Optimization of the slow neutron detector array in the thermal neutron backscattering technique

Abstract: In Colombia, after decades of conflict, many geographical areas are believed to be contaminated by antipersonnel mines (MAP), Improvised Explosive Devices (IED) and other explosive ordnance. Mines laid by non-state armed groups are found around schools, houses and roads in rural areas. In...

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Autores:
Gómez Muñoz, Juansebastian
Tipo de recurso:
Fecha de publicación:
2017
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/60851
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/60851
http://bdigital.unal.edu.co/59232/
Palabra clave:
53 Física / Physics
Neutron backscattering technique
Explosive detection
Humanitarian demining
Soils
Dispersión de neutrones
Detección de explosivos
Desminado humanitario
Suelos
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
id UNACIONAL2_ef9cc4d5bb9c86c6b1645cb92be09e60
oai_identifier_str oai:repositorio.unal.edu.co:unal/60851
network_acronym_str UNACIONAL2
network_name_str Universidad Nacional de Colombia
repository_id_str
dc.title.spa.fl_str_mv Optimization of the slow neutron detector array in the thermal neutron backscattering technique
title Optimization of the slow neutron detector array in the thermal neutron backscattering technique
spellingShingle Optimization of the slow neutron detector array in the thermal neutron backscattering technique
53 Física / Physics
Neutron backscattering technique
Explosive detection
Humanitarian demining
Soils
Dispersión de neutrones
Detección de explosivos
Desminado humanitario
Suelos
title_short Optimization of the slow neutron detector array in the thermal neutron backscattering technique
title_full Optimization of the slow neutron detector array in the thermal neutron backscattering technique
title_fullStr Optimization of the slow neutron detector array in the thermal neutron backscattering technique
title_full_unstemmed Optimization of the slow neutron detector array in the thermal neutron backscattering technique
title_sort Optimization of the slow neutron detector array in the thermal neutron backscattering technique
dc.creator.fl_str_mv Gómez Muñoz, Juansebastian
dc.contributor.author.spa.fl_str_mv Gómez Muñoz, Juansebastian
dc.contributor.spa.fl_str_mv Cristancho Mejía, Fernando
dc.subject.ddc.spa.fl_str_mv 53 Física / Physics
topic 53 Física / Physics
Neutron backscattering technique
Explosive detection
Humanitarian demining
Soils
Dispersión de neutrones
Detección de explosivos
Desminado humanitario
Suelos
dc.subject.proposal.spa.fl_str_mv Neutron backscattering technique
Explosive detection
Humanitarian demining
Soils
Dispersión de neutrones
Detección de explosivos
Desminado humanitario
Suelos
description Abstract: In Colombia, after decades of conflict, many geographical areas are believed to be contaminated by antipersonnel mines (MAP), Improvised Explosive Devices (IED) and other explosive ordnance. Mines laid by non-state armed groups are found around schools, houses and roads in rural areas. In some cases only the mined area is established however the exactly location of mines is unknown, this situation generates a latent threat to the civilian population. One of the nuclear techniques that are being investigated in different countries in the field of explosives detection and demining is the Thermal Neutron Backscattering Technique (TNBT). The TNBT is based on the fact that the buried target is Hydrogen-rich and therefore if it is in a media with different Hydrogen content and it is exposed to a fast neutron source, the number of backscattered thermal neutrons produced by the moderation process will give us a signal from which we can infer the presence of the Hydrogen-rich target. The TNBT has been used in controlled conditions to locate buried hydrogen-rich objects using a Cf-252 fast neutron source and two He-3 neutron detector arrays, also in different types of soil (sand and farming soil). The results of experiments are presented with the purpose of showing different possibilities of the detector arrays location, number of detectors per array, dependence with different soils and the best performance in the data analysis.
publishDate 2017
dc.date.issued.spa.fl_str_mv 2017-11-15
dc.date.accessioned.spa.fl_str_mv 2019-07-02T19:16:39Z
dc.date.available.spa.fl_str_mv 2019-07-02T19:16:39Z
dc.type.spa.fl_str_mv Trabajo de grado - Maestría
dc.type.driver.spa.fl_str_mv info:eu-repo/semantics/masterThesis
dc.type.version.spa.fl_str_mv info:eu-repo/semantics/acceptedVersion
dc.type.content.spa.fl_str_mv Text
dc.type.redcol.spa.fl_str_mv http://purl.org/redcol/resource_type/TM
status_str acceptedVersion
dc.identifier.uri.none.fl_str_mv https://repositorio.unal.edu.co/handle/unal/60851
dc.identifier.eprints.spa.fl_str_mv http://bdigital.unal.edu.co/59232/
url https://repositorio.unal.edu.co/handle/unal/60851
http://bdigital.unal.edu.co/59232/
dc.language.iso.spa.fl_str_mv spa
language spa
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Sede Bogotá Facultad de Ciencias Departamento de Física
Departamento de Física
dc.relation.references.spa.fl_str_mv Gómez Muñoz, Juansebastian (2017) Optimization of the slow neutron detector array in the thermal neutron backscattering technique. Maestría thesis, Universidad Nacional de Colombia - Sede Bogotá.
