Characteristic studies for fast detection of a wide energy range of alpha particles in polycarbonate detectors

Taheri, M.; Toudeshki, S. Hosseini

doi:10.1016/j.radmeas.2005.06.019

Cited by 14 publications

(10 citation statements)

References 9 publications

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“…The setup simulated here is adapted with the measurements carried out by Taheri and Toudeshki [8] and Hosseini Pooya et al [3] which is still being utilized in National Radiation Protection Department (NRPD) in AEOI, Tehran, Iran. As schematically shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…The mean energy of these particles can be derived from the National Institute of Standard and Technology (NIST) data library [9]. In practice, the fluence and energy of alpha particles have been controlled by a surface barrier detector connected to a proper electronic setup [8]. Also, irradiation time is set such that about 4000 alpha particle per cm 2 reach the detector surface.…”

Section: Methodsmentioning

confidence: 99%

“…Also, irradiation time is set such that about 4000 alpha particle per cm 2 reach the detector surface. Further, the etching process, including the PEW etchant with normal ECE conditions (3 kV cm -1 , 3 h, 25 o C, 2 kHz and 1.7 mA), has been used [8] for which an etching rate of 2 µm h -1 leads to removing a thickness of tetch ≈ 6 µm (etching layer). It is found that the threshold LET for producing the tracks in the PC is Lth ≈ 240 keV µm -1 [8].…”

Section: Methodsmentioning

confidence: 99%

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Calculation of alpha particles detection efficiency for polycarbonate detector using Geant4 toolkit

Moslehi

Baradaran

Taheri³

2022

Jonra

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In the present work, alpha particles detection efficiency of polycarbonate detector (PC) is calculated using Geant4 simulation toolkit. A PC detector with 250 µm thickness and dimension of 2.5 × 2.5 cm 2 is considered. Assuming the passage of alpha particles of an 241 Am source through brass collimators with different lengths, various alpha energies ranging from 0.2 to 2.5 MeV are modeled. Also, an etching layer of 6 µm related to a given electrochemical etching process as well as a threshold stopping power of 240 keV µm -1 required for forming the tracks are used as the input data. The detection efficiency is determined as the ratio of registered tracks per unit area to the number of alpha particles reaching the PC detector surface. To validate the simulation, the results are compared with the experimental data reported in the literature. It is found that the both results agree well within a maximum variation of 10%.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Calculation of alpha particles detection efficiency for polycarbonate detector using Geant4 toolkit

Moslehi

Baradaran

Taheri³

2022

Jonra

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“…The polycarbonate de tec tor was placed on the glass sur face to re cord the al pha par ti cles emit ted from the 210 Po. The 210 Po has an al pha en ergy of 5.3 MeV, while the ef fi cient reg is tra tion of alphas in PC are in a range about 0.5 to 2 MeV us ing the elec tro chem i cal etch ing (ECE) for PEW etchants [23,24]. The PEW so lu tion in clud ing the KOH (15 %), C 2 H 5 OH (40 %) and H 2 O (45 %) and the ECE pro cess of 32 kVcm -1 , 2 kHz and 3 h was ap plied as an ef fec tive method of alpha par ti cles de tec tion in PC [25].…”

Section: Methodsmentioning

confidence: 99%

Retrospective radon measurements based on implanted 210Po in glass objects using polycarbonate detectors

et al. 2018

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1 De part ment of Med i cal Ra di a tion En gi neer ing, Sci ence and Re search Branch, Is lamic Azad Uni ver sity, Teh ran, Iran 2 Nu clear Sci ence and Tech nol ogy Re search In sti tute, Teh ran, Iran Sci en tific pa per http://doi.org/10.2298/NTRP1802167AIn the pres ent in ves ti ga tion, a sur face-de pos ited po lo nium was mea sured in 37 houses in Rasht and Ramsar cit ies of Iran with the aim of eval u at ing the ret ro spec tive ra don con cen tration. The CR-LR tech nique is widely used in this re gard, but for the first time, Lexan polycarbonate de tec tors were used to mea sure the ac tiv ity of 210 Po planted in glassy ob jects. These de tec tors were placed on glassy sur faces for 153 to 365 days. A pas sive cy lin dri cal dif fusion cham ber was used for the con tem po rary ra don con cen tra tion mea sure ments. The dif fusion cham ber con sists of the Lexan polycarbonate films as a solid state nu clear track de tec tors and fil ter. The sur face-de pos ited 210 Po ac tiv ity con cen tra tion was found to vary from 0.26 to 11.96 mBqcm -2 with av er age of 2.62 mBqcm -2 . The sen si tiv ity of 210 Po to polycarbonate was de ter mined to be 0.06456 track per cm 2 per mBqhcm -2 . Thus, the ra don con cen tra tion was found to vary from 122 to 4840 Bqm -3 with an av er age value 1243 Bqm -3 and the con tempo rary ra don con cen tra tion in the area was found to vary from 15 to 2420 Bqm -3 with an aver age 513 Bqm -3 . The re sults in di cate that there is a sig nif i cant cor re la tion be tween the concen tra tion of the ret ro spec tive ra don and the con cen tra tion of the con tem po rary ra don gas in the in di cated ar eas with a co ef fi cient of 0.80672.Key words: glassy ob ject, ret ro spec tive mea sure ment, po lo nium 210, polycarbonate de tec tor, ra don A. Azadbar, et al.: Ret ro spec tive Ra don Mea sure ments Based on Im planted 210 Po .

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“…The etchant components, PEW, is inclusive of; 15% KOH, 40% C 2 H 5 OH and 45% H 2 O. The energy detection range of alpha particles by the method is 0.3-2 MeV [12].…”

Section: Type Of Detectormentioning

confidence: 99%

A diffusion chamber for passive separated measurements of radon/thoron concentration in dwellings

Nabil

Pooya

Zafarghandi

et al. 2012

Nuclear Instruments and Methods in Physics Research Section A:

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Characteristic studies for fast detection of a wide energy range of alpha particles in polycarbonate detectors

Cited by 14 publications

References 9 publications

Calculation of alpha particles detection efficiency for polycarbonate detector using Geant4 toolkit

Calculation of alpha particles detection efficiency for polycarbonate detector using Geant4 toolkit

Retrospective radon measurements based on implanted 210Po in glass objects using polycarbonate detectors

A diffusion chamber for passive separated measurements of radon/thoron concentration in dwellings

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