The development, characterization, and performance evaluation of a new combination type personnel neutron dosimeter

Liu, J.C.; Sims, Christopher E.; Poston, J.W.; Texas, A

doi:10.2172/5364283

Cited by 4 publications

(2 citation statements)

References 54 publications

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“…In the dosemeter design, the thickness of the cadmium filtration for element 1 is 500 mg cme2, which can absorb 99.9% of the incident thermal neutrons. Remember that for a TLD-600 chip, the thermal neutron sensitivity is about one hundred times higher than the fast neutron (1 MeV) sensitivity on a mGy* per mSv basis, and the fast neutron sensitivity is about the same as the photon sensitivity (Liu et al 1989). This high attenuation factor (l-99.9% = 10m3) f d o ca mium is more tha.n enough to eliminate the cadmium-covered TLD-600 response to the incident thermal neutrons in almost all field situations.…”

Section: Discussionmentioning

confidence: 99%

“…This high attenuation factor (l-99.9% = 10m3) f d o ca mium is more tha.n enough to eliminate the cadmium-covered TLD-600 response to the incident thermal neutrons in almost all field situations. For example, for all spectra at the ORNL fields, thermal neutrons contribute no greater than 10% of the total neutron dose equivalent (Liu et al 1989).…”

Section: Discussionmentioning

confidence: 99%

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A Proposed Four-element Neutron-photon-beta Thermoluminescence Dosimeter

Liu

Sims²,

Ahmed³

1992

Health Physics

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It is common practice for a worker exposed to a mixed field with neutrons to wear both a photon-beta dosimeter and a neutron dosimeter. In this study, a thermoluminescence dosimeter has been designed and is proposed for use in mixed fields. The maximum applicable ranges of the mixed field can have photons with unknown energy from 20 keV to 2 MeV, betas with unknown energy from 147Pm to 90Sr-Y, and neutrons of known energy from thermal to 15 MeV. This proposed dosimeter (a combination of Harshaw beta-gamma thermoluminescence dosimeter and albedo neutron thermoluminescence dosimeter) has an advantage of using a minimum number of thermoluminescence dosimeter elements (therefore, making it less costly) to measure the dose equivalents in a mixed field of neutron, photon, and beta radiation. The basic dosimeter design consists of four thermoluminescence elements of TLD-600 and TLD-700 with different filtrations. Using the high-temperature peak methodology for TLD-600 and a filtration algorithm, the neutron, photon, and beta dose equivalents in a mixed field can be determined. The design, detection principle, and three dosimetric algorithms for three versions of the basic design of the four-element dosimeter are presented and discussed. The work that is required for the proposed dosimeter to be usable when it is made is also presented.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A Proposed Four-element Neutron-photon-beta Thermoluminescence Dosimeter

Liu

Sims²,

Ahmed³

1992

Health Physics

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Superheaded drop bubble neutron dosimeter performance in a work environment

Riel¹,

Kerschner²,

Nelson

et al. 1991

IEEE Trans. Nucl. Sci.

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Bubble dosimeters offer a unique combination of sensitivity, immediate results, and dose equivalent response, but their use Pen Type; The drops and matrix are in a small syringe, and the dose is read from the displacement. This prototype device, produced for NAVSWC, led to a displacement device using the standard APFELm cartridge. has been limited by temperature and vibration. To determine their practicality, we simulated a large operation in an air conditioned radiation work environment. We tested 120 devices of three types. The batch homogeneity and reproducibility were about 20%, and the lower limit of detection was about 10 pSv(1 mrem). The dose equivalent indicated by bubble dosimeters agreed with remmeters and spectrometers more closely than did the dose indicated by conventional dosimeters.

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Radiation Detectors for Individual Monitoring

Rajan¹

2017

Radiation Safety in Radiation Oncology

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The development, characterization, and performance evaluation of a new combination type personnel neutron dosimeter

Cited by 4 publications

References 54 publications

A Proposed Four-element Neutron-photon-beta Thermoluminescence Dosimeter

A Proposed Four-element Neutron-photon-beta Thermoluminescence Dosimeter

Superheaded drop bubble neutron dosimeter performance in a work environment

Radiation Detectors for Individual Monitoring

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