A GEANT4 Study of a Gamma-ray Collimation Array

 

• J A López
  Physics Department, University of Texas at El Paso, El Paso, Texas, 79968 U.S.A.
• S S Romero González
  Physics Department, University of Texas at El Paso, El Paso, Texas, 79968 U.S.A.
• O Hernández Rodríguez
  Physics Department, University of Texas at El Paso, El Paso, Texas, 79968 U.S.A.
• J Holmes
  Physics Department, Arizona State University, Tempe, Arizona, 85281 U.S.A.
• R Alarcón
  Physics Department, Arizona State University, Tempe, Arizona, 85281 U.S.A.

DOI: https://doi.org/10.15415/jnp.2020.72028

Keywords: Proton therapy, Collimators, Gamma rays, GEANT4

Abstract

Proton beam therapy uses high-energy protons to destroy cancer cells which are still uncertain about where in the body they hit. A possible way to answer this question is to detect the gamma rays produced during the irradiation and determine where in the body they are produced. This work investigates the use of collimators to determine where the proton interactions occur. GEANT4 is used to simulate the gamma production of a source interacting with a collimator. Each event simulates a number of gammas obtained as a function of the position along the detector. Repeating for different collimator configurations can thus help determine the best characteristics of a detector device.

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Issue

Vol 7 No 2 (2020): Special Issue

 

How to Cite

J A López; S S Romero González; O Hernández Rodríguez; J Holmes; R Alarcón. A GEANT4 Study of a Gamma-Ray Collimation Array. J. Nucl. Phy. Mat. Sci. Rad. A. 2020, 7, 217-221.

Response to Neutrons and γ-rays of Two Liquid Scintillators

 

• Hector Rene Vega-Carrillo
  Academic Unit of Nuclear Studies of the University Autonomous of Zacatecas, C. Cipres 10,Fracc. La Peñuela, 98060 Zacatecas, Zac. Mexico.
• Martha Isabel Escalona-Llaguno
  Academic Unit of Nuclear Studies of the University Autonomous of Zacatecas, C. Cipres 10,Fracc. La Peñuela, 98060 Zacatecas, Zac. Mexico.
• Luis Hernandez-Adame
  CONACyT - Center for Biological Research of the Northwest, S.C., Av. Instituto Politecnico Nacional 195, Col. Playa Palo de Santa Rita Sur 23090 La Paz, BCS. Mexico
• Sergio M. Sarmiento-Rosales
  Academic Unit of Nuclear Studies of the University Autonomous of Zacatecas, C. Cipres 10,Fracc. La Peñuela, 98060 Zacatecas, Zac. Mexico.
• Claudia A. Márquez-Mata
  Academic Unit of Nuclear Studies of the University Autonomous of Zacatecas, C. Cipres 10,Fracc. La Peñuela, 98060 Zacatecas, Zac. Mexico.
• Guillermo E. Campillo-Rivera
  Academic Unit of Nuclear Studies of the University Autonomous of Zacatecas, C. Cipres 10,Fracc. La Peñuela, 98060 Zacatecas, Zac. Mexico.
• V.P. Singh
  Karanatak University, Dharwad, Karnataka, India-580003
• Teodoro Rivera-Montalvo
  Center for Research in Applied Science and Advanced Technology - Legaria Unit of IPN, Av. Legaria 694, Col. Irrigación, 11500 Ciudad de Mexico, Mexico
• Segundo Agustin Martínez-Ovalle
  Pedagogical and Technological University of Colombia, Tunja, Colombia

DOI: https://doi.org/10.15415/jnp.2019.62025

Keywords: Response, Liquid Scintillator, Detectors, neutrons, Gamma Rays, UltimaGold, Optiphase

Abstract

UltimaGold^TM AB and OptiphaseTrisafe are two liquid scintillators made by Perkin Elmer and EG & G Company respectively. Both are commercially promoted as scintillation detectors for α and β particles. In this work, the responses to γ-rays and neutrons of UltimaGold^TM AB and OptiphaseTriSafe liquid scintillators, without and with reflector, have been measured aiming to use these scintillators as γ-rays and neutron detectors. Responses to γ-rays and neutrons were measured as pulse shape spectra in a multichannel analyzer. Scintillators were exposed to gamma rays produced by ¹³⁷Cs, ⁵⁴Mn, ²²Na and ⁶⁰Co sources. The response to neutrons was obtained with a ²⁴¹AmBe neutron source that was measured to 25 and 50 cm from the scintillators. The pulse height spectra due to gamma rays are shifted to larger channels as the photon energy increases and these responses are different from the response due to neutrons. Thus, UltimaGold^TM AB and OptiphaseTrisafe can be used to detect γ-rays and neutrons.

 

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Issue

Vol 6 No 2 (2019) 

 

 

How to Cite

Hector Rene Vega-Carrillo; Martha Isabel Escalona-Llaguno; Luis Hernandez-Adame; Sergio M. Sarmiento-Rosales; Claudia A. Márquez-Mata; Guillermo E. Campillo-Rivera; V.P. Singh; Teodoro Rivera-Montalvo; Segundo Agustin Martínez-Ovalle. Response to Neutrons and γ-Rays of Two Liquid Scintillators. J. Nucl. Phy. Mat. Sci. Rad. A. 2019, 6, 171-178.