Tungsten gallium-phosphate glasses as promising intrinsic scintillators

Author(s)

Lodi, Thiago A. ; Galleani, Gustavo ; Merizio, Leonnam G. ; Jacobsohn, Luiz G. ; Mastelaro, Valmor R. ; de Camargo, Andrea S.

• Document type: Journal article
• Source: Journal of Non-Crystalline Solids; v. 603, p. 7-pg., 2022-12-22.

Abstract

Tungsten gallium-phosphate glasses with composition NaPO3-20Ga(2)O(3)-xNa(2)WO(4) (x = 0, 1, 3, 5 and 10% mol) were synthesized by the melt-quenching technique with high chemical stability and excellent optical properties, and evaluated as potential intrinsic glass scintillators. Fourier-transform infrared measurements showed a decrease in the amount of OH- groups for increasing Na2WO4 contents, while X-ray photoelectron spectroscopy revealed the presence of sole W6+ species. Optical transmission measurements showed a high level of transmittance (similar to 90%) over a broad spectral range (400 to 2500 nm). Luminescence was found to correspond to a broad emission characteristic of the WO42- complex that can be excited by ultraviolet and X-rays with average lifetimes ranging from 32 to 20 mu s. At cryogenic temperatures, the NaPGaW glasses showed a significant increase in the luminescence emission. (AU)

• FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
• Grantee: Edgar Dutra Zanotto
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 18/03931-9 - Preparation of fluoride-phosphate glass and glass-ceramics doped with rare-earth ions for potential use as radiation detectors
• Grantee: Gustavo Galleani
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 19/21770-5 - Luminescent materials incorporated to glasses: new composites for application in safety lighting and radiation detection
• Grantee: Leonnam Gotardo Merizio
• Support Opportunities: Scholarships in Brazil - Post-Doctoral