| Title: |
Further investigations into the accuracy of infrared radiofluorescence (IR-RF) and its inter-comparison with infrared photoluminescence (IRPL) dating |
| Authors: |
Sontag-González, M; Murari, MK; Jain, M; Frouin, M; Fuchs, M |
| Publisher Information: |
Copernicus Publications |
| Publication Year: |
2026 |
| Collection: |
Oxford University Research Archive (ORA) |
| Description: |
Infrared radiofluorescence (IR-RF) is an alternative dating technique for potassium feldspar grains, offering a higher signal stability and based on a simpler underlying mechanism than more common luminescence dating approaches. However, its accuracy when tested on known-age samples has so far shown inconsistent results. In this study, we present a refined accuracy assessment using samples that have previously produced unreliable IR-RF ages. Our approach incorporates two major methodological advancements developed over the past decade: elevated temperature measurements using the IR-RF70 protocol and sensitivity change correction by vertical sliding. To expand the dose range comparison, we included two additional samples: one expected to be in saturation and another of modern age. Additionally, we evaluated the effect of using a narrower bandpass filter to exclude any signal contributions from potentially contaminating shorter wavelength emissions. Our results following the IR-RF70 protocol with sensitivity corrections show an improvement over the original room-temperature results. For four out of the seven tested known-age samples spanning ca. 100–300 Gy (20–130 ka), we obtained results in keeping with the expected doses. Two additional modern samples, however, yielded slight dose underestimations. Introduction of a multiple-aliquot regenerative dose (MAR) protocol improved the accuracy of two out of three samples with large sensitivity changes. Finally, we also compared the new IR-RF equivalent doses (De) to those obtained with the newer dating method, infrared photoluminescence (IRPL), for the same samples, including previously published values and new measurements. Like IR-RF, IRPL is also expected to be trap-specific. We observe that, with the new improvements, the success rate of IR-RF is comparable to that of IRPL. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.5194/gchron-7-289-2025 |
| Availability: |
https://doi.org/10.5194/gchron-7-289-2025; https://ora.ox.ac.uk/objects/uuid:ae9ed238-d610-49d2-ba38-771241727a86 |
| Rights: |
info:eu-repo/semantics/openAccess ; CC Attribution (CC BY) |
| Accession Number: |
edsbas.A70F320F |
| Database: |
BASE |