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Dr Anita Dawes

Anita Dawes

Profile summary

  • Research Staff
  • Leverhulme Research Fellow
  • Faculty of Science, Technology, Engineering & Mathematics
  • School of Physical Sciences
  • anita.dawes

Professional biography

I am a Leverhulme Early Career Research Fellow in the School of Physical Sciences at the Open University. I did my undergraduate MSci degree in Physics at University College London (1996 - 2000) and my PhD in the Molecular Physics Lab at University College London (2000 - 2003). I then joined the Astrochemistry Group at The Open University as a Postdoctoral Research Associate (2000 - 2006). I then embarked on a career break with the arrival of my first child in 2007 and had a 6-year break becoming a mother to three children (2007 - 2013). In 2013 I returned to research, re-joining the rapidly growing Astrochemistry Group at the Shchool of Physical Science after being successful in obtaining a Daphne Jackson Fellowship (2013-2016), co-sponsored by the Open University and Science and Technology Facilities Council, enabling me to re-train and refresh my skills and regain confidence as a researcher, allowing me to work part-time whilst looking after my young family. Towards the end of the three years, the tailor-made Daphne Jackson re-training programme paid off as I was successful in being awarded a Leverhulme Early Career Fellowship (starting October 2016), continuing my work in laboratory astrochemistry.

Research interests

My research interests are in Laboratory Astrochemistry. I simulate cold space environments such as dense molecular clouds from which stars form, protoplanetary discs around baby stars or icy surfaces of Outer Solar System bodies under conrtolled laboraory conditions to study the chemical and physical properties of cosmic ice analogues. My specific interests are:

  • probing astrochemical ice analogues, grown in situ by vapour deposition, using both infrared and vacuum ultraviolet spectrocopy
  • investigating how the physical and chemical properties of ices grown in the laboratory are affected by molecular composition, thickness, temperature, concentration and mixing/layering and how these relate to real astrophysical environments
  • measuring high resolution vaccuum ultraviolet spectra (115 - 340 nm), using synchrotron radiation at the ASTRID2 Synchrotron Facility, Denmark, to determine photoabsorption cross sections of condensed ices and ice mixtures in order to better understand and quantify photochemical processes
  • investigating the role of large condensed phase molecules such as polycyclic aromatic hydrocarbons (PAHs) as constituents of astrochemical ices in influencing chemical and desorption processes
  • providing high resolution infrared laboratory data for the interpretation of astronomical spectra in star-forming regions
  • investigating the effect of realistric micro-/nano-scale dust grain size, shape and composition on the physical and chemical properties of ices by exploiting the technique of acoustic levitation

You can read a news article on my new Leverhulme project on "The physico-chemical properties and aggregation of interstellar dust and ice" here.

Research Activity

Externally funded projects

The physico-chemical properties and aggregation of interstellar dust and ice

RoleStart dateEnd dateFunding source
Lead01/Sep/201631/May/2020LEVERHULME The Leverhulme Trust
Microscopic icy dust particles in the interstellar medium play a crucial role in molecular synthesis and star and planet formation. Laboratory data is essential for interpretation of astronomical spectra and for building accurate astrochemical models. However most laboratory ices are grown on large (cm-sized) flat substrates, unrepresentative of microscopic 3D fractal-like interstellar grains. Evidence suggests that particle size, structure and composition may profoundly influence the physico-chemical properties of ice. I will exploit novel laboratory techniques, by developing a unique acoustic trap to form and trap microscopic icy dust particles as realistic interstellar icy grain analogues and investigate their physico-chemical properties and aggregation using infrared and ultraviolet spectroscopy and compare to observations. This work has the potential to resolve key Astrochemistry questions that have persisted for decades, whilst bringing together core strands of physics, chemistry and astronomy.

