Determination of CR-39 detection efficiency for fast neutron registration and the absolute neutron dosimetry

El-Sersy, A.R.; Khaled, N. E.; Eman, S.A.

doi:10.1016/j.nimb.2003.08.035

Cited by 16 publications

(5 citation statements)

References 8 publications

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“…ionization chamber, and the agreement between them is shown in Figure 2 (11)(12)(13). Figure 3(a) shows the good agreement between the monitor reading and TLD badge or card measurements in the presence of the slab phantom.…”

Section: Monitor (µSv/h) Chamber (µSv/h) Theoretical (µSv/h)mentioning

confidence: 71%

Study of the improvement of TLD cards for personal neutron dosimetry

Rabie

Hassan

El-Sersy

et al. 2010

Radiation Effects and Defects in Solids

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In this work, personal thermoluminescence dosimeter (TLD) cards type of GN-6770 (holder type 8806) from Harshaw were used for personal neutron dosimetry. The response of the dosimeters has been determined in terms of the personal absorbed dose and personal dose equivalent for different neutron energy components, based on the recommendations of ICRP-60 and ICRU-49. Neutron irradiation was performed using a 5 mCi Am-Be neutron source. The TLD reader, type Harshaw 6600, was installed and calibrated for accurate neutron doses equivalent to gamma-ray doses. It was found that fast neutron doses measured by TLD (badges or cards) are in agreement with those measured by neutron TE (tissue equivalent gas) ionization chambers and neutron monitors. Thermal neutron doses measured by TLD cards were overestimated when compared with those measured by neutron monitors. Additional Cd was used to reduce thermal neutron doses to be in agreement with actual thermal doses. Other configurations for TLD crystals are also suggested for accurate thermal neutron dose measurements.

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Section: Monitor (µSv/h) Chamber (µSv/h) Theoretical (µSv/h)mentioning

confidence: 71%

Study of the improvement of TLD cards for personal neutron dosimetry

Rabie

Hassan

El-Sersy

et al. 2010

Radiation Effects and Defects in Solids

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“…With the information provided by the neutron spectra, the converter material could be selected looking for materials with high σ(n,x) charged particle. Several materials are employed as photoneutron converters depending upon the situation, whether the detector is used for dosimetry, spectrometry, or to measure the uranium concentration in tissues [62][63][64][65][66][67]. In table 7, we report some of them with relevant information.…”

Section: A Resume Of Photo-neutron Convertersmentioning

confidence: 99%

“…For the fast component of the neutron spectrum, El-Sersy et al [66] obtained an efficiency value of ε = 3.1 x 10 -5 tracks/neutron, probably employing cadmium filter as a cut-off for thermal neutrons.…”

Section: Determination Of Photo-neutron Fluence Ratementioning

confidence: 99%

SSNTD Technique in Photo-Neutron Applications

Sajó-Bohus

Vega-Carrillo²,

Virk

2015

SSP

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Passive Solid State Nuclear Track Detectors (SSNTDs) are a versatile tool for neutron studies as has been shown long ago and several good quality materials are commercially available. They are useful for charged particle detection in the linear energy transfer (LET) range above the threshold value of ~10 keV μm-1. Linacs, operating above 6 MeV up to the energy region where radiotherapy is applied usually up to ~25MeV, induce unwanted photo-neutron field; their spectra shows two components due to reaction dynamics based on evaporation and knock-on mechanisms. Neutrons produced by Linacs are often neglected in health application; however, today it has become necessary to assess the effect on patient, staff and radiation workers. Radiation studies using SSNTDs play a major role in this case. Other fields also take advantage of the passive detectors properties; in fact they are employed with success to measure neutron signals relevant for plasma diagnostics as it was demonstrated at the RFX facility as part of the ITER project. The PADC-NTD techniques provide information on external neutron field values around the RFX-installation during pulsed operation. In any case, converter materials, as charged particles from (n, p) and (n, α) reactions, are required to produce neutron fingerprints through latent tracks. These once etched provide information on neutron fluence spatial values. Track histograms are then employed to determine photo-neutron induced damage in materials as well as radiation dose to both patient and professionally exposed workers. The estimated neutron fluence that can be determined by NTM covers a large range of values, the largest being above 1010(± 12%) neutrons/cm2.

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“…However the cross-section, which is the geometric cross-section, for this collision is very low (1 barn) and only the proton recoil tracks close to the surface will be etched; those deeper in the bulk of CR-39 are not exposed to the etchant, and remain unobservable. So overall the sensitivity of CR-39 to neutrons is of the order of 10 −4 [11]. For the NX2 PF at optimum pressure and voltage, the neutron yield is of the order of 10 8 per shot.…”

Section: Charged Particles Recognitionmentioning

confidence: 99%

Magnetic spectrometry of high energy deuteron beams from pulsed plasma system

Roshan¹,

Springham²,

Talebitaher³

et al. 2010

Plasma Phys. Control. Fusion

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A detailed and precise study of high energy deuteron beams from a plasma focus device shows that they follow a non-power law distribution, unlike most of the other works. This is in agreement with our previous studies using a direct and unambiguous diagnostic of the activation yield-ratio technique. It is possible that the E −n dependence effectively terminates at some maximum deuteron energy. The experimental results show that the spectrum increases to very high energies whereas the power law fit fails. A unique feature of the magnetic spectrometry experimental arrangement, in this work, is that the pinhole holder also functions as a Faraday cup for time-resolved measurements of the deuteron beam.

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Determination of CR-39 detection efficiency for fast neutron registration and the absolute neutron dosimetry

Cited by 16 publications

References 8 publications

Study of the improvement of TLD cards for personal neutron dosimetry

Study of the improvement of TLD cards for personal neutron dosimetry

SSNTD Technique in Photo-Neutron Applications

Magnetic spectrometry of high energy deuteron beams from pulsed plasma system

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