bluuebunny/crossref_metadata_2025_split huggingface dataset:
Measurement of the structure of potential cluster bands and absolute branching ratios of high-energy states in 18O*
Authors: Pirrie S. , Wheldon C. , Kokalova Tz. , Bishop J. , Hertenberger R. , Wirth H.-F. , Bailey S. , Curtis N. , Dell’Aquila D. , Faestermann Th. , Mengoni D. , Smith R. , Torresi D. , Turner A. 
Published: December 2020

Abstract
The investigation of nuclei with potential α-cluster structure is of great importance to the understanding of nuclear structure, both in the testing of theoretical models and for the study of the synthesis of elements in stars. The 18O nucleus is an excellent candidate to test for such a system, and an experiment has been performed in order to determine the validity of proposed cluster bands in 18O, by measuring absolute branching ratios for high-energy excited states. In order to accurately measure these branching ratios, Monte-Carlo techniques have been employed allowing for the precision reproduction of data gathered throughout the experiment. An in-depth description of the considerations required when simulated data for these experiments and comparisons between features in real and simulated data are presented.
The study of the properties of spontaneously fissioning transfermium nuclei synthesized in the complete fusion reactions with heavy ions
Authors: Svirikhin A I , Andreev A V , Yeremin A V , Izosimov I N , Isaev A V , Kuznetsov A N , Kuznetsova A A , Malyshev O N , Popeko A G , Popov Y A , Sokol E A , Chelnokov M L , Chepigin V I , Schneidman T M , Tezekbayeva M S , Andel B , Mosat P , Kalaninova Z , Asfari M Z , Gall B , Dorvaux O , Piot Julien , Stefanova E A , Tonev D V , Hauschild K , Lopez-Martenz A , Rezynkina K 
Published: December 2020

Abstract
This report describes a series of experiments aimed on investigating characteristics of spontaneous fission of nuclei in the exotic region of short-lived neutron-deficient isotopes with Z ≥ 100. Unique data on the decay properties of neutron-deficient isotopes 244,246Fm, 250No, 252No, 254Rf and 256Rf produced in the complete fusion reactions with accelerated heavy ions 40Ar + 206,208Pb → 246,248Fm*, 48Ca + 204,206Pb → 252,254No*, 50Ti + 206,208Pb →256,258Rf* were obtained in experiments at the VASSILISSA (SHELS) separator combined with a neutron detector.
Probing the nuclear structure of candidates for neutrinoless double-beta decay with fast neutrons
Authors: Yates S W , Mukhopadhyay S , Crider B P , Peters E E , Ramirez A P D 
Published: December 2020

Abstract
The low-lying, low-spin levels of several nuclei which are either the possible parent or daughter for neutrinoless double-beta decay have been studied with the (n,n’γ) reaction. From these measurements, level spins, level lifetimes, γ-ray intensities, and multipole mixing ratios were determined; however, considerable effort must be expended in elaborating the level schemes before comparisons of the level characteristics with large-scale shell model calculations are meaningful.
Teaching university physics to students from different school systems: Australia’s state-based education
Authors: Fraser P R , Sidhu L A , Jovanoski Z , Hutchison W D , Tran T P , Arnold J 
Published: December 2020

Abstract
In Australia, the provision of education is a state or territory responsibility. As different states have different curricula and assessment methods, the competencies of students commencing university studies may vary more than secondary school marks may suggest.
We compare secondary school results with outcomes of first-year undergraduate physics studies, as undertaken at the Australian Defence Force Academy. This institution is quite unique, as it draws a student cohort from each jurisdiction.
Spin-Zero Polarimetry for Linearly Polarised Photons at MAMI
Authors: Powell Abby 
Published: December 2020