Publications

Using the C-O stretch to unravel the nature of hydrogen bonding in low-temperature solid methanol-water condensates (2016)
Dawes, Anita; Mason, Nigel and Fraser, Helen J.
Physical Chemistry Chemical Physics, 18 (pp. 1245-1257)
Photon- and electron-stimulated desorption from laboratory models of interstellar ice grains (2010-07)
Thrower, J. D.; Abdulgalil, A. G. M.; Collings, M. P.; McCoustra, M. R. S.; Burke, D. J.; Brown, W. A.; Dawes, A.; Holtom, P. J.; Kendall, P.; Mason, N. J.; Jamme, F.; Fraser, H. J. and Rutten, F. J. M.
Journal of Vacuum Science and Technology A, 28(4) (pp. 799-806)
Desorption of hot molecules from photon irradiated interstellar ices (2008-02)
Thrower, J. D.; Burke, D. J.; Collings, M. P.; Dawes, A.; Holtom, P. D.; Jamme, F.; Kendall, P.; Brown, W. A.; Clark, I. P.; Fraser, H. J.; McCoustra, M. R. S.; Mason, N. J. and Parker, A. W.
Astrophysical Journal, 673(2) (pp. 1233-1239)
The spectroscopy and chemical dynamics of microparticles explored using an ultrasonic trap (2008)
Mason, N. J.; Dawes, A.; Drage, E. A.; Webb, S. M.; McPheat, R. and Hayes, G.
Faraday Discussions, 137 (pp. 367-376)
Surface science investigations of photoprocesses in model interstellar ices (2008)
Thrower, J. D.; Collings, M. P.; McCoustra, M. R. S.; Burke, D. J.; Brown, W. A.; Dawes, A.; Holtom, P. D.; Kendall, P.; Mason, N. J.; Jamme, F.; Fraser, H. J.; Clark, I. P. and Parker, A. W.
Journal of Vacuum Science and Technology A, 26(4) (pp. 919-924)
Morphological study into the temperature dependence of solid ammonia under astrochemical conditions using vacuum ultraviolet and Fourier-transform infrared spectroscopy (2007-06-28)
Dawes, Anita; Mukerji, Robin J.; Davis, Michael P.; Holtom, Philip D.; Webb, Sarah M.; Sivaraman, Bhalamurugan; Hoffmann, Søren V.; Shaw, David A. and Mason, Nigel J.
Journal of Chemical Physics, 126(24) (pp. 244711-1)
The ultraviolet spectrum of condensed methylamine at 25 K (2007-05)
Holtom, P. D.; Dawes, A.; Davis, M. P.; Hoffmann, S. V.; Mukerji, R. J. and Mason, N. J.
Radiation Physics and Chemistry, 76(5) (pp. 745-749)
Low energy 13C+ and 13C2+ ion irradiation of water ice (2007-04-13)
Dawes, Anita; Hunniford, Adam; Mukerji, Robin J.; Holtom, Philip D.; McCullough, Robert W. and Mason, Nigel J.
Physical Chemistry Chemical Physics, 9(22) (pp. 2886-2893)
Low energy 13C+ and 13C2+ ion irradiation of water ice (2007)
Dawes, Anita; Hunniford, Adam; Holtom, Philip; Mukerji, Robin J.; McCullough, Robert W. and Mason, Nigel
Physical Chemistry Chemical Physics, 9 (pp. 1-8)
VUV Spectroscopy of Extraterrestrial Ices (2006-09-22)
Mason, Nigel J.; Dawes, Anita; Holtom, Philip D.; Mukerji, Robin J.; Davis, Michael P.; Sivaraman, Bhala; Kaiser, Ralf I.; Hoffmann, Soren V. and Shaw, David A.
American Institute of Physics Conference Proceedings, 855(1) (pp. 128-139)
VUV photoabsorption spectroscopy of sulfur dioxide ice (2006-01)
Holtom, P.D.; Dawes, A.; Mukerji, R.J.; Davis, M.P.; Webb, S.M.; Hoffman, S.V. and Mason, N.J.
Physical Chemistry Chemical Physics, 8(6) (pp. 714-718)
VUV spectroscopy and photo-processing of astrochemical ices: an experimental study (2006)
Mason, Nigel J.; Dawes, Anita; Holtom, Philip D.; Mukerji, Robin J.; Davis, Michael P.; Sivaraman, Bhalamurugan; Kaiser, Ralf I.; Hoffmann, Soren V. and Shaw, David A.
Faraday Discussions, 133 (pp. 311-329)
VUV spectroscopy and photo-processing of astrochemical ices: an experimental study (2006)
Mason, Nigel J.; Dawes, Anita; Holoton, Philip D.; Mukerji, Robin J.; Davis, Michael P.; Sivaraman, Bhalamurugan; Kaiser, Ralf I.; Hoffmann, Søren V. and Shaw, David A.
Faraday Discussions
Atmospheric chemistry with synchrotron radiation (2005-05-14)
Mason, N.J.; Dawes, A.; Mukerji, R.; Drage, E.A.; Vasekova, E.; Webb, S.M. and Limão-Vieira, P.
Journal of Physics B: Atomic, Molecular and Optical Physics, 38(9) (S893-S911)
Laboratory studies of astrophysical molecules: a new UCL apparatus (2005-01-10)
Dawes, A.; Mason, N.J.; Tegeder, P. and Holtom, P.
In: Whelan, C.T. and Mason, N.J. eds. Electron scattering: from atoms, molecules, nuclei and bulk matter. Physics of atoms and molecules (pp. 329-340)
ISBN : 306487012 | Publisher : Springer
Study of condensed phase molecules and molecular synthesis in astrophysical environments (2003)
Dawes, Anita; Holtom, Philip and Mason, Nigel J.
In: Haldar, Dipak and Pandalai, S.G. eds. Recent Research Developments in Chemical Physics(part II) (pp. 519-532)
ISBN : 8178950952 | Publisher : Transworld Research Network
Spectroscopic study of photon, ion and electron stimulated molecular synthesis in astrophysical ices (2003)
Dawes, Anita
PhD thesis University College London (University of London)

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