Triplet harvesting plastic scintillators with neutron-gamma pulse shape discrimination

Edgar V. van Loef; Patrick Feng; Gary Markosyan; Urmila Shirwadkar; Patrick Doty; Kanai Shah

doi:10.1117/12.2061064

5 September 2014 Triplet harvesting plastic scintillators with neutron-gamma pulse shape discrimination

Edgar V. van Loef, Patrick Feng, Gary Markosyan, Urmila Shirwadkar, Patrick Doty, Kanai Shah

Proceedings Volume 9213, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XVI; 921306 (2014) https://doi.org/10.1117/12.2061064
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

In this paper we report on plastic scintillators that contain organometallic iridium compounds as triplet harvesting complexes for neutron-gamma pulse shape discrimination (PSD). Our results show that these plastic scintillators have a relatively high light output (higher than BGO) and exhibit very good neutron-gamma PSD with a Figure-of-Merit of ≥ 2.0 at 2.5 MeVee cut-off energy. Under X-ray excitation, the radioluminescence spectrum exhibits a broad band between 400 and 650 nm peaking at 470 nm which is well-matched to bialkali photomultiplier tubes and UV-enhanced photodiodes. The scintillation decay due to Ir³⁺ luminescence is of the order of 1 us.

Citation Download Citation

Edgar V. van Loef, Patrick Feng, Gary Markosyan, Urmila Shirwadkar, Patrick Doty, and Kanai Shah "Triplet harvesting plastic scintillators with neutron-gamma pulse shape discrimination", Proc. SPIE 9213, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XVI, 921306 (5 September 2014); https://doi.org/10.1117/12.2061064

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