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The Australian National University

Dr Joshua Machacek

PhD
ARC DECRA Fellow
ANU College of Science

Areas of expertise

  • Atomic And Molecular Physics 020201

Available student projects

Fragmentation of molecules by positronium

Positronium is a bound state between an electron and a positron. It is hydrogen-like with a binding energy half that of hydrogen. Positronium has been found to scatter like an electron for the same velocity. Electrons can fragment molecules by temporary attaching leading to fragmentation. This project will explore the fragmentation of molecules in positronium scattering with molecules.


Benchmark positron scattering experiments

Using the atomic and molecular physics positron beam at the ANU, the student will undertake measurements of positron scattering from simple targets, providing high accuracy data to test recent theoretical calculations.


Positrons and Dust Grains

Positron emitters are embedded in clouds of dust grains produced by supernova. This project will explore the transport of positrons in dust grains using Monte-Carlo techniques to improve our understanding of positron transport in an astrophysically relevant setting.

Publications

Projects and Grants

Grants information is drawn from ARIES. To add or update Projects or Grants information please contact your College Research Office.

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Updated:  13 December 2017 / Responsible Officer:  Director (Research Services Division) / Page Contact:  Researchers