Hayriye Yeter Göksu

• PhD
• Retired at Helmholtz Zentrum München Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH)

This article focuses on the study of (90)Sr in the tooth tissues of Techa riverside residents 60 years after intake. The Techa River was contaminated by radioactive wastes in the 1950s. Contamination of the river system, including water, bottom sediment, floodplain soil, and grass, depended on the distance from the source of releases. Therefore, th...

Asi Delta Plain is under the influence of Dead Sea Fault Line which is extended from Red Sea to Antakya and the Eastern Anatolian Fault Line extended from Karlıova to Antakya. The drill samples obtained from Asi Delta Plain on the Samandağ coast (Hatay) were investigated. Of the observed foraminifer species, Siphonaperta aspera, Quinqueloculina sem...

This paper presents the results of an effort to evaluate anthropogenic doses in bricks from old buildings located on the banks of the Techa River. The river area was contaminated in 1949-1956 as a result of radioactive waste releases by the Mayak plutonium facility (Southern Urals, Russia). Absorbed doses were determined by luminescence measurement...

A vaulted basement found at the rabbi's residential house which was oriented according to the requirements of a mikveh has created a controversy in the architectural history of the Ichenhausen Synagogue (Germany). The rabbi's residential house is known to have been built in 1781 during the replacement of the old Synagogue that had existed since 168...

ABSTRACTS The ‘spurious’thermoluminescent glow from ground samples of flint is responsible for dating errors in the region of 10 000 years for grains less than 45 μm diameter or of 4000 years for larger grains. The glow is partly tribothermoluminescence and partly regeneration thermoluminescence and the conditions in which these arise or are accele...

The spatial variation of dose rate from a 90Sr/90Y calibration source mounted on a Risø equipment TL-DA-15 was investigated. Six disks accommodating single grains of α-Al2O3:C were irradiated at the Secondary Standard Dosimetry Laboratory (SSDL) at GSF to a uniform photon radiation field. The corresponding single-grain OSL signals of each grain wer...

The utility of ID card chip modules to function as a radiation dosimeter is investigated. Specifically the thermoluminescence (TL) and optically stimulated luminescence (OSL) of a sampling of chip modules are measured over the range of 0.4–12 Gy. Both infrared (830 nm) from a laser diode and blue light (470 nm) from LEDs were used to perform the OS...

The cumulated absorbed doses in four electric porcelain isolators collected at the site of the "Kraton-3" underground nuclear explosion in the Republic of Sakha (Yakutia), Russia, were evaluated using the thermoluminescence technique. The doses attributable to the accidental radioactive release from the explosion ranged from 1.2 to 10 Gy; the maxim...

Thermoluminescence (TL) and optically stimulated luminescence (OSL) techniques were applied to quartz grains extracted from various depths in bricks taken from buildings in the village of Dolon', Kazakhstan, to determine the cumulative absorbed dose, DT. The measurements were performed in four laboratories (EU supported Measurement Group). The resu...

There is a growing public awareness of the risk of accidental radiation exposure due to ageing nuclear power installations, illegal dumping of nuclear waste and terrorist activities, and of the consequential health risks to populations in addition to social and economic disturbance extending beyond national boundaries. In the event of catastrophic...

Measurements of the response of thermoluminescent (TL) detectors after gamma ray doses high enough to observe signal saturation provide input to microdosimetric models which relate this gamma-ray response with the energy response after low doses of photons (gamma rays and low-energy X rays) and after high-LET irradiation. To measure their gamma ray...

The possibility of using a single grain OSL attachment system developed by the Risø National Laboratory (Roskilde, Denmark) for assessing the spatial distribution of radionuclides incorporated in human tissues was investigated. Detectors containing arrays of single grains of α-Al2O3:C powder (Landauer Inc., USA) were prepared using aluminium discs...

The luminescence of quartz extracted from recently fired building material is known to detect doses of few mGy and can be successfully employed in the case of large scale radiation exposures due to nuclear accidents or terrorist acts. One brick and two tiles (50-80 years range) collected from an urban settlement were used to test the realistic mini...

The single aliquot regenerative-dose (SAR) protocol is now widely used as a means of measuring the equivalent dose, and hence of dating, as applied to the optical stimulation of luminescence from quartz. For equivalent dose determination of heated quartz, a similar protocol but using thermoluminescence is presented and the results by this protocol...

