Article
Engineering, Biomedical
Jeppe Brage Christensen, Michele Togno, Konrad Pawel Nesteruk, Serena Psoroulas, David Meer, Damien Charles Weber, Tony Lomax, Eduardo G. Yukihara, Sairos Safai
Summary: The Al2O3:C optically stimulated luminescence detectors were found to be dose rate independent and applicable for radiobiological experiments in proton beams at ultra-high dose rates, with minimal deviation from nominal doses. Two setups for ultra-high dose rate experiments were presented, as well as a new method to extract beam spot size of narrow pencil beams.
PHYSICS IN MEDICINE AND BIOLOGY
(2021)
Article
Chemistry, Physical
L. Pan, S. Sholom, S. W. S. McKeever, L. G. Jacobsohn
Summary: This study investigated magnesium aluminum spinels with different Mg:Al ratios for optically stimulated luminescence dosimeters, finding that stoichiometric spinel showed superior OSL dose response, stability, and sensitivity compared to other ratios.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nuclear Science & Technology
Yuho Hirata, Tatsuhiko Sato, Kenichi Watanabe, Tatsuhiko Ogawa, Alessio Parisi, Akira Uritani
Summary: The reliability of dose assessment using radiation detectors is crucial in radiotherapy, radiation protection, and high-energy physics. However, detectors exposed to high linear energy transfer (LET) radiations often exhibit a decrease in efficiency known as the quenching effect. This study proposes a computational method to estimate the relative efficiency of luminescence detectors based on analysis of specific energy distributions simulated using the particle and heavy ion transport code system (PHITS). The model was successfully applied to estimate the efficiency of BaFBr:Eu detectors and the experimental data showed good agreement with the calculations.
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Camilla L. Nielsen, Rosana M. Turtos, Martin Bondesgaard, Jacob S. Nyemann, Mads L. Jensen, Bo B. Iversen, Ludvig P. Muren, Brian Julsgaard, Peter Balling
Summary: This study demonstrates that Cu-doped LiF nanocubes are excellent candidates for 3D optically stimulated luminescence (OSL) dosimetry due to their high sensitivity, dose linearity, and stability under ambient conditions. The embedded nanocubes in silicone sheets show promising transparency and light yield, offering potential for future 3D OSL-based dosimetry.
Article
Engineering, Electrical & Electronic
J. J. Schuyt, G. V. M. Williams
Summary: In this study, optically stimulated luminescence was used for two-dimensional X-ray dose imaging of a NaMgF3:Mn/epoxy composite. The material showed a linear response to radiation dose and high sensitivity to low doses. Images with high resolution could be obtained within seconds using a CCD camera readout system, and the system was capable of monitoring sub-millimetre dose variations.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Review
Engineering, Biomedical
Patricia B. G. Gasparian, Anna Luiza Metidieri Cruz Malthez, Leticia L. Campos
Summary: This review provides an overview of the use of optically stimulated luminescence detectors (OSLDs) for dose mapping in various applications. It examines the main characteristics and significant findings of research studies, as well as potential future developments in dose mapping using OSLD films.
PHYSICS IN MEDICINE AND BIOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
F. O. Ogundare, M. L. Chithambo, B. O. Akintunde
Summary: Continuous wave optically stimulated luminescence (CW-OSL) and linear modulation OSL (LM-OSL) characteristics were investigated in three different types of cowrie shells. Results showed that both CW-OSL and LM-OSL curves of the shells consist of fast, medium, and slow components, with independent peak values for all samples and linear increase with dose. The shells exhibit low coefficient of variation, making them potential materials for retrospective dosimetry.
APPLIED RADIATION AND ISOTOPES
(2021)
Article
Optics
J. M. Kalita, S. Kaya-Keles, G. O. Cakal, N. Meric, G. S. Polymeris
Summary: The study found that ulexite is a boron mineral with potential for radiation dosimetry and dating, characterized by four glow peaks and different activation energies. These findings suggest that ulexite could serve as a promising luminescent material.
