19 Works

High-energy quasi-monoenergetic neutron fields: existing facilities and future needs

S. Pomp, D.T. Bartlett, S. Mayer, G. Reitz, S. Röttger, M. Silari, F.D. Smit, H. Vincke & H. Yasuda
Abstract: High-energy neutrons are the dominant component of the prompt radiation field present outside the shielding of high-energy accelerators, and are a significant component of the cosmic radiation fields in aircraft and in spacecraft. In radiotherapy using high-energy medical accelerators, high-energy neutrons are a secondary component of the fields in the beam delivery system and in the patient’s body. The range of neutron energies in these fields extends from thermal energies to several GeV, and...

EURADOS Intercomparison 2012 for Neutron Dosemeters

Elena Fantuzzi, Marie-Anne Chevallier, Rodolfo Cruz-Suarez, Marlies Luszik-Bhadra, Sabine Mayer, David J. Thomas, Rick Tanner & Filip Vanhavere
Abstract: EURADOS, within the work performed by Working Group 2 -Harmonization of Individual Monitoring in Europe, has started a self-sustained programme of regular intercomparisons and has successfully executed three intercomparisons for whole body photon dosemeters (IC2008, IC2010, IC2012) and one intercomparison for extremity dosemeters for photon and beta fields (IC2009). In 2012, the EURADOS intercomparison IC2012n was launched for personal neutron dosemeters routinely used to measure personal dose equivalent, Hp(10), in individual monitoring. No systems...

Data from: The anatomy, taphonomy, taxonomy and systematic affinity of Markuelia: Early Cambrian to Early Ordovician scalidophorans

Xi-Ping Dong, Stefan Bengston, Neil J. Gostling, John A. Cunningham, Thomas H. P. Harvey, Artem Kouchinsky, Anatoly K. Val'kov, John E. Repetski, Marco Stampanoni, Federica Marone & Philip C. J. Donoghue
Markuelia is a vermiform, annulated introvertan animal known as embryonic fossils from the Lower Cambrian to Lower Ordovician. Analysis of an expanded and revised dataset for Introverta shows that the precise position of Markuelia within this clade is dependent on the taxa included. As a result, Markuelia is assigned to the scalidophoran total group to reflect uncertainty as to whether it is a stem-scalidophoran or a stem-priapulid. The taxonomy of the genus is revised to...

EURADOS Intercomparison IC2017n for Neutron Dosemeters

Sabine Mayer, Marie-Anne Chevallier, Elena Fantuzzi, Michael Hajek, Marlies Luszik-Bhadra, Rick Tanner, David J. Thomas & Filip Vanhavere
Abstract: EURADOS has carried out a number of different intercomparison exercises for personal dosemeters in the past that qualify as proficiency tests for different dosimetry systems and radiation types including one previous neutron personal dosemeter intercomparison (IC2012n). Neutron intercomparisons are especially complicated to design because of the limited availability of reference fields and the costs associated with the exposures. IC2017n was the second EURADOS organized intercomparison exercise for neutron personal dosemeters. It was an important...

Data from: Growth and carbon relations of mature Picea abies trees under 5 years of free-air CO2 enrichment

Tamir Klein, Martin K. F. Bader, Sebastian Leuzinger, Manuel Mildner, Patrick Schleppi, Rolf T. W. Siegwolf, Christian Koerner, Martin K.-F. Bader & Rolf T.W. Siegwolf
Are mature forests carbon limited? To explore this question, we exposed ca. 110-year-old, 40-m tall Picea abies trees to a 550-ppm CO2 concentration in a mixed lowland forest in NW Switzerland. The site receives substantial soluble nitrogen (N) via atmospheric deposition, and thus, trees are unlikely N-limited. We used a construction crane to operate the free-air CO2 release system and for canopy access. Here, we summarize the major results for growth and carbon (C) fluxes....

Metaschoepite dissolution in sediment column systems – groundwater/soil geochemistry and uranium X-ray spectroscopy data

W. Bower, K. Morris, F.R. Livens, J.F.W. Mosselmans, C.M. Fallon, A.J. Fuller, L.S. Natrajan, C. Boothman, J.R. Lloyd, S. Utsunomia, D. Grolimund, D. Ferreira Sanchez, T. Jilbert, J.E. Parker, T. Neill & G. Law
This dataset contains the results of a laboratory study investigating the dissolution of UO3•nH2O particles in dynamic sediment/groundwater column systems, representative of the shallow subsurface at the Sellafield Ltd. site, UK. Measurements were carried out to determine the extent of uranic particle dissolution and the speciation of dissolved uranium within the columns under contrasting biogeochemical conditions (oxic and electron-donor amended). Columns effluents were analysed periodically for key biogeochemical indicators (nitrate, sulfate) and trace metals (iron,...

