Exposure and etching time effects on the fission track density in CR-39 detectors using teeth samples

2022 ◽  
Author(s):  
Karar Mahdi Talib ◽  
Nada Farhan Kadhim ◽  
Ahmed Fadhil Mkhaiber
Keyword(s):  
Fission Track ◽  
Track Density ◽  
Etching Time ◽  
Time Effects ◽  
Cr 39 Detectors

Studies on the Responses of CR-39 Detector to C3+, O3+, and Proton Irradiations

2013 ◽  
Author(s):  
X. Du ◽  
S. H. Liu ◽  
J. H. Zhang ◽  
C. Q. Chen ◽  
X. T. Ren
Keyword(s):  
Track Density ◽  
Etching Time ◽  
Density Distributions ◽  
Measurement Results ◽  
Cr 39 Detectors

In the present study, CR-39 detectors with thickness of 1.0mm are irradiated respectively by C3+(10MeV, 20MeV, 20MeV), O3+(10MeV, 20MeV, 30MeV) particles and protons (5MeV) with ion fluences ranging from 1.0×107cm−2 to 5.0×109cm−2. The etching time conditions of the latent tracks for the different irradiation particles with different fluences described above are experimental studied. The curves for track density distributions with irradiation fluences of different energy particles are simulated. The suggested irradiation fluences ranges for the three types of particles detected with CR-39 detector are offered according to the measurement results.

Effects of Etching on Zircon Grains and its Implications for the Fission Track Method

2012 ◽  
Vol 66 (5) ◽  
pp. 545-551 ◽  
Author(s):  
Carlos Alberto Tello Sáenz ◽  
Eduardo Augusto Campos Curvo ◽  
Airton Natanael Coelho Dias ◽  
Cleber José Soares ◽  
Carlos José Leopoldo Constantino ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Crystal Lattice ◽  
Fission Track ◽  
Surface Characteristics ◽  
Optical Microscope ◽  
Etching Time ◽  
X Ray ◽  
Track Method ◽  
Zircon Fission Track ◽  
Natural Zircon

Studies of zircon grains using optical microscopy, micro-Raman spectroscopy, and scanning electron microscopy (SEM) have been carried out to characterize the surface of natural zircon as a function of etching time. According to the surface characteristics observed using an optical microscope after etching, the zircon grains were classified as: (i) homogeneous; (ii) anomalous, and (iii) hybrid. Micro-Raman results showed that, as etching time increases, the crystal lattice is slightly altered for homogeneous grains, it is completely damaged for anomalous grains, and it is altered in some areas for hybrid grains. The SEM (energy dispersive X-ray spectroscopy, EDS) results indicated that, independent of the grain types, where the crystallinity remains after etching, the chemical composition of zircon is approximately 33% SiO2:65% ZrO2 (standard natural zircon), and for areas where the grain does not have a crystalline structure, there are variations of ZrO2 and, mainly, SiO2. In addition, it is possible to observe a uniform surface density of fission tracks in grain areas where the determined crystal lattice and chemical composition are those of zircon. Regarding hybrid grains, we discuss whether the areas slightly altered by the chemical etching can be analyzed by the fission track method (FTM) or not. Results of zircon fission track and U-Pb dating show that hybrid and homogeneous grains can be used for dating, and not only homogeneous grains. More than 50 sedimentary samples from the Bauru Basin (southeast Brazil) were analyzed and show that only a small amount of grains are homogeneous (10%), questioning the validity of the rest of the grains for thermo-chronological evolution studies using zircon FTM dating.

Experimental evaluation of protons emission from a plasma focus device

2012 ◽  
Vol 78 (5) ◽  
pp. 507-513 ◽  
Author(s):  
M. BHUYAN ◽  
S. R. MOHANTY
Keyword(s):  
Plasma Focus ◽  
Proton Energy ◽  
Plasma Focus Device ◽  
Etching Time ◽  
Number Density ◽  
Pinched Plasma ◽  
Filter Thickness ◽  
Aluminum Filter ◽  
Cr 39 Detectors ◽  
Track Diameter

AbstractSolid state nuclear track detectors have been used for measuring axially emitted protons from a 2.2-kJ energy plasma focus device. The flux of the protons emerging out from the pinched plasma column of the plasma focus device has been found to saturate the CR-39 detectors. Aluminum filters have been used to avoid the saturation effect. By varying the aluminum filter thickness as well as the etching time of CR-39 detectors, proton tracks have been analyzed. Proton energy above 200 keV to about 1 MeV has been measured by using different thicknesses of aluminum filters. On increasing the etching hours, the most probable track diameter is found to be shifted from lower to higher values. The track number density decreases on increase of the filter thickness, whereas the track diameters increase linearly with respect to the etching time.

