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  1. University of Mandalay
  2. Department of Physics

Determination of Density of Nuclear Emulsion Plate by using Range- Energy Relation Calibration Source

http://hdl.handle.net/20.500.12678/0000000704
http://hdl.handle.net/20.500.12678/0000000704
f0850da6-cdce-4974-8488-b622bc67f180
42c388b5-bbef-4fce-8e70-8e8c4d004915
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Determination Determination of Density of Nuclear Emulsion Plate by using Range- Energy Relat.pdf (862 Kb)
Publication type
Journal article
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Publication
Title
Title Determination of Density of Nuclear Emulsion Plate by using Range- Energy Relation Calibration Source
Language en
Publication date 2017
Authors
Khin Than Tint
Description
The density of nuclear emulsion plate is determined by using the alpha decays of thorium series, which is one of the range- energy relation calibration sources. We picked thorium series in the emulsion plate, Mod#64; Pl# 9, of KEK- E373 experiment. Five alpha decays from 228Th were observed in the decay chain of thorium series. Among the five α particles tracks, the α-particle from 212Po has higher energy than others and α-particle from 228Th, is observed a little distant from others, are used. We measured the position coordinates of the tracks of the α-particle by using microscope system. The range distribution is plotted as the squared length in the focusing direction, Δz2, versus the squared length in the direction perpendicular to it, Δx2 + Δy2. By fitting those data points with a straight line, we obtained the range of α particles as well as the shrinkage factor of nuclear emulsion. The range of α particles from 228Th is 23.358±0.263 μm. Using the average kinetic energy of α particles from 228Th of 5.400 MeV, the density of the emulsion is obtained by using range-energy program which is based on Barka’s equation, to be 3.745±0.042 g/cm3. On the other hand, for α particles from 212Po, kinetic energy 8.7MeV, is obtained as 48.464±0.355 μm, giving the emulsion density of 3.623±0.026 g/cm3. The density of the nuclear emulsion is determined from the mean of them, 3.684±0.049 g/cm3.
Keywords
Thorium series
Identifier https://umoar.mu.edu.mm/handle/123456789/374
Journal articles
Myingyan Degree College Research Journal
8
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