dosimeter Articles

  • Calibration and characterisation of extremity dosimeters

    The increasing use of radiation in the medical field is providing great advances in health improvement. However, these techniques can generate an increase in the number of professionals exposed to radiation. The Brazilian authorities (Brazilian Nuclear Energy Commission ? CNEN) have imposed the monitoring of specific body parts of professionals. One of these obligations is the monitoring of the ...


    By Inderscience Publishers

  • Controlling Exposure to Noise at Work with Personal Noise Dosimeters

    Which method is best to monitor noise: sound level meter or noise dosimeter? Controlling exposure to noise at work with noise dosimeters Our work environment has been transformed since the 1970’s with the introduction of new machinery and technical equipment designed to improve and increase general productivity. This has revolutionalised the way we operate ...


    By Pulsar Instruments plc

  • Canarina CUSTIC software · noise dosimeters and modeling · introduction 5

    Noises are irregular and disordered vibrations including all possible frequencies. The intensity of a sound I can be expressed in decibels with the standard equation: L=10 log(I/I0) where I0 is the quietest sound most people can hear, the threshold of hearing 10-12Wm-2.  When the ratio is between ...

  • Performance of some handheld dosimeters used for gamma–ray ambient dose rate measurements

    A study was carried out on the performance of some handheld dosimeters that are used for measuring ambient gamma dose rates. A CsI scintillation–based and two GM–based dosimeters were used to measure the absorbed dose rates in an indoor environment, inside a lead shield, on different floors of a building, in a desert environment and in a boat on the Arabian Gulf. The study showed that while some ...


    By Inderscience Publishers

  • Inno-badge – an electronic dosimeter badge for continuous recording of a worker`s exposure to Phosgene gas

    Untitled Document Phosgene, also known as Carbonyl Chloride, is a widely used but highly toxic substance. At room temperature Phosgene gas is nearly colourless, and at low concentrations ...


    By Baum Publications Ltd.

  • Development of sintered composites of CaSO4 doped with Dy and Nd

    The main purpose of this work is the development of sintered composites in order to allow their use as thermoluminescence (TL) dosimeters using a simple route to preparation and employing high temperature. The composites were prepared with CaSO4.2H2O doped with Dy2O3 and NdO3. Initially, CaSO4.2H2O was dehydrated in an oven at 100°C for 1 h. After addition of dopants and homogenisation, Polyvinyl ...


    By Inderscience Publishers

  • Experimental determination of dose uniformity in the CDTN gamma irradiator

    This paper describes an experimental study of dose uniformity within a container used for products irradiation, in the gamma irradiation facility at Nuclear Technology Development Center (CDTN). The CDTN is a research institute of the National Nuclear Energy Commission (CNEN), Brazil. Polymethylmethacrylate (PMMA) dosimeters were used in order to determine the Dose Uniformity Ratio (DUR) inside ...


    By Inderscience Publishers

  • A report of staff overdose during fluoroscopic procedures

    The aim of this study was to determine mean absorbed doses to the stuff working in operation room after renovation and establishing a new X-ray equipment and to find an approach to reduce the absorbed dose to the doctors and nurses in operation room. The source of over exposure was a combination of new equipment and lack of awareness of staff engrossed in their duties.Keywords: staff overdose, ...


    By Inderscience Publishers

  • An Industrial Noise Map is Basic to Hearing Conservation

    An Industrial Noise Map Is Basic to Hearing Conservation In the U.S., OSHA has set regulations on worker noise exposure. The usual measurement method is to use a portable noise dosimeter attached to a worker that measures noise exposure as the person moves about the work area. However, this does nothing to identify the source and location of the noise. When conducing a noise survey, a noise ...

  • Noise Monitors and Meters

    Sound level meters Description and ApplicationsThe sound level meter is a lightweight instrument for the measurement of sound pressure level (SPL) in decibels. All ANSI-approved meters meet minimum requirements that include an A-weighted network, a slow-response meter characteristic, and a fully graduated scale with measurements ranging from 80 to 130 dBA. The Type II meter is most frequently ...

