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| 2. |
- Abat, E., et al.
(författare)
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Study of the response of the ATLAS central calorimeter to pions of energies from 3 to 9 GeV
- 2009
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Ingår i: Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. - : Elsevier BV. - 0167-5087 .- 0168-9002 .- 1872-9576. ; 607:2, s. 372-386
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Tidskriftsartikel (refereegranskat)abstract
- A fully instrumented slice of the ATLAS central detector was exposed to test beams from the SPS (Super Proton Synchrotron) at CERN in 2004. in this paper, the response of the central calorimeters to pions with energies in the range between 3 and 9 GeV is presented. The linearity and the resolution of the combined calorimetry (electromagnetic and hadronic calorimeters) was measured and compared to the prediction of a detector simulation program using the toolkit Geant 4. (C) 2009 Elsevier B.V. All rights reserved.
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| 3. |
- Dias, Cintia Melazo, et al.
(författare)
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C-14, delta C-13 and total C content in soils around a Brazilian PWR nuclear power plant
- 2009
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Ingår i: Journal of Environmental Radioactivity. - : Elsevier BV. - 1879-1700 .- 0265-931X. ; 100:4, s. 348-353
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Tidskriftsartikel (refereegranskat)abstract
- Nuclear power plants release C-14 during routine operation mainly as airborne gaseous effluents. Because of the long half-life (5730 years) and biological importance of this radionuclide (it is incorporated in plant tissue by photosynthesis), several countries have monitoring programs in order to quantify and control these emissions. This paper compares the activity of C-14 in soils taken within I km from a Brazilian nuclear power plant with soils taken within a reference area located 50 km away from the reactor site. Analyses of total carbon, delta C-13 and Cs-137 were also performed in order to understand the local soil dynamics. Except for one of the profiles, the isotopic composition of soil organic carbon reflected the actual forest vegetation present in both areas. The Cs-137 data show that the soils from the base of hills are probably allocthonous. The C-14 Measurements showed that there is no accumulation due to the operation of the nuclear facility, although excess C-14 Was found in the litter taken in the area close to power plant. This indicates that the anthropogenic signal observed in the litter fall has not been transferred yet to the soil. This study is part of an extensive research programme in which other samples including air, vegetation and gaseous effluents (taken in the vent stack of the Brazilian nuclear power reactors Angra I and II) were also analyzed. The present paper aimed to evaluate how C-14 emissions from the nuclear power plant are transferred and stored by soils present in the Surroundings of the reactor site. This is the first study concerning anthropogenic 14C in soils in Brazil. (9) 2009 Elsevier Ltd. All rights reserved.
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| 4. |
- Melazo Dias, C, et al.
(författare)
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C-14 content in vegetation in the vicinities of Brazilian nuclear power reactors
- 2008
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Ingår i: Journal of Environmental Radioactivity. - : Elsevier BV. - 1879-1700 .- 0265-931X. ; 99:7, s. 1095-1101
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Tidskriftsartikel (refereegranskat)abstract
- Abstract in UndeterminedC-14 specific activities were measured in grass samples collected around Brazilian nuclear power reactors. The specific activity values varied between 227 and 299 Bq/kg C. Except for two samples which showed C-14 specific activities 22% above background values, half of the samples showed background specific activities, and the other half had a C-14 excess of 1-18%. The highest specific activities were found close to the nuclear power plants and along the main wind directions (NE and NNE). The activity values were found to decrease with increasing distance from the reactors. The unexpectedly high C-14 excess values found in two samples were related to the local topography, which favors C-14 accumulation and limits the dispersion of the plume. The results indicate a clear C-14 anthropogenic signal within 5 km around the nuclear power plants which is most prominent along northeastwards, the prevailing wind direction.
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| 5. |
- Odberg Pettersson, Karen, et al.
(författare)
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Strategies Applied by Women in Coping With ad-hoc Demands for Unauthorized User Fees During Pregnancy and Childbirth. A Focus Group Study From Angola.
- 2007
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Ingår i: Health Care for Women International. - : Informa UK Limited. - 1096-4665 .- 0739-9332. ; 28:3, s. 46-224
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Tidskriftsartikel (refereegranskat)abstract
- Our aim in this study was to explore women's responses to reported ad-hoc demands for unauthorized user fees during pregnancy and childbirth in Luanda, Angola. Ten focus group discussions were conducted and data were analysed using grounded theory. Women were found to apply six strategies as they "endeavored to cope with demands for unauthorized user fees" (core category): (i) blowing the whistle, (ii) searching for comprehension, (iii) manipulating the system, (iv) bargaining, (v) extending the limits, and (vi) balancing. The system of unauthorized user fees appears to be a symptom of a deeper structural problem, which requires multifaceted and long-term interventions such as insti-tutional reforms and clear policies on accountability and transparency. Better resource availability for the MHC sector is required in order to secure adequate salaries to maternal health care providers. The fact that unethical behavior is unveiled implies that interventions also need to target the national midwifery training.
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