Ann Wintle

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Ann Wintle
Born1948
Alma mater University of Sussex (BS), University of Oxford (PhD)
Scientific career
Fields Geophysics, Archaeology
Institutions Aberystwyth University

Professor Ann Grace Wintle is a British geophysicist and is the pioneer of luminescence dating, by increasing the precision of existing methods and maximum age of fossil the method is able to reliably date. She also set up the NERC luminescence dating facility in Aberystwyth, Wales. [1]

Contents

Early life and education

Wintle was born in 1948 in Hampshire. [2] She studied physics at the University of Sussex in 1969, however she also had a fondness for archaeology, which she credits her mother and Sir Mortimer Wheeler’s TV and radio programmes. She combined both of these interests in her PhD from the University of Oxford. [1]

Career and research

After completing her studies, she completed a post-doc at Oxford and then spent two years at Simon Fraser University. In 1979, she moved to Cambridge, and in 1987 was a lecturer at Royal Holloway, then left for Aberystwyth. In 2000, she spent time at Uppsala University as a guest professor. [3]

Wintle is an Emeritus Professor at Aberystwyth University in the Department of Geography and Earth Sciences. [3] [2]

Her work focuses on luminescence dating, a field at the intersection of archaeology, geology and physics. She studies and applies techniques to date samples from sedimentary deposits containing minerals such as quartz or feldspars. [4] This process is used in archaeology, to date traces of human activity or fossils, and in geology, to trace changes in climate conditions. [1] [4] [5]

Awards and honours

Wintle is an Honorary Member of the Quaternary Research Association [4] and a Senior Fellow of the McDonald Institute for Archaeological Research in Cambridge University [3] .

In 2008, she won the Institute of Physics Edward Appleton Medal and Prize for her outstanding contribution in the development and application of luminescence properties of minerals as a geological dating tool applicable to the past one million years. [6]

In 2015, she was awarded the Liu Tungsheng Distinguished Career Medal For Distinguished Service To The International Community In Quaternary Science. [7]

In 2018, she received the James Croll Medal from the Quaternary Research Association. [8]

She has received Honorary Doctorates from the University of Uppsala in 2001, [5] the University of Wollongong in 2016 [5] as well as the University of Sussex in 2019. [9] She is recognised for her contributions to the development of the field of luminescence dating, for her collaborative work in establishing luminescence dating research laboratories around the world, and for her mentorship. [5]

Related Research Articles

Thermoluminescence dating

Thermoluminescence dating (TL) is the determination, by means of measuring the accumulated radiation dose, of the time elapsed since material containing crystalline minerals was either heated or exposed to sunlight (sediments). As a crystalline material is heated during measurements, the process of thermoluminescence starts. Thermoluminescence emits a weak light signal that is proportional to the radiation dose absorbed by the material. It is a type of luminescence dating.

Loess A predominantly silt-sized clastic sediment of accumulated wind-blown dust

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Aberystwyth University University in Wales

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The University of Wollongong is an Australian public research university located in the coastal city of Wollongong, New South Wales, approximately 80 kilometres south of Sydney. As of 2017, the university had an enrolment of more than 32,000 students, an alumni base of more than 131,859 and over 2,400 staff members.

In physics, optically stimulated luminescence (OSL) is a method for measuring doses from ionizing radiation. It is used in at least two applications:

Luminescence dating refers to a group of methods of determining how long ago mineral grains were last exposed to sunlight or sufficient heating. It is useful to geologists and archaeologists who want to know when such an event occurred. It uses various methods to stimulate and measure luminescence.

Margaret Mary Murnane is Distinguished Professor of Physics at the University of Colorado at Boulder, having moved there in 1999, with past positions at the University of Michigan and Washington State University. She is currently Director of the STROBE NSF Science and Technology Center, and is among the foremost active researchers in laser science and technology. Her interests and research contributions span topics including atomic, molecular, and optical physics, nanoscience, laser technology, materials and chemical dynamics, plasma physics, and imaging science. Her work has earned her multiple awards including the prestigious MacArthur Fellowship award in 2000, the Frederic Ives Medal/Quinn Prize in 2017, the highest award of The Optical Society, and the 2021 Benjamin Franklin Medal in Physics.

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Optically stimulated luminescence thermochronometry

Optically stimulated luminescence (OSL) thermochronometry is a dating method used to determine the time since quartz and/or feldspar began to store charge as it cools through the effective closure temperature. The closure temperature for quartz and Na-rich K-feldspar is 30-35 °C and 25 °C respectively. When quartz and feldspar are beneath the earth, they are hot. They cool when any geological process e.g. focused erosion causes their exhumation to the earth surface. As they cool, they trap electron charges originating from within the crystal lattice. These charges are accommodated within crystallographic defects or vacancies in their crystal lattices as the mineral cools below the closure temperature.

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References

  1. 1 2 3 "Ann Wintle | TrowelBlazers". trowelblazers.com. Retrieved 28 March 2017.
  2. 1 2 "Ann Wintle". The British Library. Retrieved 14 March 2021.
  3. 1 2 3 "Aberystwyth University - Staff". www.aber.ac.uk. Retrieved 14 March 2021.
  4. 1 2 3 "Ann Wintle - Aberystwyth Research Portal". pure.aber.ac.uk. Retrieved 14 March 2021.
  5. 1 2 3 4 "Ann Wintle - University of Wollongong – UOW". www.uow.edu.au. Retrieved 14 March 2021.
  6. "Edward Appleton Medal and Prize recipients". Edward Appleton Medal and Prize recipients | Institute of Physics. Retrieved 14 March 2021.
  7. "Awards - International Union for Quaternary Research". INQUA. Retrieved 14 March 2021.
  8. "Medal Winners - archaeologists, botanists, civil engineers, geographers, geologists, soil scientists, zoologists,". Quaternary Research Association. Retrieved 14 March 2021.
  9. Bealing, Jacqui. "GRADUATION: Honorary degree for the physicist who sheds light on the past". The University of Sussex. Retrieved 14 March 2021.