The dosimetric use of beryllium oxide as a thermoluminescent material: A preliminary study

Scarpa, G.

doi:10.1088/0031-9155/15/4/006

Cited by 62 publications

(15 citation statements)

References 7 publications

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“…BeO was considered as an alternative thermoluminescence (TL) dosimeter material in competition with LiF (TLD 100) due to its near tissue equivalence (Z eff ¼ 7.1) (Scarpa, 1970;Scarpa et al, 1971) and high sensitivity to radiation dose. In addition, the availability in robust and easily handled ceramic disc form, high thermal conductivity, and low-cost made it very attractive to many research groups.…”

Section: Introductionmentioning

confidence: 99%

Optically stimulated luminescence from BeO ceramics: An LM-OSL study

Bulur

Yeltik

2010

Radiation Measurements

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Section: Introductionmentioning

confidence: 99%

Optically stimulated luminescence from BeO ceramics: An LM-OSL study

Bulur

Yeltik

2010

Radiation Measurements

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“…The glow curves from the normal, slip-caste and nuclear grades of Consolidated Beryllium Co. B e 0 have appeared before (SCARPA, 1970;GAMMAGE and GARRISON, 1974). These latter TLD materials suffer from widely varying intragroup sensitivities, and extremely intense, latent spurious light emissions which develop not only while exposure to fluorescent lighting is taking place, but even during storage in the dark.…”

Section: (B) Glow Curvesmentioning

confidence: 97%

“…The only reported thermal fading data for powders and ceramics are for the condition of storage in the dark in a laboratory atmosphere (TOCHILIN et al, 1969;SCARPA, 1970;SCARPA, et al, 1971;YASUNO and YAMASHITA, 1971). Field conditions, however, can produce extremes of temperature and humidity.…”

Section: ( E ) Thermal Fadingmentioning

confidence: 99%

“…Coupled with it being commercially available as small disks, cheap, mechanically rugged, with a low chemical reactivity and high melting point (2500°C) it is equal or superior to LiF TLD in each of these respects. Several types of ceramic and B e 0 powders with different impurity contents have been the subject of TLD investigations made principally by TOCHILIN et al (1969( ), BECKER et al (1970, SCARPA (1970), SCARPA et al (1971), YASUNO andYAMASHITA (1971), YAMASHITA et al (1974) and HOBZOVA (1974) and intercomparison tests using mailed LiF and B e 0 dosimeters have lately been undertaken successfully (PUITE et al, 1974). There are, however, some uncertainties, inconsistencies and confusion in the previously published studies relating to the temperature and relative heights of T L peaks, lower detectable dose levels, onset of supralinearity, energy dependence of the response, thermal fading and response to light.…”

Section: Introductionmentioning

confidence: 99%

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Improvements in the Use of Ceramic BeO for TLD

Crase¹,

Gammage²

1975

Health Physics

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Several types of commercially available ceramic Be0 are evaluated for thermoluminescence and combined thermolurninescence-exoelectron dosimetry (TLD-TSEE) . The ceramic Thermalox 995 is superior in nearly all respects. Physical and chemical treatments which enhance or reduce sensitivity and stability of TSEE exert often similar influences on the TL. A thin surface region, which is rich in impurities, suppresses spurious emissions of both light and electrons and allows combined TL and TSEE measurements to be made on the same B e 0 disk. The luminescence is a maximum at 260 nm requiring a reader with a u.v.-sensitive photomultiplier tube. The characteristics important for TLD are as follows: a lower exposure limit of 1 mR with supralinearity starting at 10 R; only 10 % fading after 3 months at 3OoC and 90 % relative humidity, but rapid bleaching in laboratory fluorescent lighting of 50 % in 30 min; and an energy dependence of response similar to that of LiF TLD.

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“…[35] More recently, by improvements in the measurement technique by reducing the distance between the detector (PM tube) and the sample (stimulating from one side and detecting the emitted signal from the opposite side of the disk), doses as low as a few μGy could be measured by Sommer. [36] BeO obtained from different sources is known to exhibit variation in its sensitivity by about a factor of 3,[37] and also impure samples are found to exhibit a much higher sensitivity than do pure samples. [7] The OSL properties of BeO clearly emphasize a strong need for preparing BeO doped with appropriate activators.…”

Section: Characteristics Of Osl Materials For Radiation Dosimetrymentioning

confidence: 99%

Recent developments of optically stimulated luminescence materials and techniques for radiation dosimetry and clinical applications

2008

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During the last 10 years, optically stimulated luminescence (OSL) has emerged as a formidable competitor not only to thermoluminescence dosimetry (TLD) but also to several other dosimetry systems. Though a large number of materials have been synthesized and studied for OSL, Al2O3:C continues to dominate the dosimetric applications. Re-investigations of OSL in BeOindicate that this material might provide an alternative to Al2O3:C. Study of OSL of electronic components of mobile phones and ID cards appears to have opened up a feasibility of dosimetry and dose reconstruction using the electronic components of gadgets of everyday use in the events of unforeseen situations of radiological accidents, including the event of a dirty bomb by terrorist groups. Among the newly reported materials, a very recent development of NaMgF3:Eu2+ appears fascinating because of its high OSL sensitivity and tolerable tissue equivalence. In clinical dosimetry, an OSL as a passive dosimeter could do all that TLD can do, much faster with a better or at least the same efficiency; and in addition, it provides a possibility of repeated readout unlike TLD, in which all the dose information is lost in a single readout. Of late, OSL has also emerged as a practical real-time dosimeter for in vivo measurements in radiation therapy (for both external beams and brachytherapy) and in various diagnostic radiological examinations including mammography and CT dosimetry. For in vivo measurements, a probe of Al2O3:C of size of a fraction of a millimeter provides the information on both the dose rate and the total dose from the readout of radioluminescence and OSL signals respectively, from the same probe. The availability of OSL dosimeters in various sizes and shapes and their performance characteristics as compared to established dosimeters such as plastic scintillation dosimeters, diode detectors, MOSFET detectors, radiochromic films, etc., shows that OSL may soon become the first choice for point dose measurements in clinical applications. A brief review of the recent developments is presented.

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The dosimetric use of beryllium oxide as a thermoluminescent material: A preliminary study

Cited by 62 publications

References 7 publications

Optically stimulated luminescence from BeO ceramics: An LM-OSL study

Optically stimulated luminescence from BeO ceramics: An LM-OSL study

Improvements in the Use of Ceramic BeO for TLD

Recent developments of optically stimulated luminescence materials and techniques for radiation dosimetry and clinical applications

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