Fission track etching and annealing phenomenon in phlogopite and their applications

1978 ◽  
Vol 15 (12) ◽  
pp. 1924-1929 ◽  
Author(s):  
Rajinder Parshad ◽  
H. S. Saini ◽  
K. K. Nagpaul
Keyword(s):  
Fission Track ◽  
Uranium Concentration ◽  
Etching Time ◽  
Fission Tracks ◽  
Mean Values ◽  
Annealing Temperatures ◽  
Track Etching ◽  
Correction Curve ◽  
The Mean ◽  
Annealing Experiments

Systematic annealing experiments on fission tracks in phlogopite have been carried out under standard etching conditions to obtain the correction curve for the ages of phlogopite, which might have been lowered due to geological annealing of fossil fission tracks. Variation of fission track density with etching time at different annealing temperatures has been analysed in order to standardize the etching conditions. All the tracks in phlogopite are annealed by heating at 590 °C for 1 h. Extrapolation of experimental data suggests that a temperature of 215 °C would be required for 1 Ma to remove all the tracks. The corrected age of a phlogopite sample from Neyyur village, Kanya Kumari District, India, is 395 ± 20 Ma. The mean values of fission fragment range for induced 235U fission tracks, uranium concentration, activation energy, and an effective paleoisotherm for fission track clock in the Neyyur village phlogopite are 17.7 ± 2.0 μm, 3.12 × 10−9 g/g, 1.8 eV, and 150 °C, respectively.

scholarly journals Correlation between the Track Density and Absorbance of Alpha Particles using CR-39 Detectors from UV-Visible Spectrum

2019 ◽  
Vol 30 (2) ◽  
pp. 37-49 ◽  
Author(s):  
Ali Abdulwahab Ridha ◽  
◽  
Nada Farhan Kadhim ◽  
Nadheer Jasim Mohammed ◽  
◽  
...  
Keyword(s):  
Visible Spectrum ◽  
Alpha Particles ◽  
Track Density ◽  
Uv Visible ◽  
Cr 39 Detectors

scholarly journals Effects of Storage Time and Pre-Etching Treatment of CR-39 Detectors on Their Response to Alpha Radiation Exposure

2021 ◽  
Vol 18 (16) ◽  
pp. 8346
Author(s):  
Miroslaw Janik ◽  
Md. Mahamudul Hasan ◽  
Peter Bossew ◽  
Norbert Kavasi
Keyword(s):  
Carbon Dioxide ◽  
Storage Time ◽  
Alpha Particles ◽  
Hot Water ◽  
Evaluation Procedure ◽  
Etching Time ◽  
Nuclear Track Detectors ◽  
Carbon Dioxide Atmosphere ◽  
Track Area ◽  
Cr 39 Detectors

Radon passive monitors based on solid state nuclear track detectors (SSNTD), especially CR-39, are widely used in radon and thoron studies. They may be subjected to the influence of external factors, like changing of temperature, humidity, and pressure, both before and during the measurement. Evaluation of the exposed detectors involves chemical processing, whose conditions also influence the measurement results. The aim of this study was to check several factors, as to whether they may modify the response of CR-39 detector: concerning the phase before evaluation, storage time, and temperature during storage; and concerning the evaluation procedure, etching time, and pre-etching treatment using hot water and carbon dioxide atmosphere. Two experiments were conducted by irradiation of CR-39 detectors using alpha particles emitted from a mono-energetic 241Am source and exposed in radon atmosphere. Track density dependence of the age of production was found to be statistically not significant. On the other hand, pre-etching treatment using hot water and carbon dioxide with different etching times showed statistically significant effects on track area, track sensitivity, and roundness. It was concluded that there are simple methods to increase performance of nuclear track detectors, and that storage time is not a factor of concern.

scholarly journals Calibration of CR-39 solid state track detectors with monoenergetic protons from 0.3 MeV to 2.5 MeV

2020 ◽  
Vol 239 ◽  
pp. 07006
Author(s):  
Yangfan He ◽  
Xiaofeng Xi ◽  
Shilun Guo ◽  
Bing Guo ◽  
Changye He ◽  
...  
Keyword(s):  
Data Analysis ◽  
Big Bang ◽  
Etching Time ◽  
Massive Data ◽  
Tandem Accelerator ◽  
Big Bang Nucleosynthesis ◽  
Collisionless Plasmas ◽  
Laser Facility ◽  
The Big Bang ◽  
Cr 39 Detectors

The 2H(d,p)3H reaction is one of the most crucial reactions in the Big Bang nucleosynthesis (BBN). It is of particular interest to investigate this kind of reactions in plasma environments, generated by high intensity lasers, which are similar to real astrophysical conditions. We have experimentally investigated the 2H(d,p)3H reaction using laser-driven counter-streaming collisionless plasmas at the Shenguang-II laser facility. CR-39 track detectors are widely employed as the main diagnostics in such experiments and laser-driven ion acceleration. In this work, we performed calibration of CR-39 track detectors with monoenergetic protons from the tandem accelerator, and then presented their track diameters for proton energies ranging from 300 keV to 2.5 MeV and for etching times between 4 and 28 hours. In addition, we recommended the optimal etching time at the typical etching conditions, which will be very useful for the following massive data analysis from the CR-39 detectors.

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