JOURNAL OF LUMINESCENCE
(2021)
Article
Multidisciplinary Sciences
Jeppe Brage Christensen, Michele Togno, Lily Bossin, Oskari Ville Pakari, Sairos Safai, Eduardo Gardenali Yukihara
Summary: The objective of this study was to improve the precision of LET measurements in proton beams using Al2O3:C OSLDs and correct for LET-dependent ionization quenching. The study found that automated corrections improved LET estimates and ionization quenching-corrections in proton dosimetry, and demonstrated for the first time how LET can be estimated for different doses.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Mads L. Jensen, Rosana M. Turtos, Brian Julsgaard, Volkmar Schulz, Peter Balling, Stefan Gundacker
Summary: This study presents a novel method for determining the branching ratio of thermalized carriers to optically stimulated luminescence (OSL) in scintillators. The method was demonstrated using a cerium-doped lutetium oxyorthosilicate (LYSO:Ce) crystal, and the observed signal was confirmed to originate from OSL photons. The branching ratio of thermalized carriers to OSL traps in LYSO:Ce was found to be (1.0 +/- 0.2)% upon excitation with 511 keV gamma photons.
JOURNAL OF LUMINESCENCE
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
F. Dusi, F. Guida, E. N. Villegas Garcia, M. A. Rossato, A. Germani, S. Sapignoli, A. Scaggion, A. Scott, A. Zorz, M. Paiusco
Summary: The aim of this study was to investigate the fetal dose related to the use of Virtual Tangential-fields Arc Therapy (ViTAT) and compare it with the standard 3D conformal radiation therapy technique (3DCRT). Results showed that ViTAT can be used as an alternative to 3DCRT while maintaining similar fetal dose levels, especially when 6XFFF beams are used.
PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS
(2022)
Article
Optics
Jacob S. Nyemann, Peter Balling, Eduardo G. Yukihara
Summary: The study investigates the OSL recombination processes in the thermoluminescent material LiF:Mg,Cu,P (MCP) and identifies two categories of recombination luminescence. The research shows that all recombination channels share similarities in response to sample preheating, indicating an association with the same trapping centers.
JOURNAL OF LUMINESCENCE
(2021)
Article
Optics
J. M. Kalita, S. Kaya-Keles, G. O. Cakal, N. Meric, G. S. Polymeris
Summary: The colemanite-rich borate mineral from Turkey exhibits monoclinic crystal structure with high contents of B and CaO. It shows explosive release of water below 200 degrees C and produces thermoluminescence and optically stimulated luminescence following beta irradiation. The sample has multiple glow peaks at specific temperatures and the OSL decay curve indicates three components with different dose responses.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
L. F. Souza, C. R. E. Silva, D. N. Souza, M. S. Nogueira
Summary: This study investigates the potential use of luminescent materials in diagnostic radiology tandem systems. Results show that both detector pairs can be effectively used for energies below 50 keV, with MBO/Al2O3:C demonstrating higher efficacy compared to 80-20MBO/Al2O3:C. The highest uncertainty is observed for MBO/Al2O3:C.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Optics
Camilla Lonborg Nielsen, Rosana Martinez Turtos, Mads Lykke Jensen, Brian Julsgaard, Peter Balling
Summary: In this study, phase-pure LiBaF3 nanoparticles were successfully synthesized, exhibiting radioluminescence with three peaks corresponding to different luminescent processes. Optically- and thermally stimulated luminescence showed a common luminescent pathway. The OSL signal was linearly related to dose up to-1 kGy. The TL glow peak at around 120 degrees C was depleted by optical stimulation, and the OSL signal disappeared following a TL readout. The thermal trap depth was found to be-1 eV. The high OSL light yield and reasonable fading make the nanoparticles an excellent candidate for OSL dosimetry.
JOURNAL OF LUMINESCENCE
(2023)
Article
Geography, Physical
Yajun Li, Xingmin Meng, Thomas Stevens, Simon Armitage, Shiqiang Bian, Guan Chen, Jianhua He
Summary: Understanding fan incision/aggradation mechanisms is crucial for fan evolution and hazardous processes. Study on CJB valley revealed mudflows and debris flows as main fan-forming processes, with aggradation period between 10-4.9 cal kyr BP and incision after 4.9 cal kyr BP.
