Showing papers in "Radiation Measurements in 2005"

TL;DR: The activity concentrations and the gamma-absorbed dose rates of the terrestrial naturally occurring radio nuclides viz. 226Ra, 232Th and 40K were determined in soil samples collected from some areas of Punjab and Himachal Pradesh, using gamma ray spectrometry.

TL;DR: In this article, the authors examined the contribution from incomplete zeroing of any prior trapped charge (including signals arising from thermal transfer), heterogeneity in dosimetry, and instrument reproducibility.

TL;DR: In this paper, the authors used a factorial experiment to study systematic and random differences between measured OSL palaeodoses for a variety of quartz samples, including samples that have absorbed either a large or small natural or laboratory-induced radiation dose, either with or without prior heating or bleaching.

TL;DR: In this paper, the petrographic characteristics of commercial granites with their corresponding dose rates for natural radioactivity have been analyzed in Brazil, where thorium, uranium and potassium concentrations have been reported in several commercial granite samples.

TL;DR: In this paper, a modification to the standard single-aliquot regenerative-dose (SAR) procedure is introduced to correct for sensitivity changes experienced during repeated measurement cycles and recover known laboratory doses.

TL;DR: In this article, an automatic station for soil gas monitoring was set up on an active fault zone of SW Taiwan, and some spike-like anomalous high radon and thoron concentrations could be observed.

TL;DR: In this article, the gamma ray spectrometer was applied using high purity germanium gamma-ray detector and a PC-based MCA for the investigation of amount of radioactivity in the barren soil in Rakh Dera Chal near the city of Lahore in the Punjab province of Pakistan.

TL;DR: In this article, the concentrations of radioactive elements in K-feldspar grains were studied using electron micro-probe for potassium (K) content and inductively coupled plasma mass spectrometer (ICP-MS) for uranium (U), thorium (Th) and rubidium (Rb) contents.

TL;DR: A representative National Survey to evaluate the exposure to natural sources of ionizing radiation in dwellings was conducted in all the 21 Italian Regions from 1989 to 1998, and the complete results are reported in this paper.

TL;DR: A new microscope system, the HSP-1000, is developed that uses a line sensor camera in place of a traditional CCD camera for high speed image acquisition that achieves image acquisition speeds that are 50–100 times faster than conventional CCD-based microscope systems.

TL;DR: In this article, the authors investigated the possible connection between eventual radon/helium anomalies and active faults and found that radon and helium together can act as a powerful tool for the detection and mapping of active fault zones.

TL;DR: In this article, eight kinds of building materials collected from Xi'an, China were analyzed for the natural radioactivity of 226 Ra, 232 Th and 40 K using γ-ray spectroscopy.

TL;DR: A glimpse on the present status of ion track technology is provided: irradiation, etching and electro-replication of single and multiple ion tracks. as mentioned in this paper The uses of an electrolytic cell for single and counted track studies are sketched.

TL;DR: In this paper, the completeness of optical resetting of 46 modern-age quartz samples from a variety of depositional environments was examined, and all equivalent dose (D e ) estimates were 5 Gy, with the majority of aeolian samples 0.1 Gy, and fluvial samples 1 Gy.

TL;DR: The dependence of laboratory beta dose rate on grain size was measured using a Riso TL-DA-15 reader with the latest model of source housing (Radiat. Appl. Meas. 28 (1977) 625) and this difference is attributed to source geometry as mentioned in this paper.

TL;DR: In this paper, the reduction of fast component optically stimulated luminescence (OSL) dating of quartz by high temperature infrared (IR) stimulation is investigated, and it is shown that, in the temperature range from 120 − 190 ∘ C, it is possible to deplete the fast component preferentially using IR stimulation.

TL;DR: In this paper, the gamma dose rates of ten beaches in the island of Brazilian southeastern cost were measured in situ using an environmental radiation detector, and the results showed that the annual effective doses were 0.15 ± 0.03

TL;DR: In this article, the authors reported the first TL studies of Dy 3 + doped SrB 4 O 7 compound by β-ray irradiation for the first time. And the results showed that the TL-dose response of the doped polycrystalline powder sample to β -ray radiation in the range from 50 to 250kGy for radiation processing dose levels is almost linearity.

TL;DR: In this article, a single-crystal α-Al 2 O 3 (10×10 mm 2,0.4 mm thick) was treated in vacuum at temperatures below its melting point in the presence of graphite.

TL;DR: In this paper, modifications induced by 60Co γ -rays in the Lexan polycarbonate plastic track detector have been studied by using FTIR and UV-visible spectroscopic techniques.

TL;DR: A sensitive sample sampling technique was used to measure the equilibrium equivalent concentration of radon progeny, EEC Rn, outdoors at Bathinda, Punjab (India), over a period of 6 months as discussed by the authors.

TL;DR: An apatite fission track study of crystalline rocks underlying sedimentary basins in northeastern Brazil indicate that crustal blocks that occur on opposite sides of a geological fault experienced different thermal histories.

TL;DR: In this article, the radon exhalation rates per unit area from these granite samples varied from below the minimum detection limit up to 13.1 Bq m - 2 h - 1 with an average of 1.5 ± 1.9 (1 σ ) Bqm - 2h - 1.

TL;DR: In this paper, electron paramagnetic resonance (EPR), thermally stimulated luminescence (TSL), photoacoustic spectrometric (PAS) and fluorescence studies were conducted on gamma-irradiated MgB4O7: Tm phosphor.

TL;DR: In this article, the track parameters were first calculated using a track development model with a published V function, and by assuming a removed active layer of 6.54m, the relationship between the removed layer and the track diameter ofnormally incident 3 MeV -particles was then derived for the V function specifically determined for the LR 115 detectors used for the experiments.

TL;DR: In this paper, a method is proposed to prepare replicas of tracks from α particles in the CR-39 SSNTDs and to measure their heights using atomic force microscopy (AFM).

TL;DR: In this article, the authors report on OSL dose distributions derived from small-aliquot and single grains of quartz in young fluvial sediments sampled from the Penner River basin, South India.

TL;DR: In this paper, Fourier transform IR spectroscopy (FT-IR) was used to study the effect of high doses of γ-rays at high doses ranging from 5 × 10 4 to 4 × 10 5 Gy.

TL;DR: In this paper, the radon alpha activity concentration has been measured in 28 homes in the Erbil Capital-Iraqi Kurdistan region during the autumn season by using time-integrated passive radon dosimeters containing CR-39 solid state nuclear track detectors.