| dc.creator | Montes, María Luciana | |
| dc.creator | Taylor, Marcela Andrea | |
| dc.creator | Mercader, Roberto C. | |
| dc.creator | Sives, Flavio Rubén | |
| dc.creator | Desimoni, Judith | |
| dc.date | 2010 | |
| dc.date | 2019-10-03T15:57:25Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/82622 | |
| dc.identifier | issn:17426588 | |
| dc.description | The depth profile concentration of both natural and anthropogenic gamma-ray-emitter nuclides were determined in soil samples collected in an area located at 34° 54.452′ S, 58° 8.365′ W, down to 50 cm in depth, using an hyper-pure Ge spectrometer. The soil samples were also characterized by means of Mössbauer spectrometry and X-ray diffraction. The activities of <SUP>238</SUP>U and <SUP>232</SUP>Th natural chains remain constant in depth at 41 Bq/kg and 46 Bq/kg, respectively, while the <SUP>40</SUP>K activity increases from 531 Bq/kg to 618 Bq/kg between 2.5 cm y 25.5 cm of depth. The only anthropogenic detected nuclide is <SUP>137</SUP>Cs, whose activity changes form 1.4 Bq/kg to values lower than the detection limit (L<SUB>D</SUB>) for depths below 25 cm, exhibiting a maximum at 10 cm beneath the surface. The Mössbauer spectra show two magnetic sextets associated with α-Fe<SUB>2</SUB>O<SUB>3</SUB> and Fe<SUB>3</SUB>O<SUB>4</SUB>, as well as two Fe<SUP>+3</SUP> Fe<SUP>+2</SUP> doublets, probably originated in octahedral and tetrahedral sites of paramagnetic phases. The Fe<SUP>3+</SUP> paramagnetic signal relative fraction increases up to 82% at the expense of the α-Fe<SUB>2</SUB>O<SUB>3</SUB> one when de depth increases. No correlation between Fe<SUB>3</SUB>O<SUB>4</SUB> and the <SUP>137</SUP>Cs was identificated. | |
| dc.description | Facultad de Ciencias Exactas | |
| dc.description | Instituto de Física La Plata | |
| dc.format | application/pdf | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
| dc.rights | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
| dc.subject | Ciencias Exactas | |
| dc.subject | Mossbauer spectroscopy | |
| dc.subject | Gamma rays | |
| dc.subject | Soils | |
| dc.subject | Buenos Aires | |
| dc.subject | Argentina | |
| dc.title | Hyperfine and radiological characterization of soils of the province of Buenos Aires, Argentina | |
| dc.type | Articulo | |
| dc.type | Articulo | |