The cumulative absorbed dose in fired-clay bricks collected from ten buildings in the populated contaminated settlement (137Cs, 1,470 kBq m(-2)) of Stary Vishkov, located 175 km downwind of the Chernobyl Nuclear Power Plant (NPP) in the Bryansk administrative region of Russia, was determined using luminescence techniques by five laboratories. At ea...

Electron paramagnetic resonance (EPR) measurements of tooth enamel can be used as an individual biological dosimeter for external dose assessment. However, the presence of 90Sr in the tooth tissues makes the task of interpreting EPR tooth dosimetry more complicated. The determination of the dose contribution of incorporated 90Sr in calcified tissue...

Luminescence retrospective dosimetry techniques have been applied with ceramic bricks to determine the cumulative external gamma dose due to fallout, primarily from the 1949 test, in populated regions lying NE of the Semipalatinsk Nuclear Test Site in Altai, Russia, and the Semipalatinsk region, Kazakhstan. As part of a pilot study, nine settlement...

There is an increasing need for efficient beta detectors to fulfil ICRU recommendations for new quantities especially in the field of medical physics and retrospective dosimetry. The thermoluminescence properties of thin LiF:Mg, Cu, P (GR-200F) tapes produced in 1998 by Sange Company, People's Republic of China, are investigated and compared with t...

The trap parameters (thermal activation energy Et and frequency factor s) of the glow peaks of quartz, occurring in the temperature range 420–520K and corresponding to intermediate energy levels, were evaluated using different and complementary methods of analysis: peak shift, isothermal decay and fractional glow curve. The values of Et and of s de...

The recent interest in the thermoluminescence of quartz extracted from unfired building materials, such as mortar and concrete for dose reconstruction applications, led to the requirement of an accurate determination of the lifetime of the intermediate glow peaks in this mineral. The prediction of the lifetimes of these peaks is helpful in establis...

The cumulative absorbed dose in bricks collected from six buildings in two heavily contaminated settlements (137Cs > 2,000 kBq m(-2)) located downwind of the Chernobyl Nuclear Power Plant was determined using luminescence techniques by six laboratories. The settlements, Vesnianoje in Ukraine and Zaborie in Russia, are located in, respectively, prox...

It has been observed that a certain type of telephone chip-card can be used as radiation detectors for individuals exposed to external gamma doses. The radiation dose responses of more than 200 chip-cards, produced by various companies since 1990, were investigated using infrared stimulated luminescence (IRSL). The radiation dose responses of some...

Absorbed doses were determined by thermoluminescence (TL) measurements for bricks from a height of 6 m from the south-western wall of the former mill in Metlino that faced the Techa river. Measurements of the internal beta-radiation and alpha-radiation in the brick samples and of radionuclide activities in soil samples from the Techa river valley w...

The potential of cementitious building materials for use in retrospective dosimetry has been investigated by examination of three types of Portland cement, fine grain polymineral samples extracted from concrete and quartz inclusions extracted from ‘ready-mix’ mortar and samples of mortar applied to the external walls of buildings. The results of X-...

An area located in the Southern Urals was contaminated in 1949-1956 as a result of radioactive waste releases into the Techa river by the Mayak Production Association. The external dose reconstruction of the Techa river dosimetry system (TRDS-2000) for the exposed population is based on an assessment of dose rates in air (DRA) obtained by modeling...

Measurements were carried out to quantify the dose rate delivered to samples due to leakage and cross-talk of the beta and alpha sources in various models of Riso TL/OSL readers; additionally the offset time was calculated. Highly sensitive alpha-Al2O3:C and CaF2:Mn dosemeters were used to investigate the impact on low environmental dose-rate asses...

Ceramic materials that are widely employed in dental prosthetics and repairs exhibit luminescent properties. Because of their use in the body, these materials are potentially of interest in situations where retrospective dosimetry for individuals is required but where monitoring was not planned. The luminescent properties of dental ceramics obtaine...

Knowledge of the mode of deposition (wet or dry) during the main fallout period following the Chernobyl accident in late April 1986 is one of the most important parameters in environmental reconstruction of the radiation dose to the thyroid from 113I following the accident. Meteorological data are available only for a small number of locations, but...

The Techa river region was highly contaminated due to radioactive releases from a nuclear production facility in the period from 1949 to 1956. The inhabitants of the upper Techa river settlements received significant doses of external radiation. The majority of the houses in the upper Techa river villages were demolished after the evacuation of the...

The use of thin-layer a-Al2O3:C thermoluminescence detectors (TLDs) for the assessment of current beta dose rate in human teeth due to 90Sr intake is investigated. The teeth used in this study were collected from members of the Techa river population who were exposed to radiation as a result of releases of the Mayak plutonium production facilities...