Abstract

Background: The tagged Coherent Bremsstrahlung technique is used to provide beams of linearly polarised photons at several of the world’s leading photonuclear facilities, including MAMI in Mainz, ELSA at Bonn, and GlueX at Jefferson Laboratory. The degree of linear polarisation in real photon experiments has direct impact on measurements of polarisation observables. Measurement of the linear polarisation is often the biggest source of systematic error in these experiments. Continuous, in-beam measurement will also allow the beam position to be adjusted to optimise the polarisation. Purpose: To determine whether it is possible to make an improved measurement of the degree of linear polarisation using a polarimeter based on a 12C target. Methods: Coherent π0 meson production from a spin-zero nucleus has a photon asymmetry of 1 and hence provides a direct method of measuring the beam polarisation. Results: Current methods of measurement are being employed as a comparison. Simulated statistics of π0 mesons produced off the polarimeter suggest the measurement is viable. Early results from production data support the viability of live, event-by-event measurements of the polarisation using this method. Conclusions: A spin-zero nucleus such as carbon will be developed as a polarimeter for measuring the degree of linear polarisation in hadron physics experiments with tagged photons of up to 1557 MeV.
Has the neutral double hypernucleus

n∧∧4

been observed?
Authors: Schupp Falk , Bleser Sebastian , Bölting Michael , Pochodzalla Josef , Steinen Marcell , Gaitanos Theodoros 
Published: December 2020

Abstract
The BNL-AGS E906 experiment was the first fully electronic experiment to produce and study double hypernuclei with large statistics. Unfortunately, the interpretation of the measured π−−π− momentum correlation is still blurry because the hypothesized production of

Λ
3

H

+
Λ
4

H

pairs remains questionable. We show, that neither a scenario where the hypernuclei are produced after the capture of a stopped Ξ− by a 9Be nucleus nor interactions of energetic Ξ− with 9 Be nuclei in the target material can produce a sufficient amount of such pairs. We have therefore explored the conjecture that decays of the

n

∧∧
4

may be responsible for the observed structure. Indeed, the inclusion of

n

∧∧
4

with a two-body π− branching ratio of 50% in the statistical multifragmentation model allows to describe the E906 data remarkably well.
Search for η’-mesic nuclei using (p,d) reaction with FRS/Super-FRS at GSI/FAIR
Authors: Tanaka Y. K. , Bagchi S. , Benlliure J. , Dickel T. , Drozd V. , Ekawa H. , Fujioka H. , Geissel H. , Goldenbaum F. , Guo C. , Haettner E. , Harakeh M. N. , Hayano R.S. , Hirenzaki S. , Hornung C. , Igarashi Y. , Ikeno N. , Itahashi K. , Iwasaki M. , Jido D. , Kalantar-Nayestanaki N. , Kanungo R. , Kindler B. , Knöbel R. , Kostyleva D. , Kurz N. , Kuzminchuk N. , Lommel B. , Ma Y. , Matsumoto S. Y. , Metag V. , Minami S. , Moskal P. , Mukha I. , Nagae T. , Nagahiro H. , Nakagawa M. , Ong H. J. , Outa H. , Pietri S. , Plass W. R. , Prochazka A. , Purushothaman S. , Rappold C. , Ritman J. , Rodríguez-Sánchez J.L. , Ruber R. , Rundel O. , Saito T. R. , Scheidenberger C. , Sekiya R. , Serdyuk V. , Simon H. , Sitar B. , Skurzok M. , Strmen P. , Sun B. , Szarka I. , Takechi M. , Tanihata I. , Terashima S. , Weick H. , Yamamoto A. , Zhao J. 
Published: December 2020

Abstract
We plan a semi-exclusive measurement of the 12C(p,dp) reaction to search for η’-mesic nuclei, aiming at investigating in-medium properties of the η′-meson. We employ a 2.5 GeV proton beam impinging on a carbon target to produce η′-mesic 11C nuclei via the 12C(p,d)η′⊗11C reaction. Using coincidence measurements of the forward going deuterons, important for missing-mass spectroscopy, and decay protons emitted from the η′-mesic nuclei. for event selection will provide a high experimental sensitivity to observe η’-mesic nuclei. We will perform the measurements by combining the WASA detector system with the fragment separator FRS at GSI and also with the Super-FRS at FAIR in the future. The plan of the experiments and the present status are reported.
Energy, angular momentum and pressure force distributions inside nucleons
Authors: Lorcé C 
Published: December 2020

