ANSTO Publications Online

Welcome to the ANSTO Institutional Repository known as APO.

The APO database has been migrated to version 7.5. The functionality has changed, but the content remains the same.

ANSTO Publications Online is a digital repository for publications authored by ANSTO staff since 2007. The Repository also contains ANSTO Publications, such as Reports and Promotional Material. ANSTO publications prior to 2007 continue to be added progressively as they are in identified in the library. ANSTO authors can be identified under a single point of entry within the database. The citation is as it appears on the item, even with incorrect spelling, which is marked by (sic) or with additional notes in the description field.

If items are only held in hardcopy in the ANSTO Library collection notes are being added to the item to identify the Dewey Call number: as DDC followed by the number.

APO will be integrated with the Research Information System which is currently being implemented at ANSTO. The flow on effect will be permission to publish, which should allow pre-prints and post prints to be added where content is locked behind a paywall. To determine which version can be added to APO authors should check Sherpa Romeo. ANSTO research is increasingly being published in open access due mainly to the Council of Australian University Librarians read and publish agreements, and some direct publisher agreements with our organisation. In addition, open access items are also facilitated through collaboration and open access agreements with overseas authors such as Plan S.

ANSTO authors are encouraged to use a CC-BY licence when publishing open access. Statistics have been returned to the database and are now visible to users to show item usage and where this usage is coming from.

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Communities in ANSTO Publications Online

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Now showing 1 - 5 of 5

Recent Submissions

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Inelastic neutron spectroscopy on biosurfaces: a search for fundamental mechanisms of complexation
(The Korean Vacuum Society, 2016-08-19) Stampfl, APJ
Not provided to ANSTO Library.
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Vibrational spectroscopy using the BeF spectrometer on TAIPAN
(Australian Institute of Nuclear Science and Engineering (AINSE), 2018-11-19) Stampfl, APJ; Rule, KC; Danilkin, SI
Vibrational spectroscopy using neutrons as a probe, as opposed to electromagnetic radiation, is a relatively new capability in Australia. A number of instruments at the Australian Centre for Neutron Scattering are capable of measuring vibrational density of states. In particular, the so-called Beryllium Filter Spectrometer, BeF, located on TAIPAN, is devoted to the measurement of vibrational density of states. Even though most scientists are familiar with techniques such as IR, Raman, NMR etc, vibrational spectroscopy using neutrons poses somewhat of a mystery as the equipment, technique, and analysis, are very different to those techniques using well-known electromagnetic probes. Unlike light that strongly interacts through the electromagnetic force with the electronic structure, neutron radiation interacts through that part of the residual strong force directly with the atomic nucleus. As a consequence, thermal neutrons probe directly vibrational motion: all excitations are observable because of the lack of selection rules, and scattering cross sections are isotopically sensitive. In particular, scattering from hydrogen allows molecular-like, or localised, modes to be probed. A weighted density of vibrational states is directly measured that can be compared to calculation. In this way the dynamics and mechanical interaction of molecular units may be directly investigated. For this presentation an overview of the BeF instrument is given, as well as the theory explaining how measured spectra are in fact the weighted density of vibrational states of the system under investigation. Analysis steps are given that take the raw spectra and turn them into spectra suitable for comparison to calculation
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Tuning the surface states of Fe3O4 nanoparticles for enhanced magnetic anisotropy and induction efficacy
(American Chemical Society, 2025-09-10) Portwin, KA; Galaviz, P; Li, XN; Hao, CY; Smillie, LA; You, MY; Stamper, CJ; Mole, RA; Yu, DH; Rule, KC; Cortie, DL; Cheng, ZX
Magnetite (Fe3O4) nanoparticles are crucial for biomedical applications, including magnetic hyperthermia, targeted drug delivery, and MRI contrast enhancement due to their biocompatibility and unique physicochemical properties. Here, we investigate how surface states influence their induction performance. Heat treatment removes surface water and FeOOH, forming a ฮณ-Fe2O3 shell, as confirmed by synchrotron powder diffraction, thermogravimetric analysis, X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, and time-of-flight inelastic neutron spectroscopy. AC magnetic susceptibility measurements reveal that this surface modification enhances magnetic anisotropy and reduces the spin relaxation time, leading to a 140% increase in the specific absorption rate. Additionally, the increased anisotropy suppresses the low-temperature clustered spin-glass transition and raises the blocking temperature. These findings highlight surface-state engineering as a powerful approach to optimizing Fe3O4 nanoparticles for biomedical applications. ยฉ 2025 American Chemical Society.
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Role of finite-temperature dynamics and dispersion interactions on the phonon bandgap in thermoelectric SnSe
(American Physical Society, 2024-09-18) Portwin, KA; Galaviz, P; Stamper, CJ; Kutteh, R; Yu, DH; Cheng, ZX; Cortie, DL; Rule, KC
The low lattice thermal conductivity in tin selenide is key to its excellent thermoelectric properties. The dominant mechanism for this phononic property, however, is debated. Past lattice-dynamic calculations for SnSe consistently predicted the existence of a phonon bandgap, which is puzzling as it has not been observed in spectroscopic experiments and is typically associated with low phonon-scattering rates in contrast to the observed physical properties. In this work, we accurately investigate the size of the phonon bandgap in SnSe using a direct comparison between experimental neutron spectroscopy, lattice-dynamic calculations, and ๐‘Žโข๐‘๐‘–โข๐‘›โข๐‘–โข๐‘กโข๐‘–โข๐‘œ molecular dynamics. We theoretically investigate the effects of van der Waals interactions in density functional theory calculations using the popular Grimme D2/D3 and semilocal methods and we also assess the effect of finite-temperature driven anharmonicity using Born-Oppenheimer ๐‘Žโข๐‘๐‘–โข๐‘›โข๐‘–โข๐‘กโข๐‘–โข๐‘œ molecular dynamics. The D2/D3 lattice dynamics calculations, which assume 0 K, predict a phonon bandgap, although the size and structure depends on the details of the van der Waals correction. In contrast, both the experiment and ๐‘Žโข๐‘๐‘–โข๐‘›โข๐‘–โข๐‘กโข๐‘–โข๐‘œ dynamics identify there is a valley in the density of states at finite temperature, ascribed to strong anharmonicity that shifts specific phonon modes. This finding highlights the need for great care when applying 0 K lattice dynamics and dispersion corrections to SnSe, with general implications for designing thermoelectric materials via computational methods. ยฉ2025 American Physical Society.
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Migration of uranium: integrating geochemistry with biomonitoring to evaluate and predict its environmental impact
(De Gruyter, 1994-12-01) Brown, PL; Markich, SJ; Jeffree, RA
The potential ecological impact of the migration of uranium, at concentrations elevated above background, in receiving waters downstream of a uranium mine site has been investigated by integrating geochemical and biomonitoring techniques. This study concluded that selected behavioural responses of a fresh-water bivalve species, exposed to a variety of uranium concentrations in a synthetic river water, both in the presence and absence of a model fulvic acid (FA), was closely correlated with the inorganic forms of uranyl present, as predicted using the geochemical code HARPHRQ. Tha addition of a defined quantity of a model FA to the synthetic water ameliorated the behavioural responses of bivalves to uranium, by complexation with the model FA. To properly model and evaluate the geochemical behvaiour of uranium in aquatic systems requires the inclusion of data on interactions between the uranium and humic substances, especially FA. Geochemical modelling of the speciation of uranium may assist in predicting its impact on biota exposed to elevated concentrations in natural waters resulting from releases of uranium mine effluent. ยฉ 2013 Oldenbourg Wissenschaftsverlag GmbH,