Search for the GeO and SnO molecules in space

(supervisor: Maire Gorman)

Nature of project: data analysis, software

Available to full-time physicists or joint students.

Project description and methodology

This project is based on molecular spectroscopy and would form part of the ExoMol project.

The aim of this project is to generate ground state line lists (list for GeO and SnO. This will be done by gathering and formatting experimental data for these molecules and fitting to an analytical function (Extended Morse Oscillator). The software packages used for the analysis of the experimental data are PGOPHER and MARVEL. Note this project is software/data analysis in nature-yes you will be using published experimental data but not actually in a laboratory taking measurements.

GeO is believed to exist in Jupiter, Uranus and in various astrophysical settings.

A successful project will develop beyond the above in one/some of the following directions:
Generation of unrefined ground state line list for excited states.

Analysis of spectra.

Analysis of energy level decay times for possible laser cooling applications.

When considering where to take your project, please bear in mind the time available. It is preferable to do fewer things well than to try many and not get conclusive results on any of them. However, sometimes it is useful to have a couple of strands of investigation in parallel to work on in case delays occur.

Additional scope or challenge if taken as a Year-4 project: Quantum Chemistry calculations using GAUSSIAN for both ground and excited states.

Initial literature for students:

  1. http://exomol.com/
  2. gaussian.com
  3. http://pgopher.chm.bris.ac.uk/
  4. http://kkrk.chem.elte.hu/marvelonline/index.php

Novelty, degree of difficulty and amount of assistance required

The ExoMol process of producing a ground state line list for diatomics is tried and tested.

Project milestones and deliverables (including timescale)

milestoneto be completed by
Summary of relevant experimental dataChristmas
MARVEL analysis for both molecules.end of February
Comparison of energy levels generated.mid-March
Fitting of experimental data. Easter