Using LEDs to stimulate the recovery of radiation damage to plastic scintillators

Wetzel, J.; Tiras, EMRAH; Bilki, B.; Onel, Y.; Winn, D.

doi:10.1016/j.nimb.2017.01.081

Using LEDs to stimulate the recovery of radiation damage to plastic scintillators

Wetzel J., Tiras E., Bilki B., Onel Y., Winn D.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, cilt.395, ss.13-16, 2017 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 395
Basım Tarihi: 2017
Doi Numarası: 10.1016/j.nimb.2017.01.081
Dergi Adı: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.13-16
Anahtar Kelimeler: Radiation-hard detector materials, LED stimulated radiation damage recovery, Plastic scintillators, Light yield, PHOTOMULTIPLIER
Erciyes Üniversitesi Adresli: Hayır

Özet

In this study, we consider using LEDs to stimulate the recovery of scintillators damaged from radiation in high radiation environments. We irradiated scintillating tiles of polyethylene naphthalate (PEN), Eljen brand EJ-260 (EJN), an overdoped EJ-260 (EJ2P), and a lab-produced elastomer scintillator (ES) composed of p-terphenyl (ptp) in epoxy. Two different high-dose irradiations took place, with PEN dosed to 100 kGy, and the others to 78 kGy. We found that the 'blue' scintillators (PEN and ES) recovered faster and maximally higher with LEDs than without. Conversely exposing the 'green' scintillators (EJ-260) to LED light had a nearly negligible effect on the recovery. We hypothesize that the 'green' scintillators require wavelengths that match their absorption and emission spectra for LED stimulated recovery. (C) 2017 Elsevier B.V. All rights reserved.