Abstract
We review some of the recent developments regarding mass, angular momentum and pressure forces inside hadrons. These properties are all encoded in the energy-momentum tensor of the system, which is described at the non-perturbative level in terms of gravitational form factors. Similarly to electromagnetic form factors, Fourier transforms of gravitational form factors allow one to map out the distribution of the above mechanical properties in position space, providing a whole new way of studying in detail the internal structure of hadrons.
Deeply virtual Compton Scattering off 4He
Authors: Fucini Sara , Scopetta Sergio , Viviani Michele 
Published: December 2020

Abstract
Deeply virtual Compton scattering is a fascinating process which can provide a tomographic view of nuclei and bound nucleons. The first experimental results for 4He targets, recently released at Jefferson Lab, have been analyzed here in a rigorous Impulse Approximation scenario. For both the coherent and incoherent channels of the process, the main experimental observables have been written in terms of state-of-the-art models of the nuclear spectral function and of the parton structure of the bound proton. A good overall agreement with the data is obtained. The calculation shows that a comparison of our conventional results with future precise data can expose novel quark and gluon effects in nuclei.
Proof of Concept for a Virtual Reality Intervention Evaluation and Training Platform for Highly Radioactive Environments
Authors: Cryer Alice , Kapellmann-Zafra Gabriel , Abrego-Hernández Samantha , Marin-Reyes Hector , French Richard 
Published: December 2020

Abstract
This paper presents a novel way to predict radiation dose using immersive Virtual Reality (VR). The platform allows an assessment of proposed interventions in as much detail and time as required. Its purpose is to give users the maximum amount of agency while in the environment. Workers get a realistic experience practising jobs and supervisors can oversee the expected radiation doses for each intervention.
A proof of concept performed and showed the platform returned a comparable result to the real radiation exposure for a predefined route. The errors of the system are dependant on the dose map. With an accurate dose map, the system will produce reliable results.
High resolution β — γ coincidence spectrometry at the UK CTBT Radionuclide Laboratory
Authors: Goodwin M. , Britton R. , Davies A. , Regan P. H. , Bell S. 
Published: December 2020

AbstractDetection of radioxenon is often considered the most probable indicator of an underground nuclear explosion. GBL15 is the UK’s Comprehensive Nuclear-Test-Ban Treaty Certified Radionuclide Laboratory, operated at AWE Aldermaston and has a history of developing high fidelity coincidence detection systems for particulate radionuclides. The Laboratory also operates a SAUNA II system, using NaI(Tl) and plastic scintillator detectors to measure β –γcoincidences from the decay of the four radioxenon isotopes, namely133Xe,135Xe,131mXe &133mXe. Here the efforts to date in exploring new technologies for next generation laboratory-basedβ – γcoincidence spectrometry for radioxenon measurements are discussed. Results are presented from preliminary measurements using a PIPSBox detector with a high purity germaniumγdetector and the output compared to that of lower resolution systems. This investigation will be used to scope future programmes on the technology used for the measurement of radioactive noble gas nuclides at GBL15.
Targeted α therapy with 213Bi and 225Ac
Authors: Kellerbauer A , Bruchertseifer F , Malmbeck R , Morgenstern A 
Published: December 2020

Abstract
The molecularly targeted treatment of cancerous tumors by the alpha-emitting radionuclides 213Bi and 225Ac has shown remarkable efficacy in clinical trials. Ultimately, this treatment option will be applicable to a wide range of cancers and other diseases, subject to the development of specific radioligands. Currently 225Ac is mainly being produced from the decay of existing stocks of 229Th. The expected wider application for radiotherapy will require many orders of magnitude more radionuclide than can currently be produced. Consequently, various alternative production methods are being pursued.
Application of plasma mass spectrometry for half-life measurement of medium and long-lived radionuclides
Authors: Braysher Emma , Russell Ben , Read David 
Published: December 2020

