Depth-dependence of the bulk etch rate of gamma-ray irradiated CR-39 track detector

2001 ◽  
Vol 34 (1-6) ◽  
pp. 85-89 ◽  
Author(s):  
T Yamauchi ◽  
H Ichijo ◽  
K Oda
Keyword(s):  
Etch Rate ◽  
Gamma Ray ◽  
Track Detector ◽  
Bulk Etch Rate ◽  
Depth Dependence

Evaluation of Bulk Etch Rate of Solid State Nuclear Track Detector CR-39

2015 ◽  
Vol 1107 ◽  
pp. 712-715
Author(s):  
Anees A. Al-Hamzawi ◽  
M.S. Jaffar ◽  
Nada F. Tawfiq ◽  
Murtadha Sh. Aswood
Keyword(s):  
Solid State ◽  
Etch Rate ◽  
Solution Concentration ◽  
Track Detector ◽  
Etching Time ◽  
Nuclear Track Detector ◽  
Bulk Etch Rate ◽  
Different Temperatures ◽  
Naoh Solution

In the current study, the bulk etch rate VBof solid state nuclear track detectors SSNTDs CR-39 have been examined at different concentrations of NaOH solution ranged from 4N to 8N and different temperatures of NaOH solution (50, 60, 70, 80°C) for various time intervals of etching (1-10 h); this is done by determination of mass variation via etching time. The results indicate that the bulk etch rate VBincreases with the increase of etchant solution concentration and the temperature of solution. This can be attributed to the increase the thickness of the removed layers h of the detector.

Surface layer in CR-39 plastic track detector where the bulk etch rate is enhanced

2003 ◽  
Vol 37 (2) ◽  
pp. 119-125 ◽  
Author(s):  
Tomoya Yamauchi ◽  
A. EL-Rahmany ◽  
Daisuke Mineyama ◽  
Hirotake Nakai ◽  
Keiji Oda
Keyword(s):  
Surface Layer ◽  
Etch Rate ◽  
Track Detector ◽  
Bulk Etch Rate

Dose-rate effects on the bulk etch-rate of CR-39 track detector exposed to low-let radiations

1999 ◽  
Vol 31 (1-6) ◽  
pp. 121-126 ◽  
Author(s):  
T. Yamauchi ◽  
T. Taniguchi ◽  
K. Oda ◽  
T. Ikeda ◽  
Y. Honda ◽  
...  
Keyword(s):  
Dose Rate ◽  
Etch Rate ◽  
Track Detector ◽  
Bulk Etch Rate ◽  
Dose Rate Effects ◽  
Rate Effects

Effects of UV irradiation on Fission-fragment track parameters in Makrofol-E detector

2019 ◽  
Vol 28 (12) ◽  
pp. 1950110 ◽  
Author(s):  
R. K. Jain ◽  
S. Kumar ◽  
A. Kumar ◽  
Aniket Kumar ◽  
M. K. Singh ◽  
...  
Keyword(s):  
Activation Energy ◽  
Solid State ◽  
Fission Fragment ◽  
Etch Rate ◽  
Activation Energies ◽  
Track Detector ◽  
Nuclear Track Detector ◽  
Bulk Etch Rate ◽  
Track Etch Rate ◽  
Track Etch

This study gives information about the effects of UV (here, the wavelength is 160 nm) exposure on the bulk etch rate ([Formula: see text], track etch rate ([Formula: see text], the detector sensitivity ([Formula: see text], critical angle ([Formula: see text] and etching efficiency ([Formula: see text] of Makrofol-E Solid State Nuclear Track Detector. The effect of UV on the activation energy of Makrofol-E was also studied. Nine pieces of Makrofol-E Solid State Nuclear Track Detector were separated into three equal sets as set A, set B and set C. Set A, named as reference set (Fission fragment FF), was irradiated to [Formula: see text]Cf source. Set B, called as post-exposed ([Formula: see text]), was first irradiated to [Formula: see text]Cf and then exposed to UV. The process was reversed for set C named as pre-exposed ([Formula: see text]) at the same conditions. From the results, it is concluded that radiation produces small but significant effect on activation energy [Formula: see text] of bulk etch rate for pre-exposed and post-exposed samples. Also, the activation energies [Formula: see text] of track etch rate for post-exposed and Fission fragment samples are within experimental uncertainty. The energy carried by UV radiation may be responsible for cross networking processes occurring during the exposure which results small change in activation energies for both [Formula: see text] and [Formula: see text]. The [Formula: see text] can be increased by hardening detector material of the pre-exposed detector.

The Measurements of Natural Radioactivity, (Radon and Gamma concentrations), around the old fertilizer factory in Basrah/Iraq

2015 ◽  
Vol 7 (1) ◽  
pp. 1324-1335
Author(s):  
Jabbar H. Jebur
Keyword(s):  
Effective Dose ◽  
Radon Concentration ◽  
Gamma Ray ◽  
Annual Effective Dose ◽  
Track Detector ◽  
Exhalation Rate ◽  
Hazard Indices ◽  
Radium Equivalent ◽  
Passive Technique ◽  
Radium Activity

Radon concentration, exhalation rate, annual effective dose, radium activity, thorium, uranium potassium and radium equivalent have been measured in the present investigation for soil in the area around the old fertilizer factory in southern of Basrah Governorate. The measurements based on CR39 track detector for passive method, RAD7 for active method and NaI(Tl) for gamma concentration measurements. Average values for radon concentration in soil were 112.04±10.76 Bq/m3 using passive technique and 104.56±6.05 Bq/m3 using RAD7. From the result of the passive technique, area and mass exhalation rates and the annual effective dose were calculated. Gamma ray spectroscopy for the soil samples were performed and found that the average concentrations of 226Ra, 232Th and 40K were 50.89 Bq/kg, 21.74 Bq/kg and 640.4 Bq/kg respectively. Gamma ray hazard indices were calculated and found they are within the world average.

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