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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Stacking disorder in novel ABAC-stacked brochantite, Cu4SO4(OH)6
(American Physical Society, 2025-05-23) Chakkingal, AM; Fuller, CA; Avdeev, M; Gumeniuk, R; Parui, KK; Rahn, MC; Pabst, F; Wang, Y; Granovsky, S; Korshunov, A; Chernyshov, D; Inosov, DS; Peets, DC
In geometrically frustrated magnetic systems, weak interactions or slight changes to the structure can tip the delicate balance of exchange interactions, sending the system into a different ground state. Brochantite, Cu4 SO4 (OH)6, has a copper sublattice composed of distorted triangles, making it a likely host for frustrated magnetism, but it exhibits stacking disorder. The lack of synthetic single crystals has limited research on the magnetism in brochantite to powders and natural mineral crystals. We grew crystals which we find to be a new polytype with a tendency toward ABAC stacking and some anion disorder, alongside the expected stacking disorder. Comparison to previous results on natural mineral specimens suggests that cation disorder is more deleterious to the magnetism than anion and stacking disorder. Our specific heat data suggest a double transition on cooling into the magnetically ordered state. ©2025 American Physical Society.
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Dynamics of the frustrated spin in the low dimensional magnet Co3(OH)2(C4O4)2
(IOP Publishing, 2016-03-31) Mole, RA; Rule, KC; Yu, DH; Stride, JA; Nadeem, MA; Wood, PT
We describe powder inelastic neutron scattering experiments on a porous coordination polymer Co3(OH)2(C4O4)2, which has two different ordered magnetic phases known to display spin frustrated behaviour, resulting in an idle-spin phase. The moment on each ion is represented by an effective total angular moment J eff = 1/2. A non-dispersive magnetic mode was observed in the idle-spin phase which is described by a simple dimer model that assumes ΔJ = 0. The excitation was found to persist well above the long range ordering temperature into the paramagnetic region. A combination of frustration, the J eff = 1/2 and low dimensionality may induce these quantum phenomena. © 2016 IOP Publishing Ltd.
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Determination of radiation hardness of silicon diodes
(Elsevier, 2019-06-15) Vittone, E; Lopez, JG; Jaksic, M; Ramos, MCJ; Lohstroh, A; Pastuovic, Z; Rath, S; Siegele, R; Skukan, N; Vizkelethy, G; Simon, A
In this paper, we describe an experiment aimed to measure the physical observables, which can be used for the assessment of the radiation hardness of commercially available silicon photo diodes commonly used as nuclear detectors in particle accelerator laboratories. The experiment adopted the methodology developed during the International Atomic Energy Agency (IAEA) Coordinated Research Project (CRP No. F11016) “Utilization of Ion Accelerators for Studying and Modelling Ion Induced Radiation Defects in Semiconductors and Insulators”. This methodology is based on the selective irradiation of micrometer-sized regions with different fluences of MeV ions using an ion microbeam and on the measurement of the charge collection efficiency (CCE) degradation by Ion Beam Induced Charge (IBIC) microscopy performed in full depletion condition, using different probing ions. The IBIC results are analyzed through a theoretical approach based on the Shockley-Read-Hall model for the free carrier recombination in the presence of ion-induced deep traps. This interpretative model allows the evaluation of the material radiation hardness in terms of recombination parameters for both electrons and holes. The device under study in this experiment was a commercial p-i-n photodiode, which was initially characterized by i) standard electronic characterization techniques to determine its doping and ii) the Angle-Resolved IBIC to evaluate its effective entrance window. Nine regions of (100 × 100) µm 2 were irradiated with 11.25 MeV He ions up to a maximum fluence of 3·10 12 ions/cm 2 . The CCE degradation was measured by the IBIC technique using 11.25 MeV He and 1.4 MeV He as probing ions. The model presented here proved to be effective for fitting the experimental data. The fitting parameters correspond to the recombination coefficients, which are the key parameters for the characterization of the effects of radiation damage in semiconductors. © 2019 Elsevier B.V.
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Multielemental analysis and characterization of fine aerosols at several key ACE‐Asia sites
(American Geophysical Union, 2004-08-05) Cohen, DD; Garton, DB; Stelcer, E; Hawas, O; Wang, T; Poon, S; Kim, JY; Choi, BC; Oh, SN; Shin, HJ; Ko, MY; Uematsu, M
PM2.5 and PM10 particle size fractions were measured every Wednesday and Sunday for an 18‐month period from 1 January 2001 at three key ACE‐Asia sites: Hong Kong, Cheju Island in southern Korea, and Sado Island in Japan. Median 24 hour PM2.5 mass loadings of 29, 16, and 9.1 μg/m3 and coarse mass loadings of 33, 14, and 11 μg/m3 were measured at Hong Kong, Cheju, and Sado Island sites, respectively, during the study period. The corresponding maximum PM2.5 and coarse mass values for the three sites were 109, 81, and 78 μg/m3 and 101, 162, and 253 μg/m3, respectively. Accelerator‐based ion beam analysis (IBA) techniques were used to quantify major components as well as significant trace elements. These included total hydrogen, black carbon, F, Na, Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Br, and Pb, with detection limits close to or below 1 ng/m3. The average PM2.5 percentage composition by weight across the three sites was estimated to be around (8.4 ± 4)% black carbon, (7.7 ± 7)% soil, (43 ± 14)% ammonium sulfate, (11 ± 16)% organic matter, (10 ± 12)% salinity, and (0.6 ± 0.3)% trace elements. Soil fingerprints for the east Asian region were generated using oxides of measured Al, Si, K, Ca, Ti, Mn, and Fe concentrations. The coarse fraction was dominated by wind blown soil (23%) and sea salts (48%). [PM10/PM2.5] mass ratios were typically (2.1 ± 0.4) averaged across all sites for the whole year. [PM10/PM2.5] mass ratios for the 21 IBA elements analyzed were also provided. This quantitative data providing both masses and dates over an 18‐month period provide useful input for aerosol transport modeling for the east Asia region. © 2025 American Geophysical Union.
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Complex field-induced states in linarite PbCuSO4(OH)2 with a variety of high-order exotic spin-density wave states
(American Physical Society, 2016-01-27) Willenberg, B; Schäpers, M; Wolter, AUB; Drechsler, SL; Reehuis, M; Hoffmann, JU; Büchner, B; Studer, AJ; Rule, KC; Ouladdiaf, B; Süllow, S; Nishimoto, S
Low-temperature neutron diffraction and NMR studies of field-induced phases in linarite are presented for magnetic fields Hb axis. A two-step spin-flop transition is observed, as well as a transition transforming a helical magnetic ground state into an unusual magnetic phase with sine-wave-modulated moments H. An effective J1-J2 single-chain model with a magnetization-dependent frustration ratio αeff=-J2/J1 is proposed. The latter is governed by skew interchain couplings and shifted to the vicinity of the ferromagnetic critical point. It explains qualitatively the observation of a rich variety of exotic longitudinal collinear spin-density wave, SDWp, states (9≥p≥2). ©2025 American Physical Society. All rights reserved.