Abstract
When combined with established primary counting techniques, atom counting using inductively coupled plasma mass spectrometry (ICP-MS) can be a powerful metrological tool for providing updated, precise half-life values for medium and long-lived radionuclides, giving end-users increased confidence in measurement for a range of nuclear applications. ICP-MS is increasingly being used for this application, and this study outlines the methods for atom counting using the latest generation tandem ICP-MS/MS. The aim is to provide a consistent methodology that is currently lacking, and attention is paid to the importance of interference removal and minimising uncertainties, with preliminary results given for uranium isotopes.
Determination of beta-delayed neutron emission probability limits of rhodium isotopes by gamma-ray spectroscopy
Authors: Shearman R , Lorusso G , Boso A , Regan P H , Nishimura S , Xu Z Y , Jungclaus A , Shimizu Y , Simpson G S , Söderström P-A , Watanabe H , Browne F , Doornenbal P , Gey G , Jung H S , Meyer B , Sumikama T , Taprogge J , Vajta Zs , Wu J , Baba H , Benzoni G , Chae K Y , Crespi F C L , Fukuda N , Gernhäuser R , Inabe N , Isobe T , Kajino T , Kameda D , Kim G D , Kim Y-K , Kajouharov I , Kondev F G , Kubo T , Kurz N , Kwon Y K , Lane G J , Li Z , Montaner-Pizá A , Moschner K , Naqvi F , Niikura M , Nishibata H , Odahara A , Orlandi R , Patel Z , Podolyák Zs , Sakurai H , Schaffner H , Schury P , Shibagaki S , Steiger K , Suzuki H , Takeda H , Wendt A , Yagi A , Yoshinaga K 
Published: December 2020

Abstract
The decay of five neutron-heavy rhodium isotopes were studied at the Radioactive Isotope Beam Factory (RIBF) Facility at the RIKEN Nishina Center after relativistic fission of 238U beam on a thick beryllium target. Previously unknown associated gamma-ray decay energies are reported for each nuclide, and through evaluating the intensity of the 2+ → 0+ E2 transition in the even-even palladium daughter nuclei, 120,122,124Pd, from the beta-tagged gamma-ray spectra an upper or lower limit of beta-delayed neutron emission is deduced for each nuclei. A general, expected trend of increasing Pn
is observed in the direction of the neutron drip line.
Optimising sensor geometry of a photodiode based detector for the direct detection of strontium 90 in groundwater
Authors: Turkington Graeme , Gamage Kelum A.A. , Graham James 
Published: December 2020

Abstract
Strontium-90, as one of the primary beta emitting radionuclides produced during nuclear fission, strontium-90 contaminates groundwater at nuclear decommissioning sites after leaks and spills. Its presence in the groundwater presents a long-term site risk, and its activity must be routinely monitored. Existing techniques see groundwater samples collected from deep underground boreholes and sent to remote labs for analysis [1]. These procedures are expensive, time consuming and produce chemical waste, whereby eliminating the need for sample collection and treatment, the net lifetime monitoring costs of strontium 90 can be reduced [2]. In this paper authors present an optimisation of a beta detector, based on submersible photodetector, which can be used in real-time, in-situ beta detection. In order to directly detect and characterise strontium 90 in groundwater, it is essential to maximise the number of beta particles incident on the photodiode surface and ensure that they are fully absorbed within the sensitive region of the detector. This work has developed a Geant4 software framework for investigating the energy deposition by beta particles on photodiode detectors. A series of simulations have been performed to investigate radiation absorption in silicon, cadmium telluride and gallium arsenide detectors. Variations in sensitive area and detector thickness were modeled to determine their suitability for strontium-90 detection in groundwater. The optimal detector geometry of gallium arsenide photodiodes was further investigated. The simulation results and analysis suggest that the optimal detector will feature a large surface area, at least 1 cm2, and an intrinsic layer approximately 400 m thick.
Generalised gamma spectrometry simulator for problems in nuclide identification
Authors: Turner A. , Wheldon C. , Gilbert M.R. , Packer L.W. , Burns J. , Kokalova Wheldon Tz. , Freer M. 
Published: December 2020

Abstract
Improvements in Radio-Isotope IDentification (RIID) algorithms have always been a continuous research focus. However, significant developments in machine learning have recently sparked renewed interest. To provide a rapid development environment for this, a generalised gamma simulator has been built using the GEANT4 toolkit. This enables consideration of a diverse range of radiation sources and shielding scenarios. The simulator currently provides training data for the development of neural network based RIID models.
Features of titanium and aluminum particles combustion
Authors: Belousova N S , Glotov O G , Guskov A V 
Published: December 2020

