Positron & Positronium Physics
 
The UCL Positron Group
      Positrons (the antiparticles of electrons) and positronium (the bound state of an electron and a positron) are currently employed in the exploration of fundamental effects ranging from condensed matter physics to astrophysics as well as in the diagnostics of living biological systems and of the electronic and structural properties of industrially important materials. Our main research interests are in atomic physics problems where beams of positrons and positronium with speeds comparable to those of atomic electrons are contributing to the unravelling of general collision phenomena as well as illuminating specific interactions and processes such as exchange and annihilation.
      Current hot topics of research worldwide include positron-induced ion production (comprising ionization with and without Ps formation, annihilation, etc), positron impact excitation (vibrational and electronic) and positronium scattering. Measurements of differential ionization and positronium collisions are in their infancy. UCL is a pioneer in this type of research.
News
Studentships, Assistantships, Fellowships: We welcome applications for studentships, assistantships and fellowships at any time. If interested, please contact Gaetana Laricchia
.

  • Nov. 2018: Fully funded PhD Studentship available in Positron and Positronium Scattering


  • Oct. 2018: "Cloud, marriages and clouds" www.nature.com/articles/s41598-018-33425-8
  • Oct. 2018: Laricchia et al publish "A statistical description of scattering at the quantum level" https://www.nature.com/articles/s41598-018-33425-8.pdf
  • July 2018: Congratulations to Joanna Lis for being awarded the prize for the best performance in 4th year Physics, and the prize for "the best 4th year project achieving balance between theoretical and practical physics"
  • 2018: Warmest congratulations to Laszlo Sarkadi on being awarded the Officer's Cross of the Order of Merit of the Republic of Hungary
  • Sep. 2017: Congratulations to Rina Kadokura for winning a prize for her talk at the recent AMIG conference in Glasgow!
  • Apr. 2017: Congratulations to Andrea Loreti on passing his PhD viva!
  • Nov. 2016: Congratulations to Sam Fayer on passing his PhD viva!
  • Apr. 2016: Congratulations to Michael Shipman on passing his PhD viva!
  • March 2016: It is with much sadness that we share the news that Professor Ceiri Griffith, who with Dr George Heyland established experimental positron physics at UCL in the early 1970s , passed away on the 26th March 2016.
  • 2016: Warmest congratulations to Akos Kover on being awarded the Officer's Cross of the Order of Merit of the Republic of Hungary
  • Nov. 2015: First direct sightings of low-energy positronium collisions
  • July 2015: Revealed: the behaviour of positronium in particle billiards
  • 2015: Gaetana Laricchia is elected Honorary Member of the Roland Eotvos Physical Society of Hungary
  • 2014: Congratulations to Andrea Loreti on being awarded a student prize at SLOPOS14!
  • 2015: Congratulations to Sam Fayer on winning a second prize at the first UCL Physics Hackathon
  • Institute of Physics Reprint Service:
  • 2013: You may download a copy of the IOP brochure "Antimatter - a review of its role in the universe and its applications" from this page.
  • 2013: Very well done to Sam Fayer on winning a runner-up poster-prize at QuAMP 2013
  • 2012: RIVISTA DEL NUOVO CIMENTO Electronic Reprint Service:
  • You may download a ***free*** copy of our paper "Positronium Collision Physics" from this page.
  • 2012: Warmest congratulations to Akos Kover on being awarded the Physics Prize of the Hungarian Academy of Sciences
  • Jun. 2011: Congratulations to Adam Williams on passing his PhD examination!
  • 2010: First observation of resonant scattering of Positronium...
  • ...in Physics World
  • ...in New Scientist
  • SCIENCE Electronic Reprint Service:
  • You may download a ***free*** copy of our paper "Electron-like Scattering of Positronium" from this page.
  • 2010: Brawley et al. publish "Electron-Like Scattering of Positronium"...
  • Oct 2010: Congratulations to David Cooke on passing his PhD examination!
  • 2010: Gaetana Laricchia is awarded the Thomson Medal and Prize by the Institute of Physics
  • 2010: Cooke et al. publish "Simultaneous ionization and excitation...
  • 2010: Institute of Physics "Atomic and Molecular Interactions Group" broucher on Antimatter published
  • Nov 2009: Congratulations to Simon Brawley on passing his PhD viva!
  • 2009: Gaetana Laricchia is awarded the Occhialini Medal and Prize jointly by the Institute of Physics and the Societa' Italiana di Fisica (IOP site)
  • 2009: Gaetana Laricchia is awarded the Occhialini Medal and Prize 2009 jointly by the Institute of Physics and the Societa' Italiana di Fisica (SIF site)
  • Feb. 2003: Fragmentation of positronium in the American Physical Society "Physics News 2002"
  • Oct. 2002: Armitage et al publish "Fragmentation of Positronium in Collision with He Atoms" https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.89.173402