. 133-141 ◽  
Author(s):  
MOHAMED BAKER AL-BEDRI ◽  
IKRAM JAMEEL ABDUL GHANI ◽  
IBRAHIM ABDUL RAHMAN AL-AGHIL
Keyword(s):  
Trace Elements ◽  
Quantitative Analysis ◽  
Elemental Concentration ◽  
Energy Spectra ◽  
Emission Analysis ◽  
X Ray ◽  
Reference Concentration ◽  
Mev Protons ◽  
Cu And Zn

Proton induced X-ray emission (PIXE) technique has been used for identification and quantitative analysis of the elemental concentration in thick bread samples. Bread samples were air-oven dried at 60 oC and milled in a clean agate mortar to homogenize the sample and pressed into a pellet. PIXE technique relies on the analysis of the energy spectra of the characteristic X-ray emitted from the thick bread sample and the orchard leaf standard (NIST- SRM -1571) bombarded with 2.0 MeV protons. The concentration of the elements ( Cl , K , Ca , Mn , Fe , Cu , and Zn ) in the bread samples was determined by comparison with NIST orchard leaf standard. The accuracy of the measurements ranged between ± 2% and ± 10% for the most elements detected in this method. The aim of this study is to establish the reference concentration of trace elements in the Iraqi bread using PIXE technique.

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