Bricks collected from a contaminated village (Muslyumovo) of the lower Techa river valley, Southern Urals, Russia, were measured using thermoluminescence and optically stimulated luminescence by four European laboratories and a U.S. laboratory to establish and compare the applied dose reconstruction methodologies. The bricks, collected from 60-100-...

Two methods of retrospective dosimetry for external exposures are reviewed. First, electron paramagnetic resonance (EPR or electron spin resonance, ESR) with teeth has its strengths in the determination of individual exposures, acute or protracted, that may have occurred several decades ago. The method is best studied for photon fields. The current...

The 210°C thermoluminescence (TL) peak of quartz, extracted from brick fragments of Somero sacristy (Finland), which were partly elements of construction, were used for the measurement of archaeological dose for the purpose of dating. The annual gamma dose-rate with cosmic component and beta dose rate of bricks were measured using two types of TLD...

The lifetime of the thermoluminescence (TL) peak of quartz observed at 210°C using 5°C/s heating rate is assessed using well-dated thermally isolated bricks from a monastery and exposed bricks from warmer climatic zones by comparing the absorbed dose obtained using the 210°C TL peak with those obtained from 310°C TL peak. The lifetimes of the 210°C...

Thermoluminescence (TL) is one of the most important physical methods used in archaeometry for dating ceramics. In this study the newly developed procedures based on the use of the 210 degrees C TL peak of quartz were applied to well-dated bricks of the church of the Tegernsee monastery in Bavaria. The resulting TL ages obtained from these well-dat...

It has frequently been observed that certain roof tiles and bricks, especially from relatively modern European buildings, do not contain enough quartz grains in a suitable grain size range to permit dose reconstruction using thermoluminescence (TL) or optically stimulated luminescence (OSL) methods. In this paper the feasibility of using infrared-s...

Dose evaluation procedures based on luminescence techniques were applied to 50 quartz samples extracted from bricks that had been obtained from populated or partly populated settlements in Russia and Ukraine downwind of the Chernobyl NPP. Determinations of accrued dose in the range ∼30–300 mGy were obtained using TL (210°C TL and pre-dose) and OSL...

IR stimulated luminescence signal from potassium and sodium feldspars were studied by linearly increasing the excitation power from zero to a maximum value during the readout. The peak shaped signals observed in both feldspars could be approximated using a linear combination of three first-order components as deduced by curve fitting. The thermal a...

The possibility of using thin-layer a-Al 2 O 3 :C thermoluminescence detectors (TLD) for the measurement of the annual beta dose from natural materials, considered for retrospective luminescence dosimetry, archaeometry and authenticity testing was checked. The annual beta doses from various materials including some porcelains, bricks and soils were...

Phototransferred thermoluminescence (PTTL) from α-Al2O3:C single crystals was studied using a blue light emitting diode (LED) for phototransfer of charges from deep traps to the main dosimetry trap. The dose response was found to be linear in the region from ∼5 mGy to ∼5 Gy. It was observed that the corresponding deep traps were located near 500°C...

The potential of thermoluminescence measurements of bricks from the contaminated area of the Techa river valley, Southern Urals, Russia, for reconstructing external exposures of affected population groups has been studied. Thermoluminescence dating of background samples was used to evaluate the age of old buildings available on the river banks. The...

In BeO ceramics, exposed to ionizing radiation, an intense OSL signal was observed. The properties of the signal and its behavior under various experimental conditions were investigated. It was found that the OSL signal is a composite signal and exhibits strong thermal quenching. The quenching energy was estimated as ∼0.5 eV. The excitation spectru...

Infrared (IR) stimulated luminescence from αAl2O3:C single crystals was investigated. The data show that the IR-stimulated luminescence curve contains at least two overlapping signals. One of the components was found to be both thermally and optically unstable whereas the second component was thermally stable and slowly decaying under constant sti...

We have observed that the 230°C TL glow peak in porcelain possesses the same pre-dose properties as the 110°C TL glow peak in quartz. The pre-dose effect is the increase in TL radiation sensitivity observed after irradiation and subsequent heating of quartz and the increase is proportional to the total absorbed radiation dose prior to heating. It i...

We present a new routine technique for retrospective dosimetry based on the pre-dose effect in optically stimulated luminescence (OSL). The porcelain electric-power insulators in this study using conventional OSL are found to be insensitive to radiation absorbed doses below 2 Gy, if they are measured some days after irradiation. Therefore, direct m...

