dosimeter Articles
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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 ...
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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 ...
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Safe-Series multi instrument training
The STS Safe-Series for the first time allows users to create diverse training environments where survey meters and dosimeters can be integrated into the same scenario and respond to the same simulated source. Due to the realistic field pattern and attenuation and shielding characteristics of the simulated radiation field trainees can quickly learn the principles of radiation safety and see real ...
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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 ...
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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 ...
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doseBadge – 20 Years of Evolutionary Success
In 1996 Cirrus pioneered the first doseBadge Noise Dosimeter. 20 years later and we are preparing to launch the fifth generation. The philosophy of the doseBadge is to eliminate cables, controls and buttons. This reduces the risk of damage, tampering, weight and service costs for the user. This philosophy will never change. Today, Cirrus has sold more than 20,000 doseBadges to help companies ...
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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, ...
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A Dosimeter for the Future: a History of the doseBadge - Case study
In 1995, a team of young engineers at Cirrus Research set to work on revolutionising the design and functionality of noise dosimeters. Their hard work and tireless dedication to the protection of people’s hearing led them to design the doseBadge, which has now become synonymous with personal noise exposure measurement. The process of designing the doseBadge wasn’t easy or without ...
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The Measure Issue 10 Autumn 2016 – The Cirrus Research Newsletter
The latest issue of The Measure, the Cirrus Research newsletter is now available for download. In this issue we’ve covered: The new doseBadge5 Noise Dosimeter with a history and timeline of the doseBadge family A case study for the Optimus Green Sound Level Meter and the Invictus Environmental Noise Monitor at the Classical Haçienda Concert Our Dragon Boat Race Team Dates for ...
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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 ...
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Grab £1000 of free benefits with the dBAdvantage Card from Cirrus Research
The dBAdvantage Card from Cirrus is the quick and easy way to grab £1000 of FREE benefits when you buy a Cirrus sound level meter or doseBadge noise dosimeter kit. As a dBAdvantage Card member you’ll automatically get access to the following benefits: 1. A FREE place, each year for 3 years, on a Cirrus Product Training Course worth £750 2. A 10% discount on the costs of ...
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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, ...
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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) ...
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New STS 6150AD Simulator now available
Safe-Series – 6150AD Radiation Field Simulation The new STS Safe-Series range brings new technology into handheld simulation to provide the most realistic simulators available today. A unique radio system produces both a near isotropic field pattern from the source and from the detector. A good representation of the inverse square law and attenuation of different materials adds to the ...
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Simulators supplied to NARU
STS have supplied the NARU -HART Ambulance service training centre at Winterbourne Gunner with a set of Safe-Series simulators for training the HART teams in response to potential incidents involving radiation. The training devices are based around the Thermo EPD style Electronic Personal Dosimeter and offer crews the opportunity to train in a simulated radiation field without any risk. The ...
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Noise dosimeter - Portable noise measurement technology
Capturing employees’ exposure to noise with portable technology Whether we like it or not, Health and safety is an integral part of any business today. Firstly, it exists to protect the well being of employees, customers and visitors. Secondly, complying with health and safety regulations makes good business sense too. It is vital to ensure that your company is complying with the noise ...
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Introducing Octave Band Filters for the doseBadge5 Noise Dosimeter
We’re pleased to announce that the Cirrus doseBadge5 Noise Dosimeter now includes 1:1 Octave Band Filters as standard*, adding to the already comprehensive set of measurement data that the unique doseBadge5 can provide. The doseBadge5 is already the best specified dosimeter available with multiple measurement channels, comprehensive data logging, Bluetooth® wireless communications and ...
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Noise Testing and Noise Dosimetry for Industrial Facilities
Hearing Conservation Program Whether they are subjected to constant din or sporadic bursts of loud sounds throughout the day, employees in noisy workplaces are at risk of permanent damage to their hearing and employers face possible OSHA citations. For a noisy workplace, establishing a Hearing Conservation Program is imperative to protecting both employee health and employer liability. This ...
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I Need A Noise Dosimetry Survey for OSHA Compliance
OSHA requires a noise dosimetry survey to determine if workers are exposed to noise that could damage their hearing. This is more than just using a sound level meter to take some noise readings. A noise dosimeter is actually worn by the worker for a shift. This enables a true evaluation of a worker’s noise exposure as he/she moves about the workplace. The noise dosimeter is worn for a full ...
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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 map ...
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