Article
Multidisciplinary Sciences
Maria Martinon-Torres, Francesco d'Errico, Elena Santos, Ana Alvaro Gallo, Noel Amano, William Archer, Simon J. Armitage, Juan Luis Arsuaga, Jose Maria Bermudez de Castro, James Blinkhorn, Alison Crowther, Katerina Douka, Stephan Dubernet, Patrick Faulkner, Pilar Fernandez-Colon, Nikos Kourampas, Jorge Gonzalez Garcia, David Larreina, Francois-Xavier Le Bourdonnec, George MacLeod, Laura Martin-Frances, Diyendo Massilani, Julio Mercader, Jennifer M. Miller, Emmanuel Ndiema, Belen Notario, Africa Pitarch Marti, Mary E. Prendergast, Alain Queffelec, Solange Rigaud, Patrick Roberts, Mohammad Javad Shoaee, Ceri Shipton, Ian Simpson, Nicole Boivin, Michael D. Petraglia
Summary: This study describes the partial skeleton of a roughly 2.5- to 3.0-year-old child dating to 78,000 years ago found in the Middle Stone Age (MSA) layers of Panga ya Saidi (PYS) in Kenya. The discovery sheds light on how MSA populations interacted with the dead, providing insight into early human burial practices in Africa.
Article
Multidisciplinary Sciences
Miroslaw Masojc, Ju Yong Kim, Joanna Krupa-Kurzynowska, Young Kwan Sohn, Maciej Ehlert, Grzegorz Michalec, Marzena Cendrowska, Eric Andrieux, Simon J. Armitage, Marcin Szmit, Ewa Dreczko, Jin Cheul Kim, Ji Sung Kim, Gwang-Soo Lee, Piotr Moska, Modather Abdalla Jadain
Summary: The EDAR 7 site in the Atbara region of Sudan provides a unique opportunity to study and date Acheulean stone tools, shedding light on the behavior of ancient humans in the Sahara region. The site has delivered a complete Acheulean knapping chaine operatoire and provides new information about the Saharan Acheulean, showing evidence of Homo erectus occupation during Middle Pleistocene humid periods.
Article
Multidisciplinary Sciences
Eleanor M. L. Scerri, Marine Frouin, Paul S. Breeze, Simon J. Armitage, Ian Candy, Huw S. Groucutt, Nick Drake, Ash Parton, Tom S. White, Abdullah M. Alsharekh, Michael D. Petraglia
Summary: The Arabian Peninsula has been a critical landmass with limited knowledge of Acheulean culture, but the recent discovery of the An Nasim site in the Nefud Desert of northern Saudi Arabia suggests it may be the oldest documented Acheulean site in the region, showcasing a diverse stone tool assemblage.
SCIENTIFIC REPORTS
(2021)
Article
Geosciences, Multidisciplinary
Yuqiu Zhao, Djordje Grujic, Santanu Baruah, Dawchu Drukpa, Joanne Elkadi, Gyorgy Hetenyi, Georgina E. King, Zoe K. Mildon, Nityam Nepal, Caroline Welte
Summary: The 1714 Bhutan earthquake was a significant event with surface rupture extending further than previously thought. Studies should not only focus on surface-rupturing events but also consider other factors to avoid underestimating the seismic slip along the Himalayan megathrust.