Optically Stimulated Luminescence (OSL) from alpha-Al2O3:C was investigated using green light emitting diodes (LED) for excitation. Time resolved luminescence characteristics of the samples were studied by pulsing the LEDs during the readout. The effects of excitation light intensity, pulse width and readout temperature on the OSL signal were inves...

Accident dose estimation using the pre-dose technique on the 100°C peak in porcelain has been used since 1984. The disadvantage of this technique is that the reservoir traps appear to begin to saturate for doses around 1 Gy. This has limitations in regions of high fallout doses such as the contaminated settlements in the Chernobyl Exclusion Zone wi...

Porcelain is one of a group of promising building materials for reconstruction of dose from external gamma exposures. The type and lifetime of the recombination centres play an important role in the accuracy of dose assessment, especially if the accident occurred many years before laboratory measurements. The properties of the recombination centres...

The dose accumulated in bricks exposed to gamma radiation can be measured as a function of depth using luminescence methods. The dependence of dose on depth has the potential of providing information on the energy as well as on the angular distribution of the incident radiation, which could give indications on the configuration of the radiation sou...

The dosimetric properties of eight different fluorescent materials (FM) used in production of commercial fluorescent lamps were studied by thermoluminescence (TL). Taking into account the criteria for TL phosphors to be useful for radiation dosimetry, radiation sensitivity, thermal stability, shape of the glow curves, and effect of incandescence, U...

The analysis of depth-dose distributions in bricks sampled from walls in areas with nuclear waste or accident contamination has the potential of providing information on the energy and source configuration of the gamma-radiation that had been incident on the brick. In this study, a brick from a mill facing a shallow water reservoir of the contamina...

Laboratories using luminescence methods for dose reconstruction have to make interlaboratory source calibrations—initially this will be a single isotope beta or gamma source using one particular reference material. The procedure requires not only the administration of exact doses to the material but also the uniform handling of the dosimetric mater...

Archaeomagnetic dating was applied to two chalk-burning ovens from an early medieval noble-cemetery. Usually this method allows dating by the investigation of the geomagnetic declination and inclination through the thermoremanent magnetisation of baked clay in situ. However, in this case the method resulted in multiple dates since it was not possib...

The radiation response of natural materials and domestic articles was investigated by EPR and TL to select suitable materials for retrospective dose assessment in accident dosimetry. The thermal stability and the influence of UV-exposure to the radiation-induced EPR centres were investigated. Based on a required precision of ±20% for dosimetry the...

Irradiated egg shells exhibit a paramagnetic center at g = 2.0018. The center is stable up to temperatures of 150°C and against u.v. light. The center concentration as determined by electron paramagnetic resonance spectroscopy increases with absorbed dose. A dose range between 3 Gy–10 kGy was examined in which egg shells can serve as a dosimeter. P...

Optical grade crystals of lithium fluoride (LiF) have been developed for high level (50 MGy) and high temperature (250-degrees-C) dosimetry at GSF, based on optical density (OD) measurements. The measuring accuracy however was limited by a relatively high coefficient of variation (20%) for the interspecimen scattering of response. A method is descr...

Since 1968 the GSF has been carrying out research and development programmes for the final disposal of high activity waste in salt mines. The long term stability of the rock salt formations is assessed, by simulation of heat-producing waste by means of electrical heater and Co-60 sources. After the termination of the simulation experiment, vertical...

Environmental materials including bricks, tiles porcelain fixtures and a variety of other ceramic objects were collected in July, 1990, and August, 1991, from indoor and outdoor locations in the town of Pripyat, situated 3 km NW of the Chernobyl nuclear power plant. The samples were distributed to a number of laboratories to investigate their suita...

Since 1968 the GSF has been carrying out research and development programmes for the final disposal of high activity waste in salt mines. The long term stability of the rock salt formations is assessed, by simulation of heat-producing waste by means of electrical heater and ⁶⁰Co sources. After the termination of the simulation experiment, vertical...

Optical grade crystals of lithium fluoride (LiF) have been developed for high level (50 MGy) and high temperature (250 oC) dosimetry at GSF, based on optical density (OD) measurements. The measuring accuracy however was limited by a relatively high coefficient of variation (20%) for the interspecimen scattering of response. A method is described to...

A superlinear dose response in quartz so far has been observed with thermoluminescence (TL), but not with optical—or electron spin resonance (ESR)—spectroscopy. Superlinear increase of the E'1 centre concentration by irradiation of fused silica measured by ESR spectroscopy was recently reported. The E'1 centre is observed in all forms of quartz and...

