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MLEM Neutron Spectra Unfolding in a Radiotherapy Bunker Using Bonner Sphere Spectrometer

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MLEM Neutron Spectra Unfolding in a Radiotherapy Bunker Using Bonner Sphere Spectrometer

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dc.contributor.author Oliver-Gil, Sandra es_ES
dc.contributor.author Morató-Rafet, Sergio es_ES
dc.contributor.author Juste Vidal, Belen Jeanine es_ES
dc.contributor.author Miró Herrero, Rafael es_ES
dc.contributor.author Verdú Martín, Gumersindo Jesús es_ES
dc.contributor.author N.Tejedor es_ES
dc.contributor.author J. Perez-Calatayud es_ES
dc.date.accessioned 2024-01-03T19:04:19Z
dc.date.available 2024-01-03T19:04:19Z
dc.date.issued 2023-06 es_ES
dc.identifier.issn 0029-5639 es_ES
dc.identifier.uri http://hdl.handle.net/10251/201428
dc.description This is an Accepted Manuscript of an article published by Taylor & Francis in Nuclear Science and Engineering on 2023, available online: http://www.tandfonline.com/10.1080/00295639.2023.2192312 es_ES
dc.description.abstract [EN] High-energy radiotherapy treatments of a medical Linear Accelerator (LinAc) generate secondary neutrons that can produce health damage on the human body as the induction of secondary cancers. The energy spectrum of these neutrons must be determined to estimate the extra dose received by patients inside a radiotherapy room during radiotherapy treatment. To quantify the neutron production, a Ludlum Bonner sphere spectrometer (BSS) is used for measurement at different points of a LinAc bunker at the Hospital Universitari i Politecnic La Fe de Valencia. With the neutron measured data and a set of response detector curves obtained by Monte Carlo simulations with MCNP6.1.1, the Maximum Likelihood Expectation Maximization unfolding method is used to unfold the energy neutron spectrum. Unfolded neutron spectra at different locations were compared to those obtained by Monte Carlo simulation of the same setup, showing the same energetic behavior. The fluence rate decreases with source distance, and the shape changes from a fast neutron peak in the nearest LinAc head location to a prominent thermal neutron peak in the bunker maze region. Moreover, the neutron ambient equivalent dose was obtained from the unfolded spectra and compared to Berthold detector measurements, being consistent. es_ES
dc.description.sponsorship This study was partially supported by the program Ayudas para la promoción de empleo joven e implantación de la Garantía Juvenil en I+D+I, Plan Estatal de Investigación Científica y Técnica e Innovación 2017-2020 from the Iniciativa de Empleo Juvenil (IEJ) and the Fondo Social Europeo (FSE), grant number: PEJ2018-001727-A-AR. es_ES
dc.language Inglés es_ES
dc.publisher Taylor & Francis es_ES
dc.relation.ispartof Nuclear Science and Engineering es_ES
dc.rights Reconocimiento - No comercial (by-nc) es_ES
dc.subject Bonner sphere spectrometer es_ES
dc.subject MCNP6 es_ES
dc.subject Neutrons es_ES
dc.subject Dose es_ES
dc.subject Radiotherapy es_ES
dc.subject.classification FISICA APLICADA es_ES
dc.subject.classification INGENIERIA NUCLEAR es_ES
dc.title MLEM Neutron Spectra Unfolding in a Radiotherapy Bunker Using Bonner Sphere Spectrometer es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1080/00295639.2023.2192312 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/ESF//PEJ2018-001727-A-AR//Ayudas para la promoción de empleo joven e implantación de la Garantía Juvenil en I+D+I/ es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials es_ES
dc.description.bibliographicCitation Oliver-Gil, S.; Morató-Rafet, S.; Juste Vidal, BJ.; Miró Herrero, R.; Verdú Martín, GJ.; N.Tejedor; J. Perez-Calatayud (2023). MLEM Neutron Spectra Unfolding in a Radiotherapy Bunker Using Bonner Sphere Spectrometer. Nuclear Science and Engineering. https://doi.org/10.1080/00295639.2023.2192312 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1080/00295639.2023.2192312 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.relation.pasarela S\496700 es_ES
dc.contributor.funder Agencia Estatal de Investigación es_ES


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