[en] ^113mIn produced by ¹¹³Sn-^113mIn producer as a tracer has been applied in the study of the movement of underground water flow. TLD made up of CaSO₄ (Tm) in glass tubes has been chosen as nuclear detector to determine the direction of the underground water flow in a borehole. The reult shows that ^113mIn as a tracer to determine the direction of underground water flow is suitable for some special sites such as the rock stratum

[en] This paper describes a preliminary low-level radiation from measurement using TLD of CaSO₄:Tm glass tube. The results obtained from measuring radiation background inside a lead chamber in a cave and around our institute were compared with that obtained with the PTB-7201 scintillation dose-ratemeter and the cyclindrical high pressure ionization chamber of NCIRP

[en] An intelligent radiation dosimeter, with such functions as signal collection and data processing, store, print and display, has been developed. Its detector is made of a micro-semiconductor. This dosimeter can be used in laboratories for agricultural ⁶⁰Co irradiators, radiotherapeutic facilities and other small and medium-size ⁶⁰Co irradiators

[en] Several problems concerning the computation of absorbed dose from ionizing photon interactions with different organic materials have been studied. The mass energy-absorption coefficients for several traditional Chinese medicines and staple crops are reported. The linear relation between the percent by weight of hydrogen in animal and plant tissues and other organic materials and the mass energy-absorption coefficients values are tabulated, with a correlation coefficient 0.9999. The elemental constituents in organic ash content are analyzed quantitatively and their μ_en/ρ values are computed, so that the simple cavity theory correction to absorbed doses due to x and γ-radiation may be applied. (author)

[en] Several questions concerning absorbed dose have been studied. The mass energy-absorption coeffients μen/ρ values are found out. It's correlation coefficient r is 0.999. For the above materials, the element composition of ash is analyzed and their μen/ρ are tabulated. Their equivalent has been studied. Finally, the restriction on D₁/D₂ = (μen/ρ)₁/(μen/ρ)₂ are disussed

[en] A p-n junction semiconductor may be used as a radiation detector. Such a study is reported here. Its dosimetry specificities, include dose, dose rate, precision, stability, depth dose distribution and directional response, were studied in a ⁶⁰Co field. It is shown that the detector performs well. It exhibited a precision of ±0.05% (std dev.) and a stability of ±0.16% (std dev.), respectively. (author)

[en] Plate window glass may be used as a routine high-dose dosimeter. Samples were tested in terms of their response to ⁶⁰Co γ-radiation at various doses, dose rates, temperatures, relative humidities, thickness and light, for these influences might be encountered in typical radiation processing environments. The analysis is based on spectrophotometry in the visible absorption spectrum. The linear response range was found to be approximately 0.2 to 50kGy, with no appreciable dose rate dependence over dose rates from 60Gy/h to 2400Gy/h, no appreciable temperature dependence for irradiation at temperatures in the range 0⁰C to 50⁰C and no appreciable relative humidity dependence from the dried condition (about r.h. 0%) to moist condition (in water). The reproducibility of dose assessment for the dosimeters selected randomly from several batches is about ± 3 percent. (author)

[en] A new kind of TL detector is reported, which materials, preparation method, dosimetric property and applicability were described. The TL detector has a dimension φ125μm x 1 cm and a weight about 0.34 mg, with μ_en/ρ (⁶⁰Co) = 0.0266 cm²/g, Z_e = 11.82, response range 10^-1-10⁴ Gy and precision ±5%

[en] The ampoule-type Fricke dosimeter and factors that affect its uses were discussed. The molar extinction coefficient for Fe³⁺ at 302 nm was determined to be 2166.7 l/mol·cm (25 deg C) and the conversion factor for absorbence-absorbed dose was obtained to be 280.7 Gy/ΓAbs. The technique of pretreatment, sealing of glass ampoule, and prepartion of Fricke dosimeter were standardized,so that the precision of measured valuse has been effectively controlled within ±1.0% (relative standard deviation of an average value at 95% confidence level), and overall uncertainty within ±2.5%

[en] A description of dosimetric properties and the preparation method of an optical fibre-type silicate glass thermoluminescent detector (TLD) is presented. Results showed that this new phosphor is a good one which could be used as a routine dosimeter in the range 10^-1-10³ Gy. The preparation method is a new one which differs greatly from all previous ones. Furthermore this kind of detector is small and of low weight. (orig.)