Isaac Tobin

University College Dublin, School of Physics, Post-Doc

Dublin Institute of Technology, School of physics, Alumnus

Followers

Following

Public Views

PhD BSc AMInstP
Currently postdoctoral research fellow, Space Science & Advanced Materials, University College Dublin on novel gamma-ray scintillators under contract from European Space Agency.
Alumnus of Trinity College Dublin (2015) and Dublin Institute of Technology (2009).

PhD in physics with Prof. James G. Lunney, on laser triggered electrical discharge plasma applications, as a member of the Photonics Group, TCD (https://www.tcd.ie/Physics/photonics). The research was funded by Science Foundation Ireland.

Research has centred on electrical discharge triggered by laser produced plasma, involving laser ablation, high voltage discharge, spectroscopy, vacuum science, along with many other fields.
This research was funded by Science Foundation Ireland under a project to characterise and study novel sources of extreme ultraviolet (EUV) light for metrology and lithography.
Phone: 00353-(0)18964093
Address: Dublin, Ireland.

less

Nicole Herbots

Arizona State University

Estela Blaisten-Barojas

George Mason University

Yavor Shopov

Sofia University "St. Kliment Ohridski"

Tony Donnelly

University College Dublin

Mustafa Moumni

University of Batna

M. Reza Dousti

Universidade Federal Rural de Pernambuco

Syed Mohammad Hasan Ahmer

Yuc

SIVA UMAPATHY

Indian Institute of Science

Assoc. Prof. Dr. Mohd Natashah Norizan

Universiti Malaysia Perlis (UniMAP)

Mustafa Odabasoglu

Pamukkale University

InterestsView All (14)

Uploads

Papers by Isaac Tobin

Localisation of gamma-ray interaction points in thick monolithic CeBr 3 and LaBr 3 :Ce scintillators

Nuclear Instruments and Methods in Physics Research, Feb 1, 2017

Localisation of gamma-ray interaction points in monolithic scintillator crystals can simplify the... more Localisation of gamma-ray interaction points in monolithic scintillator crystals can simplify the design and improve the performance of a future Compton telescope for gamma-ray astronomy. In this paper we compare the position resolution of three monolithic scintillators: a 28 × 28 × 20 mm 3 (length × breadth × thickness) LaBr 3 :Ce crystal, a 25 × 25 × 20 mm 3 CeBr 3 crystal and a 25 × 25 × 10 mm 3 CeBr 3 crystal. Each crystal was encapsulated and coupled to an array of 4 × 4 silicon photomultipliers through an optical window. The measurements were conducted using 81 keV and 356 keV gamma-rays from a collimated 133 Ba source. The 3D position reconstruction of interaction points was performed using artificial neural networks trained with experimental data. Although the position resolution was significantly better for the thinner crystal, the 20 mm thick CeBr 3 crystal showed an acceptable resolution of about 5.4 mm FWHM for the x and y coordinates, and 7.8 mm FWHM for the z-coordinate (crystal depth) at 356 keV. These values were obtained from the full position scans of the crystal sides. The position resolution of the LaBr 3 :Ce crystal was found to be considerably worse, presumably due to the highly diffusive optical interface between the crystal and the optical window of the enclosure. The energy resolution (FWHM) measured for 662 keV gamma-rays was 4.0% for LaBr 3 :Ce and 5.5% for CeBr 3 . The same crystals equipped with a PMT (Hamamatsu R6322-100) gave an energy resolution of 3.0% and 4.7%, respectively.

Isaac Tobin

Uploads

Papers by Isaac Tobin

Log In