WHAT TYPE OF DOSIMETERS DO YOU PROVIDE TO MONITOR PHOTONS AND BETA PARTICLES?
For monitoring photons (X or gamma ray) and beta particles, LANDAUER offers a full range of dosimetry services for both routine and special monitoring applications. Our OSL (optically stimulated luminescence) dosimeters are Luxel+ and InLight for whole body and area monitoring. In addition, we offer two TLD (thermoluminescent dosimetry) rings dosimeter for extremity monitoring.
LANDAUER is fully accredited by NVLAP for ionizing radiation dosimetry for specific services (NVLAP Lab Code 100518-0) and accredited by other governing bodies throughout the world.
Please view our Dosimeters & Radiation Measurement Services page for specific details about each of our products.
WHAT TYPE OF DOSIMETERS DO YOU PROVIDE TO MONITOR NEUTRONS?
LANDAUER provides neutron monitoring with Neutrak®
In addition, Luxel+ is an integrated, self-contained packet that comes preloaded, incorporating a thin strip of specially formulated aluminum oxide crystalline material sandwiched within a four-element filter pack that is heat sealed within a laminated, light-tight paper wrapper. All of these components are RF (radiofrequency) sealed inside a tamper-proof plastic blister pack to eliminate possible mishandling, light leakage or lost detection elements. An optional CR-39 component for neutron monitoring can also be incorporated within the dosimeter's clear plastic pack.
For further information, click here for the dosimeter specifications.
WHAT IS INSIDE LUXEL+, AND HOW DOES IT WORK?
Inside Luxel+ is an integrated, self-contained packet that comes preloaded, incorporating a thin strip of specially formulated aluminum oxide crystalline material sandwiched within a four-element filter pack that is heat sealed within a laminated, light-tight paper wrapper. All of these components are RF (radiofrequency) sealed inside a tamper-proof plastic blister pack to eliminate possible mishandling, light leakage or lost detection elements. An optional CR-39 component for neutron monitoring can also be incorporated within the dosimeter's clear plastic pack.
The Luxel+ dosimeter measures radiation exposure due to x, gamma and beta radiation with optically stimulated luminescence (OSL) technology. The OSL radiation detector inside the Luxel+ dosimeter is the thin strip of specially formulated aluminum oxide (Al2O3) crystalline material. During analysis in our laboratory, the Al2O3 strip is stimulated with selected frequencies of laser light causing it to luminesce in proportion to the amount of radiation dose and the intensity of stimulation light.
The luminescence measured during analysis is applied to a dose algorithm that relies on the response ratios between different filter positions within the dosimeter to discriminate between beta and photon (x and gamma) radiation fields to determine exposure results. Dose equivalents arising from exposures to photons (x or gamma rays) will have a deep, lens of eye and shallow value reported. Depending on the energy of the x or gamma rays, these values may or may not be equal. Beta exposures are reported only as a shallow dose equivalent.
The detector can be restimulated numerous times to confirm the accuracy of a radiation dose measurement. A full reanalysis is automatically performed for every measurement yielding a dose in excess of 500 mrem (5 mSv).
The imaging area renders unique filter patterns that provide qualitative information about conditions during exposure. Imaging to identify static, dynamic, or contamination conditions is automatically performed for low-energy photon measurements yielding a dose in excess of 500 mrem (5 mSv).
WHAT TYPE OF INFORMATION DOES LUXEL+ IMAGING PROVIDE?
The filter pack imaging area renders unique filter patterns that provide qualitative information about conditions during exposure. Imaging to identify static, dynamic, or contamination conditions is automatically performed for all beta and low-energy photon measurements yielding a dose in excess of 500 mrem (5 mSv).
A static exposure image indicates the dosimeter was still with no movement at the time of exposure. This is verified by the distinct grid patterns in the filter pack imaging area. A static exposure implies that the dosimeter was not worn at the time of exposure, and an accidental exposure may have occurred.
A dynamic exposure image indicates the dosimeter was moving at the time of exposure. This is verified by the blurred grid patterns in the filter pack imaging area. A dynamic exposure implies that the dosimeter was worn at the time of exposure, and the reported dose is valid.
WHAT IS A STATIC OR DYNAMIC EXPOSURE?
Full reanalysis, including imaging to identify static, dynamic, or contamination conditions, is automatically performed for all beta and low-energy photon measurements yielding a dose in excess of 500 mrem (5 mSv). Reanalysis and/or imaging results for an exposure appear in notes at the bottom of the dosimetry report. It is the filter pack imaging area that renders unique filter patterns that provide qualitative information about conditions during exposure.
A static exposure image indicates the dosimeter was still with no movement at the time of exposure. This is verified by the distinct grid patterns in the filter pack imaging area. A static exposure implies that the dosimeter was not worn at the time of exposure, and an accidental exposure may have occurred.
A dynamic exposure image indicates the dosimeter was moving at the time of exposure. This is verified by the blurred grid patterns in the filter pack imaging area. A dynamic exposure implies that the dosimeter was worn at the time of exposure, and the reported dose is valid.
WHAT IS OSL?
OSL is an acronym for optically stimulated luminescence. OSL technology is used in LANDAUER’s Luxel+ and InLight dosimeters
WHAT DOES THE RING USE TO MEASURE RADIATION EXPOSURE?
The LANDAUER Saturn®ring dosimeters rely on thermoluminescent (TLD) technology.
The TLD chip is safely encapsulated inside the identification cover. The cover and TLD are independent of the ring base.
CAN SATURN RINGS BE STERILIZED?
Please view the Saturn Ring Instructions for Use document for cleaning information.
LANDAUER SPECIAL SERVICES
LANDAUER can support special dosimetry studies where conventional personnel dosimetry is inappropriate. Through Special Services, much tighter tolerances, special calibrations and other non-routine functions can be provided. Examples of special services have included patient dose assessment, blood bank irradiation studies, high dose dosimetry, source calibration, and area monitoring.
Please contact the Special Services Department at specialservices@LANDAUER.com for requests of this nature.
WHAT IS NVLAP?
NVLAP, an acronym for the National Voluntary Laboratory Accreditation Program, accredits testing laboratories based upon their ability to meet established standards in specific fields of testing. Testing is achieved by on-site assessments and laboratory participation in proficiency testing, technical evaluation, and administrative review. Accreditation must be renewed each year. The National Institute of Standards and Technology (NIST), an agency of the U.S. Department Commerce's Technology Administration, manages NVLAP. NVLAP's Ionizing Radiation Dosimetry field of testing was established in 1984 to implement the Nuclear Regulatory Commission's (NRC) requirement that all dosimeters (badges) used by licensees to comply with federal law must be processed and evaluated by a NVLAP accredited laboratory. The NRC's requirements can be found in the Standards for Protection Against Radiation, published in the Code of Federal Regulations. LANDAUER's facility is fully accredited by NVLAP (NVLAP Lab Code: 100518-0) for ionizing radiation dosimetry for specific services. A copy of our current certificate and scope of accreditation is available here