Abstract
The results of the study of metal particles combustion process in free fall in air are presented. Titanium particles with a size of 120-540 microns and particles-aluminum agglomerates with a size of 540-660 microns were used. The characteristic times of the beginning and the end of fragmentation, the end of combustion were found with help of video filming. The laws of particles motion, in particular, their velocity and coordinate at the moment of the beginning of fragmentation, were determined. The size of titanium particles at which the fragmentation mode changes (“star” and “spruce branch”) were estimated. Condensed combustion products of particles were selected and investigated.
Researching acceleration and deceleration processes of supercavitating strikers under the conditions of hydroballistic track
Authors: Ischenko A N , Burkin V V , Diachkovskiy A S , Chupashev A V 
Published: December 2020

Abstract
Laboratory researches of the processes accompanying high-velocity motion of super-cavitating strikers under water, conducted under the conditions of a hydroballistic track imply the acceleration of a striker within a ballistic barrel to speeds exceeding 200 m/s and consequent partial or complete deceleration within a water tank. The results of experimental and theoretical researches concerning the acceleration and deceleration processes are considered in the given work as well as the estimation of the force and pressure values impacting the striker.
Selection of reagent ratio for hydrogen production via Al nanopowder oxidation
Authors: Morozova O N , Pavlenko A A , Antonnikova A A , Titov S S 
Published: December 2020

Abstract
In the present paper, Al is considered as a basic material for hydrogen production from water because of its high performance, availability, and environmental safety of its reaction products. Here we report the results of experimental trials on the oxidation of Alex-grade Al nanopowder by water when heated and stirred. The plots of pressure and temperature versus Al oxidation time in a high-pressure reactor are given. We show the advantages of hydrogen extraction from hydrogen-containing materials via the oxidation of metal powders. An optimum mass ratio of Al nanopowder to water at which the oxidation reaction takes place to release hydrogen has been identified by varying the reagent ratio. It can be concluded at this point of the study that it is advisable to maintain the H2O-to-Al nanopowder ratio of 11:1 for hydrogen production. Hydrogen resulted from this reaction can be used to supply small-scale power packs based on hydrogen FC.
SHS-synthesis of nanolaminate materials of the system Ti-Cr-Al-C and their term-oxidative stability
Authors: Shulpekov A M , Lepakova O K , Afanasyev N I 
Published: December 2020

Abstract
The features of SHS processes in the powder mixture Ti-Cr-Al-C are studied. It is shown that an increase in the chromium content in the mixture lowers the maximum temperature of the combustion wave front. When the chromium content in the mixture is above 20 wt. % process goes into non-stationary combustion mode. The nanolaminate phases Ti2AlC, Ti3AlC2, or their mixture are formed when the chromium content is up to 20 wt.%. Chromium is embedded in the crystal lattice of MAX phases, replacing titanium in the crystal lattice. The introduction of chromium increases the resistance of the material to oxidation. Samples of composition Ti1.1Cr0.9AlC are not inferior in oxidation resistance to materials based on Cr2AlC. However, their synthesis, in contrast to Cr2AlC, is possible in the autowave mode of SHS at room temperature. This allows them to be recommended for use in parts operating under extreme operating conditions, such as electrical contacts, bearings, heating elements, heat exchangers, as high-temperature ceramics.
The interaction of water vapor molecules with a structure based on carbon nanotubes
Authors: Tarasov E A , Khilchuk M D 
Published: December 2020

Abstract
This paper presents the results of numerical simulations of the interaction of a unit cell of a membrane composed of four open nanotubes and water vapor molecules. A mathematical model was proposed based on the Lenard-Jones potential, and a numerical solution of the equations of motion of a water vapor molecule around a carbon nanotube was constructed. This solution was implemented using the author’s program code in the FORTRAN language. The simulation results show that during the rotation of the unit cell of the membrane, it is possible to change the modes of passage of the membrane in relation to water vapor. These results can be used both in further scientific research and in the creation of various filter materials.