ORCID Profile
0000-0002-7366-1091
Current Organisation
UNSW Sydney
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Atomic and Molecular Physics | Atomic, Molecular, Nuclear, Particle and Plasma Physics | Particle Physics | Nuclear Physics | Astronomical and Space Sciences | Cosmology and Extragalactic Astronomy
Publisher: Springer Science and Business Media LLC
Date: 09-12-2016
Publisher: American Physical Society (APS)
Date: 18-12-2018
Publisher: American Physical Society (APS)
Date: 04-12-2018
Publisher: American Chemical Society (ACS)
Date: 24-11-2020
Abstract: Biology demonstrates how a near infinite array of complex systems and structures at many scales can originate from the self-assembly of component parts on the nanoscale. But to fully exploit the benefits of self-assembly for nanotechnology, a crucial challenge remains: How do we rationally encode well-defined global architectures in subunits that are much smaller than their assemblies? Strain accumulation
Publisher: American Physical Society (APS)
Date: 30-11-2020
Publisher: Informa UK Limited
Date: 31-08-2010
Publisher: American Physical Society (APS)
Date: 08-06-2018
Publisher: IOP Publishing
Date: 10-01-2011
Publisher: American Physical Society (APS)
Date: 31-12-2020
Publisher: American Physical Society (APS)
Date: 19-10-2011
Publisher: American Physical Society (APS)
Date: 18-05-2011
Publisher: American Physical Society (APS)
Date: 16-08-2012
Publisher: American Physical Society (APS)
Date: 14-08-2003
Publisher: American Physical Society (APS)
Date: 03-12-2009
Publisher: American Physical Society (APS)
Date: 15-06-2020
Publisher: American Physical Society (APS)
Date: 14-12-2004
Publisher: IOP Publishing
Date: 07-09-2015
Publisher: American Physical Society (APS)
Date: 05-10-2018
Publisher: Springer Berlin Heidelberg
Date: 2014
Publisher: American Physical Society (APS)
Date: 13-04-2004
Publisher: American Physical Society (APS)
Date: 10-04-2017
Publisher: IOP Publishing
Date: 13-10-2008
Publisher: IOP Publishing
Date: 08-02-2012
Publisher: Springer Science and Business Media LLC
Date: 11-2013
Publisher: Springer Science and Business Media LLC
Date: 13-12-2012
Publisher: Springer Science and Business Media LLC
Date: 20-01-2010
Publisher: American Physical Society (APS)
Date: 27-08-2012
Publisher: American Physical Society (APS)
Date: 08-04-2019
Publisher: American Physical Society (APS)
Date: 19-10-2005
Publisher: Oxford University Press (OUP)
Date: 12-2013
Publisher: American Physical Society (APS)
Date: 13-11-2012
Publisher: IOP Publishing
Date: 07-09-2015
Publisher: American Physical Society (APS)
Date: 03-07-2013
Publisher: American Physical Society (APS)
Date: 18-07-2022
Publisher: IOP Publishing
Date: 25-05-2017
Publisher: Elsevier BV
Date: 05-2019
Publisher: MDPI AG
Date: 30-03-2017
Publisher: American Physical Society (APS)
Date: 17-02-2022
Publisher: American Physical Society (APS)
Date: 19-03-2001
Publisher: American Physical Society (APS)
Date: 25-05-2022
Publisher: EDP Sciences
Date: 26-08-2011
Publisher: IOP Publishing
Date: 11-2007
Publisher: World Scientific Pub Co Pte Lt
Date: 10-2014
DOI: 10.1142/S0218271814500898
Abstract: In this paper, we examine the spectrum of a massive scalar particle interacting with the strong gravitational field of a static, spherically symmetric object which is not quite massive enough to be a black hole. As was found in the case of massless particles, there exists a dense spectrum of long lived resonances (meta-stable states), which leads to an energy-averaged cross-section for particle capture which approaches the absorption cross-section for a Schwarzschild black hole. However, the generalization to nonzero mass introduces new phenomena, along with important qualitative changes to the scattering properties. In contrast to the massless case, there exists a spectrum of bound states with almost identical structure to that of the resonances, allowing for the possibility of radiative transitions and particle capture. The resonance lifetimes for elastic processes are parametrically larger than for massless particles, meaning the absorption cross-section approaches the black hole case faster than for massless scalars.
