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Line identifications for heavy elements of importance in kilonova modelling

School of Mathematics and Physics | PHD
Funding
Funded
Reference Number
2025/033/PHY
Application Deadline
7 February 2025
Start Date
1 October 2025

Overview

In recent years the focus of attention regarding heavy element production has shifted from mainly supernovae to include neutron star mergers. Such mergers are detected by gravitational wave detectors and the optical counterparts contain evidence of heavy elements such as Au and Pt. However, there is a dearth of experimental data on emission lines from low ionisation states of such elements and detailed calculations need to be tested against measurements.

This project centres of the observation of such emission lines in the laboratory. The wavelengths of these lines may then be used as input data to models simulating the optical emissions from neutron star mergers. We will be interested in the regime from about 0.5-2.5 microns, so from optical into the near-IR.

Based in QUB, the project will make use of a class 4 pulsed laser to irradiate a solid target of the desired
element, Au, Pt or other metal. The laser is focussed, under vacuum onto the target, heating it to temperatures of well above 104 K and causing the production of an expanding plasma plume in the vacuum. This contains electrons and ions of the target element. characteristic emission lines which can be detected using a grating spectrometer coupled to a fast-gated intensified CCD camera or IR InGaAS array detector. We will use calibrated lamps to calibrate the spectrometer and identify emission lines not yet classified in data bases such as the NIST database.

Skills gained by student
The student will gain skills in optical and infra-red spectroscopy, laser-plasma generation, operation of class 4 pulsed lasers and vacuum systems. Skills in experimental design and data analysis will also be developed.

Useful references
M. McCann et al MNRAS 509, 4723–4735 (2022)
S.J. Bromley et al The Astrophysical Journal Supplement Series, 250:19 (2020)

Supervisor(s): David Riley, F Keenan
Email contact: d.riley@qub.ac.uk
Type of Project: EXPERIMENTAL
Helpful existing knowledge: General laboratory skills. Will use CCD and IR detectors and class 4 pulsed
laser, vacuum technology.
Funding status: 3-year SFTC funded £600K grant with equipment, travel, consumables and PDRA support.

Funding Information

Successful studentships in the Centre for Light Matter Interaction will be allocated on a competitive basis and are subject to confirmation of legal requirements from funding agencies.

Project Summary
Supervisor

Professor David Riley

More Information

d.riley@qub.ac.uk

Research Profile


Mode of Study

Full-time: 3 years


Funding Body
TBC
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