Spectroscopic, photometric, and radiation shielding studies of europium-activated red-emitting magnesium borosilicate glasses
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, cilt.363, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 363
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.saa.2026.128335
- Dergi Adı: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, Chemical Abstracts Core, Chimica, Compendex, EMBASE, INSPEC, MEDLINE, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Correlated color temperatures, Eu3+ − doped borosilicate glasses, FTIR-absorption, Photoluminescence-laser parameters, Radiation shielding
- Atatürk Üniversitesi Adresli: Evet
Özet
This work explores the spectroscopic, photometric, laser-related, and radiation-shielding properties of magnesium borosilicate glasses, BSMCPN: B₂O₃–SiO₂–MgO–CS₂CO₃–PbCl₂–NaCl, activated with varying amounts of europium (Eu3+). Unlike many previously reported Eu3+-doped glass systems that mainly focus on luminescence behavior, the present study provides a combined evaluation of red-emission performance, laser parameters, photon attenuation, buildup factors, and effective removal cross-section within the same glass matrix. The functional groups of the glasses were studied by FTIR spectroscopy, while optical absorption was analyzed using Tauc and Urbach plots to determine the energy gap values, which decreased from 3.29 to 3.14 eV. The intense excitation transition at 465 nm, assigned to 7F0 → 5D2 and referred to as the zero phonon line (ZPL), was used to estimate the phonon energy of the host glass as 1248 cm−1. With increasing Eu3+ content, the Judd˗Ofelt parameters Ω2,4 and lifetimes of 2.11˗2.42 ms were obtained, while intrinsic emission quantum yield (ΦEuEu) increased from 66% to 76% with decreasing non-radiative decay rates from 160 to 99 s˗1. Considering the importance of the 5D0 → 7F2 red emission, the BSMCPNEu15 glass was evaluated from a laser perspective, showing an emission cross-section of 11.81 × 10−20 cm2, optical gain of 27.75 × 10−25 cm2s, and gain bandwidth of 148.68 × 10−29 cm3. The photometric parameters of the red-emitting glasses were also assessed, giving chromaticity coordinates around (0.6104, 0.3411), color purity values of 70–94%, and correlated color temperatures below 1250 K. The mass attenuation coefficients of the prepared glass system were systematically evaluated over a broad photon energy range from 15 keV to 15 MeV, and the variation of photon buildup factors with penetration depth was also analyzed at 0.5 MeV. Among the studied compositions, BSMCPNEu20 exhibited superior radiation-shielding performance, with an effective removal cross-section (ΣR) value of 0.09769 cm˗1. These combined optical, photometric, laser, and shielding results indicate that BSMCPNEu glasses can be considered multifunctional candidates for red-emitting photonic devices and radiation-shielding applications.