  • Noise Measurement

    Definitions Threshold and criterion levels The threshold level is the A-weighted sound level at which a personal noise dosimeter begins to integrate noise into a measured exposure. For example, if the threshold level on a sound level meter is set at 80 decibels (dB), it will capture and integrate into the computation of dose all noise in the employee's hearing zone that equals or exceeds 80 dB. ...


  • Development and production of holders for extremity detectors

    The objective of this paper was to develop and produce holders for thermoluminescent detectors for use in interventionist radiology and nuclear medicine. To obtain the value of Dose Equivalent for Extremities, a dosimetry of extremities was done. The holders must have characteristics which are adequate for their intended use. The detector element used in the holders was the LiF:Mg,Ti (TLD-100) ...


    By Inderscience Publishers

  • The Monte Carlo simulation of the TLD response function: scattered radiation field application

    Thermoluminescent Dosimeters (TLDs) have various applications in nonprimary beam dosimetry. The Monte Carlo simulation of the TLD response was done in low energy beams to improve its clinical use in scattered beam dosimetry. The normalised values of the measured quality dependence factors for different X-ray beams were found to be 1.28, 1.24, 1.16, 1.07 and 1.03 for different beam qualities, ...


    By Inderscience Publishers

  • Improvement of epidemiological data analysis by unbiased estimates of log-normal dose distribution

    The effects of radiation on population and risk assessment are studied through epidemiological studies that are heavily dependent on dose distribution. Radiation doses to individual workers follow a log-normal distribution. Computation of the collective dose with the minimum detectable values (Detection Limit or DL) as zero is biased. Hence the expectation value of the 'missed' doses is computed ...


    By Inderscience Publishers

  • Thermoluminescence studies of nanoparticle and bulk NaMgF
    3
    :Mn

    Thermoluminescence and photoluminescence are observed in nanoparticle and bulk NaMgF3:Mn2+ samples. The activation energies for the two main peaks in the TL data are similar for nanoparticle and bulk samples and they are nearly independent of Mn2+ concentration. The similar trap depths suggest that ...


    By Inderscience Publishers

  • Cirrus Research – Noise Measurement Pioneers for Over 45 Years [Video]

    Since 1970, Cirrus’ mission has been to make monitoring noise simple. More than 45 years later, we thought it was time to look back at our story so far and see what we have achieved. Join us by watching our video, which explores our history and what makes us the noise measurement pioneers that we are today. Cirrus Research ...


    By Cirrus Research plc

  • Noise in the Animal Shelter Environment: Building Design and the Effects of Daily Noise Exposure

    Sound levels in animal shelters regularly exceed 100 dB. Noise is a physical stressor on animals that can lead to behavioral, physiological and anatomical responses. There are currently no policies regulating noise levels in dog kennels. The objective of this study was to evaluate the noise levels dogs are exposed to in an animal shelter on a continuous basis and to determine the need, if any. ...


    By Troy Acoustics Corporation

  • Physical dosimetry system in radiation accidents

    We experience various types of radiation accidents. When a radiation accident happens, one of the important aspects that we have to consider is the radiation dose to the victims of the accident. To judge the health effects due to radiation exposure, it is necessary to make a dose assessment. There is a variety of dose assessment methods, of two types: biological dosimetry and physical dosimetry. ...


    By Inderscience Publishers

  • Are radiologists and radiological technologists at greater risk of reproductive health problems? Data from seven provinces in Iran

    Many radiation workers believe that occupational exposures have the potential to interfere with their normal reproductive function. In this study, a total of 621 radiation workers (336 females and 285 males) who worked in hospitals/clinics in seven different provinces were randomly selected. All the participants were interviewed and the reports of their previous exposures, as recorded by film ...


    By Inderscience Publishers

  • Measurement, Effect Assessment and Mitigation of Pollutant Impact on Movable Cultural Assets. – Innovative Research for Market Transfer

    The MEMORI project (Grant agreement 265132) was performed in the period 2010-2013. The project was coordinated by NILU-Norwegian Institute for Air Research and included 14 partners, four subcontractors and an advisory end-user group with 8 members. MEMORI aimed at providing the conservation market with innovative, non-destructive, and early warning technology for easy assessment of environmental ...

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