Development of Neutron Personal Monitoring System BasedonCR-39 Solid State Nuclear Track Detector PDF Download
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Author: H. K. Kundu
Publisher:
ISBN:
Category :
Languages : en
Pages : 38
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Book Description
Author: H. K. Kundu
Publisher:
ISBN:
Category :
Languages : en
Pages : 38
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Book Description
Author:
Publisher:
ISBN:
Category : Radiation dosimetry
Languages : en
Pages : 28
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Author: James Scott Durham
Publisher:
ISBN:
Category :
Languages : en
Pages : 964
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Author: William Alan Poluha
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ISBN:
Category : Dosimeters
Languages : en
Pages : 184
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Author: Rupali Pal
Publisher:
ISBN:
Category : Radiation dosimetry
Languages : en
Pages : 32
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Author: Seungjae Han
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ISBN:
Category :
Languages : en
Pages : 202
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Author: Patrick Morgan Stafford
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Category :
Languages : en
Pages : 464
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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CR-39 Polymer, a new solid state track recorder with unprecedented sensitivity to lightly ionizing particles (such as protons) is being developed for eventual neutron dosimetry applications in the Fusion Materials Irradiation Test Facility and elsewhere. The diameters of proton tracks have been found to vary smoothly and reproducibly as a function of energy from 0.20 to 18.0 MeV. Preliminary results on the response of CR-39 polymer to proton tracks as a function of angle show a rapid decrease of the registration efficiency from 100% to 0 for angles of incidence less than 75°. Proton recoil track size distributions in CR-39 polymer irradiated with monoenergetic neutrons of varying energy are presented. Some proposed high energy neutron dosimetry and radiography systems using CR-39 polymer are discussed.
Author: Timmy Joe Less
Publisher:
ISBN:
Category :
Languages : en
Pages : 124
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Author: Emily E Kading
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Category : Electronic dissertations
Languages : en
Pages :
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The Primordial Lithium problem of Big Bang Nucleosynthesis (BBN), a prediction of 7Li abundance which is considerably larger than observed, has important implications for the standard model of cosmology. Since 7Li is produced by the later decay of 7Be it is important to study the destruction of 7Be during the epoch of BBN, in order to examine possible reduction of the predicted abundance of 7Li, in particular the destruction of 7Be with neutrons. The high flux of 50 keV epithermal neutrons (1010 n/sec/cm2) produced by a Liquid Lithium (LiLiT) target at the Soreq Applied Research Accelerator Facility (SARAF) in Yavne, Israel offers opportunities for research at BBN energy. Due to the high intensity of the neutron flux at SARAF, background can be overwhelming for spectroscopic detectors. The plastic polymer CR-39 (poly allyl diglycol carbonate - PADC, C12H18O7) was chosen as a detector that can withstand the high neutron and associated gamma-ray flux. CR-39 Nuclear Track Detectors (NTD) have been calibrated for detection of alpha-particles and protons in a high neutron flux environment. These detectors can be used to detect damage caused by ionizing radiation on the plastic through a process of chemical etching. Charged particles leave behind a trademark path of chemical bonds broken by incoming ionized radiation. After chemical etching, the broken bonds are visible under a microscope in the form of circular pits. A segmentation algorithm was developed using ImageJ/FIJI to analyze the pits and calibrate the detectors for use in the 7Be and neutron experiment at SARAF.