FRONTIERS IN EARTH SCIENCE
(2021)
Correction
Multidisciplinary Sciences
Huw S. Groucutt, Tom S. White, Eleanor M. L. Scerri, Eric Andrieux, Richard Clark-Wilson, Paul S. Breeze, Simon J. Armitage, Mathew Stewart, Nick Drake, Julien Louys, Gilbert J. Price, Mathieu Duval, Ash Parton, Ian Candy, W. Christopher Carleton, Ceri Shipton, Richard P. Jennings, Muhammad Zahir, James Blinkhorn, Simon Blockley, Abdulaziz Al-Omari, Abdullah M. Alsharekh, Michael D. Petraglia
Article
Geography, Physical
C. Bouscary, G. E. King
Summary: Luminescence thermochronometry is used to resolve thermal histories over sub-Quaternary timescales by applying a MET-pIR-IRSL protocol to feldspar minerals. The thermal histories are dependent on the stability of the MET signal and vary with experimental conditions, specifically the isothermal holding temperatures. Through analysis of samples with known and unknown thermal histories, the study validates the protocol and suggests using four isothermal holding temperatures between 190 and 250 degrees C for appropriate thermal kinetic parameter derivation.
QUATERNARY GEOCHRONOLOGY
(2022)
Article
Geography, Physical
Abdallah S. Zaki, Georgina E. King, Negar Haghipour, Robert Giegengack, Stephen E. Watkins, Sanjeev Gupta, Mathieu Schuster, Hossam Khairy, Salah Ahmed, Mostafa El-Wakil, Saleh A. Eltayeb, Frederic Herman, Sebastien Castelltort
Summary: During the Quaternary period, there were significant human migrations from the Nile Valley to the west and northwestward of the Sahara during the African Humid Period (AHP), characterized by increased monsoons. Sediments preserved in fossil rivers clustered within the AHP, showing increased fluvial activity. These intense hydrologic conditions lasted or occurred more frequently during the AHP, potentially rendering the area inhospitable for human settlements.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Ecology
Alex Mackay, Simon J. Armitage, Elizabeth M. Niespolo, Warren D. Sharp, Mareike C. Stahlschmidt, Alexander F. Blackwood, Kelsey C. Boyd, Brian M. Chase, Susan E. Lagle, Chester F. Kaplan, Marika A. Low, Naomi L. Martisius, Patricia J. McNeill, Ian Moffat, Corey A. O'Driscoll, Rachel Rudd, Jayson Orton, Teresa E. Steele
Summary: This study found a series of novel human behavioral adaptations dating approximately from 92-80 thousand years ago at an archaeological site in southern Africa's arid region. These adaptations were not observed in contemporaneous sites in more humid regions. It suggests that early human groups' innovation was sensitive to ecological variations.
NATURE ECOLOGY & EVOLUTION
(2022)
Article
Geochemistry & Geophysics
Manabu Ogata, Georgina E. King, Frederic Herman, Shigeru Sueoka
Summary: This study applied multi-OSL-thermometry to K-feldspar obtained from deep borehole core samples and found that it can be used to reconstruct paleothermal conditions, although the inverted temperatures for different signals showed inconsistency.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geography, Physical
Alicia Medialdea, Dominik Brill, Georgina E. King, Anja Zander, Maria Rosa Lopez-Ramirez, Melanie Bartz, Helmut Brueckner
Summary: Luminescence dating is a key tool in Quaternary studies. Conventional OSL dating can be compromised when the luminescence decay is not dominated by the fast component. In this study, VSL has been used to overcome this problem and successfully dated quartz samples from the Atacama Desert, confirming the suitability of VSL for dating sedimentary quartz with unreliable blue-OSL response.
QUATERNARY GEOCHRONOLOGY
(2022)
Article
Geology
Georgina E. King, Floriane Ahadi, Shigeru Sueoka, Frederic Herman, Leif Anderson, Cecile Gautheron, Sumiko Tsukamoto, Nadja Stalder, Rabiul Biswas, Matthew Fox, Guillaume Delpech, Stephane Schwartz, Takahiro Tagami
Summary: The exhumation of bedrock is controlled by the interplay of tectonics, surface processes, and climate. This study shows that high exhumation rates are not only found in highly active tectonic convergence zones, but also in the Hida Mountain Range, Japanese Alps. The study also reveals that exhumation rates can change significantly within glacial-interglacial cycles, possibly due to a combination of factors.