Publisher: American Physical Society (APS)
Date: 13-08-2018
Publisher: American Physical Society (APS)
Date: 10-04-2013
Publisher: American Physical Society (APS)
Date: 26-02-2018
Publisher: EDP Sciences
Date: 06-2012
Publisher: American Physical Society (APS)
Date: 12-05-2020
Publisher: American Physical Society (APS)
Date: 13-11-2020
Publisher: IOP Publishing
Date: 14-04-2016
Publisher: American Physical Society (APS)
Date: 16-04-2015
Publisher: American Physical Society (APS)
Date: 30-12-2015
Publisher: American Physical Society (APS)
Date: 17-11-2021
Publisher: American Physical Society (APS)
Date: 19-11-2020
Publisher: IOP Publishing
Date: 07-09-2015
Publisher: American Physical Society (APS)
Date: 05-07-2016
Publisher: American Physical Society (APS)
Date: 18-01-2017
Publisher: American Physical Society (APS)
Date: 15-07-2008
Publisher: IOP Publishing
Date: 09-03-2007
Publisher: IOP Publishing
Date: 2012
Publisher: Wiley
Date: 31-01-2022
Abstract: The Gamma Factory (GF) is an ambitious proposal, currently explored within the CERN Physics Beyond Colliders program, for a source of photons with energies up to ≈400 MeV and photon fluxes (up to ≈10 17 photons s −1 ) exceeding those of the currently available gamma sources by orders of magnitude. The high‐energy (secondary) photons are produced via resonant scattering of the primary laser photons by highly relativistic partially‐stripped ions circulating in the accelerator. The secondary photons are emitted in a narrow cone and the energy of the beam can be monochromatized, down to 10 −3 –10 −6 level, via collimation, at the expense of the photon flux. This paper surveys the new opportunities that may be afforded by the GF in nuclear physics and related fields.
Publisher: American Physical Society (APS)
Date: 30-07-2010
Publisher: American Physical Society (APS)
Date: 06-2020
Publisher: American Physical Society (APS)
Date: 21-12-2004
Publisher: American Physical Society (APS)
Date: 12-05-2016
Publisher: American Physical Society (APS)
Date: 07-05-2020
Publisher: American Physical Society (APS)
Date: 24-09-0024
Publisher: American Physical Society (APS)
Date: 29-05-2009
Publisher: American Physical Society (APS)
Date: 29-07-2015
Publisher: Springer International Publishing
Date: 2018
Publisher: American Physical Society (APS)
Date: 21-11-2011
Publisher: American Physical Society (APS)
Date: 21-07-2000
Publisher: American Physical Society (APS)
Date: 10-01-2006
Publisher: IEEE
Date: 08-2011
Publisher: American Physical Society (APS)
Date: 02-06-2011
Publisher: American Physical Society (APS)
Date: 17-10-2018
Publisher: Springer Science and Business Media LLC
Date: 11-12-2019
DOI: 10.1038/S41467-019-13406-9
Abstract: Recent theoretical works have proposed atomic clocks based on narrow optical transitions in highly charged ions. The most interesting candidates for searches of physics beyond the Standard Model are those which occur at rare orbital crossings where the shell structure of the periodic table is reordered. There are only three such crossings expected to be accessible in highly charged ions, and hitherto none have been observed as both experiment and theory have proven difficult. In this work we observe an orbital crossing in a system chosen to be tractable from both sides: Pr $${}^{9+}$$ 9 + . We present electron beam ion trap measurements of its spectra, including the inter-configuration lines that reveal the sought-after crossing. With state-of-the-art calculations we show that the proposed nHz-wide clock line has a very high sensitivity to variation of the fine-structure constant, $$\\alpha$$ α , and violation of local Lorentz invariance and has extremely low sensitivity to external perturbations.