Data from: Synchrotron X-ray tomographic microscopy of fossil embryos

Philip C. J. Donoghue, Stefan Bengtson, Xi-Ping Dong, Neil J. Gostling, Therese Huldtgren, John A. Cunningham, Chongyu Yin, Zhao Yue, Fan Peng & Marco Stampanoni
Fossilized embryos from the late Neoproterozoic and earliest Phanerozoic have caused much excitement because they preserve the earliest stages of embryology of animals that represent the initial diversification of metazoans. However, the potential of this material has not been fully realized because of reliance on traditional, non-destructive methods that allow analysis of exposed surfaces only, and destructive methods that preserve only a single two-dimensional view of the interior of the specimen. Here, we have applied...

Data from: The ovipositor actuation mechanism of a parasitic wasp and its functional implications

Noraly M.M.E. Van Meer, Uroš Cerkvenik, Christian M. Schlepütz, Johan L. Van Leeuwen & Sander W. S. Gussekloo
Parasitic wasps use specialized needle-like structures­­—ovipositors—to drill in substrates to reach hidden hosts. The external ovipositor (terebra) consists of three interconnected, sliding elements (valvulae) which are moved reciprocally during insertion. This presumably reduces the required pushing force on the terebra and limits the risk of damage whilst probing. Although this is an important mechanism, it is still not completely understood how the actuation of the valvulae is achieved, and it has only been studied with...

Data associated with 'Time-resolved visualization of the magnetization canting induced by field-like spin-orbit torques'

Simone Finizio, Sebastian Wintz, Sina Mayr, Alexandra Huxtable, Manuel Langer, Joe Bailey, Gavin Burnell, Christopher Marrows & Joerg Raabe
Data supporting the findings of the study 'Time-resolved visualization of the magnetization canting induced by field-like spin-orbit torques'. The data are scanning x-ray transmission micrographs. The file metadata.txt describes the contents and is contained in the zip file.

EURADOS Stakeholder Workshop on June 30th, 2016

Rühm Werner, Željka Knežević, Elena Fantuzzi, Roger Harrison, Helmut Schuhmacher, Filip Vanhavere, Joao Alves, Jean-Francois Bottolier-Depois, Paola Fattibene, Phil Gilvin, María Antonia Lopez, Sabine Mayer, Saveta Miljanić, Pawel Olko, Hannes Stadtmann, Rick Tanner, Arturo Vargas & Clemens Woda
Introduction: On June 30th, 2016, the “First EURADOS Stakeholder Workshop” was held at the Helmholtz Center Munich (HMGU) in Neuherberg, Germany. The workshop was jointly organized by the HMGU and the EURADOS Office in conjunction with the 57thEURADOS Council meeting, which took place on June 29thand July 1st, also at the HMGU. In the frame of the “European Joint Programme for the Integration of Radiation Protection Research”, the CONCERT project funded by the European Commission...

Data from: Early post-metamorphic, Carboniferous blastoid reveals the evolution and development of the digestive system in early echinoderms

Imran A. Rahman, Johnny A. Waters, Colin D. Sumrall & Alberto Astolfo
Inferring the development of the earliest echinoderms is critical to uncovering the evolutionary assembly of the phylum-level body plan but has long proven problematic because early ontogenetic stages are rarely preserved as fossils. Here, we use synchrotron tomography to describe a new early post-metamorphic blastoid echinoderm from the Carboniferous (approx. 323 Ma) of China. The resulting three-dimensional reconstruction reveals a U-shaped tubular structure in the fossil interior, which is interpreted as the digestive tract. Comparisons...

Data from: Spatial variation in throughfall, soil, and plant water isotopes in a temperate forest

Gregory R. Goldsmith, Scott T. Allen, Sabine Braun, Nadine Engbersen, Clara Romero González-Quijano, James W. Kirchner & Rolf T.W. Siegwolf
Studies of stable isotopes of water in the environment have been fundamental to advancing our understanding of how water moves through the soil-plant-atmosphere continuum; however, much of this research focuses on how water isotopes vary in time, rather than in space. We examined the spatial variation in the δ18O and δ2H of throughfall and bulk soil water, as well as branch xylem and bulk leaf water of Picea abies (Norway Spruce) and Fagus sylvatica (Beech),...

Data from: Dietary specializations and diversity in feeding ecology of the earliest stem mammals

Pamela G. Gill, Mark A. Purnell, Nick Crumpton, Kate Robson Brown, Neil J. Gostling, Marco Stampanoni & Emily J. Rayfield
Morganucodon mandible CT slice videoMorganucodon.mpgKuehneotherium mandible CT scan videoKuehneotherium.mpg

Reduction of the Ordered Magnetic Moment by Quantum Fluctuation in the Antiferromagnetic Spin-5 2 Dimer Compound FeVMoO7

Masashi Hase, James R. Hester, Kirrily C. Rule, Vladimir Yu. Pomjakushin, Akira Matsuo & Koichi Kindo
We investigated the magnetism of FeVMoO7 by performing magnetization, specific heat, electron spin resonance, and neutron diffraction experiments. We observed an antiferromagnetically ordered state below T_N = 10.8 K. We consider that the probable spin model is an interacting antiferromagnetic spin-5/2 dimer model where spin dimers are connected by interdimer interactions. The intradimer interaction was evaluated to be J = 10.5 +- 0.5 K. The magnitude of ordered magnetic moments is 4.00(7) mu_B at 4...