It is shown that most of the natural products contain minute amounts of wind blown or intruding dust which can be separated and used to identify irradiated spices by measuring its thermoluminescence (TL). The method has several advantages over the use of the whole grains of spices. There is no spurious signal due to oxidation of the organic compone...

For the study of radiation effects in rock salt caused by highly radioactive waste in potential repository sites, it is essential that dosimetry can be carried out at high irradiation temperatures. Radiation induced colour centres in LiF crystals are shown to be appropriate for the assessment of gamma doses up to at least 50 MGy at irradiation temp...

For the study of radiation effects in rock salt caused by highly radioactive waste in potential repository sites, it is essential that dosimetry can be carried out at high irradiation temperatures. Radiation induced colour centres in LiF crystals are shown to be appropriate for the assessment of gamma doses up to at least 50 MGy at irradiation temp...

It is shown that most of the natural products contain minute amounts of wind blown or intruding dust which can be separated and used to identify irradiated spices by measuring its thermoluminescence (TL). The method has several advantages over the use of the whole grains of spices. There is no spurious signal due to oxidation of the organic compone...

Based on a literature survey, solid materials of crystalline, amorphous, sintered and ceramic origin were selected and investigated for dosimetric applicability up to 100 MGy at irradiation temperatures up to 200°C. The thermal stability of the radiation induced centers was studied by post-irradiation annealing. Metrologically, electron spin resona...

Geologically-formed calcite is a suitable material for dating, using thermoluminescence (TL) and electron-spin-resonance. However, many problems preclude accurate age determination. Some of these problems stem from different sample pre-treatment procedures, such as grinding, drilling or pre-heating. It has long been known that grinding can introduc...

A mammoth found in the southern part of Germany was dated by ESR spectroscopy. This dating method is based on the measurement of the accumulated dose in tooth enamel and assessment of the annual dose. The accumulated dose is obtained from the radiation induced ESR signal at g = 2.0018 of the enamel. The annual dose was first determined by measuring...

The application of Electron Spin Resonance (ESR) spectroscopy to age determination requires a radiation-sensitive sample as well as a clear and well-resolved ESR spectrum. The latter is affected in shape by influence parameters, e.g. grain size and thermal or chemical sample treatment. Such effects are studied for calcite, bone and volcanic materia...

The weathering of basaltic rocks is important in several regions throughout the world because of its soil forming capacity1,2. Basaltic minerals alter to various types of clay minerals depending on the climatic and chemical conditions of the environment. Investigation of the weathering of rocks involves detailed work consisting of thin section and...

Fission-track dating is applied to 16 obsidian artifacts from an archaeological excavation at Cayönü Tepesi in southeastern Anatolia. Since obsidian samples are rich in bubbles and inclusions, only the six most compact samples were found to be usable for fission-track measurements. Size studies of etched fossil- and induced-fission tracks showed th...

Interference by tribothermoluminescence and by regeneration thermoluminescence can be eliminated for burned flint if thin polished slices are used instead of the powders conventionally used in thermoluminescent measurements. Measurement of the internal and external radiation dose rates then makes possible the absolute determination of the date of p...

Individual doses to human teeth due to β-emitters incorporated in the dental mineral tissues as well as the additional contribution due to external radiation may be determined combining two different and complementary methods of analysis: Thermoluminescence (TL) and Electron Paramagnetic Resonance (EPR) spectroscopy. The former method provides info...

Validation of the new estimates of external dose is considered to be a critical factor in the continuing credibility of the TRDS-2000 results and the companion epidemiological studies they support. Recent successes in the measurement of doses by thermoluminescence (TL) of natural materials and by electron paramagnetic resonance (EPR) of tooth ename...

In a related paper at this conference, the role of luminescence methods in dose assessment in areas contaminated by fall-out from Chernobyl is discussed. This paper presents details of luminescence techniques developed to evaluate doses to ceramics in locations affected by fallout from the Chernobyl accident. The accrued dose is a combination of fa...

The following list covers some old measurements not included in previous lists and most of the samples measured at the Uppsala C 14 laboratory since the last list (Radiocarbon, 1967, v. 9, p. 454-470); samples utilized for determining the increase of the C 14 /C 12 ratio clue to explosion of nuclear devices are omitted

The following list covers some old measurements not included in previous lists and most of the samples measured at the Uppsala C 14 laboratory since the last list (Uppsala V) except for all of the samples utilized for determining the increase of the C 14 /G 12 ratio due to explosion of nuclear devices, and except for more than twenty samples measur...