dor_id: 41161

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100.1.#.a: Vega Carrillo, Héctor René; Torres Muhech, Celia

524.#.#.a: Vega Carrillo, Héctor René, et al. (2002). Low energy neutrons from a 239pube isotopic neutron source inserted in moderating media. Revista Mexicana de Física; Vol 48, No 005. Recuperado de https://repositorio.unam.mx/contenidos/41161

245.1.0.a: Low energy neutrons from a 239pube isotopic neutron source inserted in moderating media

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Facultad de Ciencias, UNAM

264.#.0.c: 2002

264.#.1.c: 2002-01-01

653.#.#.a: Isotopic neutron source; moderation; Monte Carlo method.

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-ND 4.0 Internacional, https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es, fecha de asignación de la licencia 2002-01-01, para un uso diferente consultar al responsable jurídico del repositorio por medio de rmf@ciencias.unam.mx

884.#.#.k: http://revistas.unam.mx/index.php/rmf/article/view/13835

041.#.7.h: eng

520.3.#.a: Several neutron applications share a common problem: the neutron source design. In this work MCNP computer code has been used to design a moderated 239PuBe neutron source to produce low energy neutrons. The design involves the source located at the center of a spherical moderator. Moderator media studied were light water, heavy water and a heterogeneous combination of light water and heavy water. Similar moderating features were found between the 24.5 cm-radius container filled with heavy water (23.0-cm-thick) and that made with light water (3.5-cm-thick) plus heavy water (19.5-cm-thick). A 239PuBe neutron source inserted in this moderator produces, at 27 cm, a neutron fluence of 1.8 x 10−4 n-cm−2 per source neutron, with an average neutron energy of 0.34 MeV, where 47.8 % have an energy ≤ 0.4 eV. A further study of this moderator was carried out using a reflector medium made of graphite. Thus, 15-cm-thickness reflector improves the neutron field producing a neutron fluence of 1.1 x 10−3 n-cm−2 per source neutron, whose average neutron energy is 0.098 MeV, where 75.8 % havean energy ≤ 0.4 eV.

773.1.#.t: Revista Mexicana de Física; Vol 48, No 005 (2002)

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Artículo

Low energy neutrons from a 239pube isotopic neutron source inserted in moderating media

Vega Carrillo, Héctor René; Torres Muhech, Celia

Facultad de Ciencias, UNAM, publicado en Revista Mexicana de Física, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Entidad o dependencia
Facultad de Ciencias, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Vega Carrillo, Héctor René, et al. (2002). Low energy neutrons from a 239pube isotopic neutron source inserted in moderating media. Revista Mexicana de Física; Vol 48, No 005. Recuperado de https://repositorio.unam.mx/contenidos/41161

Descripción del recurso

Autor(es)
Vega Carrillo, Héctor René; Torres Muhech, Celia
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Low energy neutrons from a 239pube isotopic neutron source inserted in moderating media
Fecha
2002-01-01
Resumen
Several neutron applications share a common problem: the neutron source design. In this work MCNP computer code has been used to design a moderated 239PuBe neutron source to produce low energy neutrons. The design involves the source located at the center of a spherical moderator. Moderator media studied were light water, heavy water and a heterogeneous combination of light water and heavy water. Similar moderating features were found between the 24.5 cm-radius container filled with heavy water (23.0-cm-thick) and that made with light water (3.5-cm-thick) plus heavy water (19.5-cm-thick). A 239PuBe neutron source inserted in this moderator produces, at 27 cm, a neutron fluence of 1.8 x 10−4 n-cm−2 per source neutron, with an average neutron energy of 0.34 MeV, where 47.8 % have an energy ≤ 0.4 eV. A further study of this moderator was carried out using a reflector medium made of graphite. Thus, 15-cm-thickness reflector improves the neutron field producing a neutron fluence of 1.1 x 10−3 n-cm−2 per source neutron, whose average neutron energy is 0.098 MeV, where 75.8 % havean energy ≤ 0.4 eV.
Tema
Isotopic neutron source; moderation; Monte Carlo method.
Idioma
eng
ISSN
2683-2224 (digital); 0035-001X (impresa)

Enlaces