Visions for Radiation Dosimetry over the Next Two Decades – Strategic Research Agenda of the European Radiation Dosimetry Group

Werner Rühm, Elena Fantuzzi, Roger Harrison, Helmut Schuhmacher, Filip Vanhavere, Joao Alves, Jean-Francois Bottolier-Depois, Paola Fattibene, Željka Knežević, María Antonia Lopez, Sabine Mayer, Saveta Miljanić, Stefan Neumaier, Pawel Olko, Hannes Stadtmann, Rick Tanner & Clemens Woda
Abstract: The European Radiation Dosimetry Group (EURADOS) comprises a self-sustainable network of more than 60 European institutions such as reference and research laboratories, dosimetry services and companies, as well as more than 300 scientists active in the field of radiation dosimetry. The aim of the network is to promote research and development and European cooperation in the field of dosimetry of ionizing radiation and its implementation in routine practice, in order to contribute to compatibility...

Data from: Unstable infiltration experiments in dry porous media

C. J. M. Cremer, C. Schuetz, I. Neuweiler, P. Lehmann & E. H. Lehmann
Prediction of infiltration in porous media is challenged by finger formation and unstable displacement of the wetting front. We present a systematic experimental study on the effect of packings and infiltration rates on unstable flow into initially dry porous media. We conducted small two- and three-dimensional experiments where water contents were measured with neutron radiography and larger two-dimensional experiments, which we evaluated by obtaining commonly used finger properties such as width and velocity from image...

Data from: X-rays and virtual taphonomy resolve the first Cissus (Vitaceae) macrofossils from Africa as early diverging members of the genus

Neil F. Adams, Margaret E. Collinson, Selena Y. Smith, Marion K. Bamford, Félix Forest, Panagiota Malakasi, Federica Marone & Dan Sykes
PREMISE OF THE STUDY: Fossilized seeds similar to Cissus (Vitaceae) have been recognized from the Miocene of Kenya, though some were previously assigned to the Menispermaceae. We undertook a comparative survey of extant African Cissus seeds to identify the fossils and consider their implications for the evolution and biogeography of Cissus and for African early Miocene paleoenvironments. METHODS: Micro-computed tomography (µCT) and synchrotron-based X-ray tomographic microscopy (SRXTM) were used to study seed morphology and anatomy....

Data from: Experiments and modelling of rate-dependent transition delay in a stochastic subcritical bifurcation

Giacomo Bonciolini, Dominik Ebi, Edouard Boujo & Nicolas Noiray
Complex systems exhibiting critical transitions when one of their governing parameters varies are ubiquitous in nature and in engineering applications. Despite a vast literature focusing on this topic, there are few studies dealing with the effect of the rate of change of the bifurcation parameter on the tipping points. In this work, we consider a subcritical stochastic Hopf bifurcation under two scenarios: the bifurcation parameter is first changed in a quasi-steady manner and then, with...

Data from: Structural mouthpart interaction evolved already in the earliest lineages of insects

Alexander Blanke, Peter T. Rühr, Rajmund Mokso, Pablo Villanueva, Fabian Wilde, Marco Stampanoni, Kentaro Uesugi, Ryuichiro Machida & Bernhard Misof
In butterflies, bees, flies and true bugs specific mouthparts are in close contact or even fused to enable piercing, sucking or sponging of particular food sources. The common phenomenon behind these mouthpart types is a complex composed of several consecutive mouthparts which structurally interact during food uptake. The single mouthparts are thus only functional in conjunction with other adjacent mouthparts, which is fundamentally different to biting–chewing. It is, however, unclear when structural mouthpart interaction (SMI)...

Registration Year

  • 2021
    7
  • 2020
    1
  • 2019
    2
  • 2018
    2
  • 2016
    2
  • 2015
    2
  • 2014
    1
  • 2012
    2

Resource Types

  • Dataset
    13
  • Data Paper
    5
  • Text
    1

Affiliations

  • Paul Scherrer Institute
    19
  • Helmholtz Zentrum München
    4
  • Institut de Radioprotection et de Sûreté Nucléaire
    4
  • Belgian Nuclear Research Centre
    4
  • University of Bristol
    4
  • Physikalisch-Technische Bundesanstalt
    4
  • Public Health England
    3
  • National Agency for New Technologies Energy and Sustainable Economic Development
    3
  • International Atomic Energy Agency
    2
  • National Physical Laboratory
    2