Publisher: Oxford University Press (OUP)
Date: 23-10-2020
Abstract: The gravitational potential φ = GM/Rc2 at the surface of the white dwarf G191-B2B is 10,000 times stronger than that at the Earth’s surface. Numerous photospheric absorption features are detected, making this a suitable environment to test theories in which the fundamental constants depend on gravity. We have measured the fine structure constant, α, at the white dwarf surface, used a newly calibrated Hubble Space Telescope STIS spectrum of G191-B2B, two new independent sets of laboratory Fe V wavelengths, and new atomic calculations of the sensitivity parameters that quantify Fe V wavelength dependency on α. The two results obtained are: Δα/α0 = (6.36 ± 0.35stat ± 1.84sys) × 10−5 and Δα/α0 = (4.21 ± 0.48stat ± 2.25sys) × 10−5. The measurements hint that the fine structure constant increases slightly in the presence of strong gravitational fields. A comprehensive search for systematic errors is summarised, including possible effects from line misidentifications, line blending, stratification of the white dwarf atmosphere, the quadratic Zeeman effect and electric field effects, photospheric velocity flows, long-range wavelength distortions in the HST spectrum, and variations in the relative Fe isotopic abundances. None fully account for the observed deviation but the systematic uncertainties are heavily dominated by laboratory wavelength measurement precision.
Publisher: American Physical Society (APS)
Date: 29-11-2011
Publisher: American Physical Society (APS)
Date: 27-05-2011
Publisher: Elsevier BV
Date: 2010
Publisher: American Physical Society (APS)
Date: 12-03-2021
Publisher: IOP Publishing
Date: 19-11-2008
Publisher: American Physical Society (APS)
Date: 05-10-2007
Publisher: American Physical Society (APS)
Date: 09-08-2012
Publisher: American Physical Society (APS)
Date: 15-09-2020
Publisher: American Physical Society (APS)
Date: 09-12-2019
Publisher: American Physical Society (APS)
Date: 22-04-2022
Publisher: American Physical Society (APS)
Date: 03-07-2013
Publisher: American Physical Society (APS)
Date: 15-09-2020
Publisher: Springer Science and Business Media LLC
Date: 10-05-2011
Publisher: Oxford University Press (OUP)
Date: 30-03-2019
DOI: 10.1093/MNRAS/STZ739
Abstract: White dwarf (WD) atmospheres are subjected to gravitational potentials around 105 times larger than occur on Earth. They provide a unique environment in which to search for any possible variation in fundamental physics in the presence of strong gravitational fields. However, a sufficiently strong magnetic field will alter absorption line profiles and introduce additional uncertainties in measurements of the fine structure constant. Estimating the magnetic field strength is thus essential in this context. Here, we model the absorption profiles of a large number of atomic transitions in the WD photosphere, including first-order Zeeman effects in the line profiles, varying the magnetic field as a free parameter. We apply the method to a high signal-to-noise, high-resolution, far-ultraviolet Hubble Space Telescope/Space Telescope Imaging Spectrograph spectrum of the WD G191−B2B. The method yields a sensitive upper limit on its magnetic field of B & 2300 G at the 3σ level. Using this upper limit, we find that the potential impact of quadratic Zeeman shifts on measurements of the fine structure constant in G191−B2B is 4 orders of magnitude below laboratory wavelength uncertainties.
Publisher: American Physical Society (APS)
Date: 21-04-2021
Publisher: American Physical Society (APS)
Date: 25-11-2013
Publisher: IOP Publishing
Date: 15-03-2007
Publisher: EDP Sciences
Date: 2013
Start Date: 01-2012
End Date: 06-2016
Amount: $375,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2019
End Date: 07-2022
Amount: $240,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2011
End Date: 12-2014
Amount: $320,000.00
Funder: Australian Research Council
View Funded Activity