Article
Geography, Physical
Joanne Elkadi, Benjamin Lehmann, Georgina E. King, Olivia Steinemann, Susan Ivy-Ochs, Marcus Christl, Frederic Herman
Summary: The article studies the erosion processes in the European Alps after the retreat of glaciers through various methods, revealing a negative correlation between erosion rate and elevation, suggesting that frost crack weathering may not be the main form of erosion. Comparing global subglacial and periglacial erosion rates, it is found that subglacial erosion remains higher and continues to have a stronger influence on shaping landscapes.
EARTH SURFACE DYNAMICS
(2022)
Article
Archaeology
Maciej Ehlert, Ju Yong Kim, Young Kwan Sohn, Marzena Cendrowska, Joanna Krupa-Kurzynowska, Eric Andrieux, Simon J. Armitage, Grzegorz Michalec, Ewa Dreczko, Hassan Mustafa Alkhidir, Marcin Szmit, Miroslaw Masojc
Summary: This paper presents the results of technological and functional analyses of Middle Stone Age lithic artefacts from the EDAR 135 site in the Sudanese Eastern Desert. The assemblage, dating back to Marine Isotope Stage 5e-5d, shows distinct characteristics compared to other MSA inventories in Northeast Africa. The findings confirm the presence of Middle and Late Pleistocene hominins along a possible migration route from Africa to Eurasia.
AZANIA-ARCHAEOLOGICAL RESEARCH IN AFRICA
(2022)
Article
Geography, Physical
Dominik Brill, Simon Matthias May, Nadia Mhammdi, Georgina King, Benjamin Lehmann, Christoph Burow, Dennis Wolf, Anja Zander, Helmut Brueckner
Summary: Wave-transported boulders provide important records of storm and tsunami impact over geological timescales. While OSL-RSED may not provide reliable absolute exposure ages for coastal boulders in this study, it shows potential for boulder deposits composed of rocks with larger amounts of quartz or feldspar and less susceptibility to erosion.
EARTH SURFACE DYNAMICS
(2021)
Article
Geography, Physical
Monika Devi, Naveen Chauhan, Ashok K. Singhvi
Summary: Devi et al. (2022) suggested that post-violet infrared stimulated luminescence (pVIRSL) of K-feldspars has a near zero athermal fading rate. This study investigates the mechanism and suitability of the pVIRSL signal for dating applications. The results show that pVIRSL is a recuperated signal resulting from the eviction and recapture of charges in deep traps by violet stimulation and subsequent infrared stimulation. The pVIR-SAR protocol worked well for dating seven K-feldspar samples from various depositional environments.
QUATERNARY GEOCHRONOLOGY
(2024)
Article
Geography, Physical
Chloe Baldreki, Andrew Burnham, Martina Conti, Lucy Wheeler, Michael J. Simms, Lawrence Barham, Tom S. White, Kirsty Penkman
Summary: Aragonitic calcium carbonate mollusc shells with complex shell microstructures can be used for amino acid geochronologies in Africa. Different microstructural shell layers may have different protein compositions, requiring sampling strategies. The 3AL shell portion showed closer adherence to closed-system behavior and demonstrated the potential of fossil achatinids for building relative amino acid geochronologies across Africa.
QUATERNARY GEOCHRONOLOGY
(2024)
Article
Geography, Physical
Patrick Chiroiu, Alexandru L. Onaca, Adrien Favillier, Mircea Voiculescu, Christophe Corona, Petru Urdea, Markus Stoffel
Summary: Snow avalanches present a constant threat to mountainous regions worldwide, and understanding past avalanche events is crucial for managing and mitigating avalanche hazards and risks. In this study, dendrogeomorphic techniques were used to analyze 17 avalanche paths in a small region of the Fagaras Mountains. The analysis reconstructed 174 snow avalanche years across all paths and revealed widespread avalanche occurrence in the study area. The study emphasizes the importance of investigating multiple avalanche paths in a small, homogeneous area to gain a better understanding of snow avalanche activity at both path-scale and mountain range-scale.
QUATERNARY GEOCHRONOLOGY
(2024)