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_abf2
dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
dc.rights.uri.spa.fl_str_mv http://creativecommons.org/licenses/by-nc/4.0/
dc.rights.accessrights.spa.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial 4.0 Internacional
Derechos reservados - Universidad Nacional de Colombia
http://creativecommons.org/licenses/by-nc/4.0/
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.mimetype.spa.fl_str_mv application/pdf
institution Universidad Nacional de Colombia
bitstream.url.fl_str_mv https://repositorio.unal.edu.co/bitstream/unal/60851/1/1022325269.2017.pdf
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repository.name.fl_str_mv Repositorio Institucional Universidad Nacional de Colombia
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spelling Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Cristancho Mejía, FernandoGómez Muñoz, Juansebastian5db1c5bb-b930-4cfd-b8c5-ccddef9c7bc83002019-07-02T19:16:39Z2019-07-02T19:16:39Z2017-11-15https://repositorio.unal.edu.co/handle/unal/60851http://bdigital.unal.edu.co/59232/Abstract: In Colombia, after decades of conflict, many geographical areas are believed to be contaminated by antipersonnel mines (MAP), Improvised Explosive Devices (IED) and other explosive ordnance. Mines laid by non-state armed groups are found around schools, houses and roads in rural areas. In some cases only the mined area is established however the exactly location of mines is unknown, this situation generates a latent threat to the civilian population. One of the nuclear techniques that are being investigated in different countries in the field of explosives detection and demining is the Thermal Neutron Backscattering Technique (TNBT). The TNBT is based on the fact that the buried target is Hydrogen-rich and therefore if it is in a media with different Hydrogen content and it is exposed to a fast neutron source, the number of backscattered thermal neutrons produced by the moderation process will give us a signal from which we can infer the presence of the Hydrogen-rich target. The TNBT has been used in controlled conditions to locate buried hydrogen-rich objects using a Cf-252 fast neutron source and two He-3 neutron detector arrays, also in different types of soil (sand and farming soil). The results of experiments are presented with the purpose of showing different possibilities of the detector arrays location, number of detectors per array, dependence with different soils and the best performance in the data analysis.Resumen: En Colombia, después de décadas de conflicto, se cree que muchas áreas geográficas están contaminadas por Minas Antipersonal (MAP), Municiones sin Explosionar (MUSE), Artefactos Explosivos Improvisados (AEI) y otros artefactos explosivos. Las minas colocadas por grupos armados se encuentran alrededor de las escuelas, las casas y caminos en zonas rurales. En algunos casos sólo se establece la zona minada pero la ubicación exacta de las minas es desconocida, esta situación genera un peligro latente para la población civil. Una de las técnicas que usa las radiaciones nucleares y que está siendo investigada en diferentes países en el campo de la detección de explosivos y desminado es la denominada retrodispersión de neutrones térmicos (TNBT, por sus siglas en inglés). La TNBT se basa en el hecho de que el objeto enterrado es rico en hidrógeno y por lo tanto si se encuentra en un medio con diferentes contenidos de hidrógeno y se expone a una fuente de neutrones rápidos, el número de neutrones térmicos retrodispersados producidos por el proceso de moderación nos dará una señal de la que podemos inferir la presencia del objeto rico en hidrógeno. La TNBT se ha utilizado en condiciones controladas para localizar objetos ricos en hidrógeno enterrados, utilizando una fuente de neutrones rápidos y dos arreglos de detectores de neutrones de He-3, también en diferentes tipos de suelo (arena y suelo franco o tierra de cultivo) y diferentes contenidos de agua del suelo. Los resultados de los experimentos son presentados con el propósito de mostrar las diferentes posibilidades de la ubicación de los detectores, el número de detectores por conjunto, la dependencia con diferentes suelos y el mejor rendimiento en el análisis de datos.Maestríaapplication/pdfspaUniversidad Nacional de Colombia Sede Bogotá Facultad de Ciencias Departamento de FísicaDepartamento de FísicaGómez Muñoz, Juansebastian (2017) Optimization of the slow neutron detector array in the thermal neutron backscattering technique. Maestría thesis, Universidad Nacional de Colombia - Sede Bogotá.53 Física / PhysicsNeutron backscattering techniqueExplosive detectionHumanitarian deminingSoilsDispersión de neutronesDetección de explosivosDesminado humanitarioSuelosOptimization of the slow neutron detector array in the thermal neutron backscattering techniqueTrabajo de grado - Maestríainfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/acceptedVersionTexthttp://purl.org/redcol/resource_type/TMORIGINAL1022325269.2017.pdfapplication/pdf10704740https://repositorio.unal.edu.co/bitstream/unal/60851/1/1022325269.2017.pdf7672ec6d5442d8581613310d5cb2ba79MD51THUMBNAIL1022325269.2017.pdf.jpg1022325269.2017.pdf.jpgGenerated Thumbnailimage/jpeg4438https://repositorio.unal.edu.co/bitstream/unal/60851/2/1022325269.2017.pdf.jpg2e51c848a439144271d3797b16b6117aMD52unal/60851oai:repositorio.unal.edu.co:unal/608512023-04-09 23:05:03.001Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co