Susann Schmidt
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View article: Comparative Study of Zirconium Nitride Multilayer Coatings: Crystallinity, In Vitro Oxidation Behaviour and Tribological Properties Deposited via Sputtering and Arc Deposition
Comparative Study of Zirconium Nitride Multilayer Coatings: Crystallinity, In Vitro Oxidation Behaviour and Tribological Properties Deposited via Sputtering and Arc Deposition Open
This study aims to evaluate and compare the properties of a biomedical clinically established zirconium nitride (ZrN) multilayer coating prepared using two different techniques: pulsed magnetron sputtering and cathodic arc deposition. The …
View article: Search for two-neutrino double-beta decay of <sup>136</sup>Xe to the excited state of <sup>136</sup>Ba with the complete EXO-200 dataset*
Search for two-neutrino double-beta decay of <sup>136</sup>Xe to the excited state of <sup>136</sup>Ba with the complete EXO-200 dataset* Open
A new search for two-neutrino double-beta (2 νββ ) decay of 136 Xe to the excited state of 136 Ba is performed with the full EXO-200 dataset. A deep learning-based convolutional neural network is used to discriminate signal from background…
View article: Generative adversarial networks for scintillation signal simulation in EXO-200
Generative adversarial networks for scintillation signal simulation in EXO-200 Open
Generative Adversarial Networks trained on samples of simulated or actual events have been proposed as a way of generating large simulated datasets at a reduced computational cost. In this work, a novel approach to perform the simulation o…
View article: Search for Two-neutrino Double-Beta Decay of $^{136}\rm Xe$ to the $0^+_1$ excited state of $^{136}\rm Ba$ with the Complete EXO-200 Dataset
Search for Two-neutrino Double-Beta Decay of $^{136}\rm Xe$ to the $0^+_1$ excited state of $^{136}\rm Ba$ with the Complete EXO-200 Dataset Open
A new search for two-neutrino double-beta ($2νββ$) decay of $^{136}\rm Xe$ to the $0^+_1$ excited state of $^{136}\rm Ba$ is performed with the full EXO-200 dataset. A deep learning-based convolutional neural network is used to discriminat…
View article: Search for MeV electron recoils from dark matter in EXO-200
Search for MeV electron recoils from dark matter in EXO-200 Open
We present a search for electron-recoil signatures from the charged-current absorption of fermionic dark matter using the EXO-200 detector. We report an average electron-recoil background rate of 6.8 × 104 cts kg–1 yr–1 keV–1 above 4 MeV a…
View article: Search for Majoron-emitting modes of $^{136}$Xe double beta decay with the complete EXO-200 dataset
Search for Majoron-emitting modes of $^{136}$Xe double beta decay with the complete EXO-200 dataset Open
A search for Majoron-emitting modes of the neutrinoless double-beta decay of ¹³⁶Xe is performed with the full EXO-200 dataset. This dataset consists of a total ¹³⁶Xe exposure of 234.1 kg⋅yr, and includes data with detector upgrades that ha…
View article: Measurement of the scintillation and ionization response of liquid xenon at MeV energies in the EXO-200 experiment
Measurement of the scintillation and ionization response of liquid xenon at MeV energies in the EXO-200 experiment Open
In this work, liquid xenon (LXe) is employed in a number of current and future detectors for rare event searches. We use the EXO-200 experimental data to measure the absolute scintillation and ionization yields generated by γ interactions …
View article: Multilayer <sup>10</sup>B-RPC neutron imaging detector
Multilayer <sup>10</sup>B-RPC neutron imaging detector Open
Resistive plate chambers (RPC) lined with $^{10}B_{4}$C neutron converters is\na promising cost effective technology for position-sensitive thermal neutron\ndetection capable to outperform $^{3}$He-based detectors in terms of spatial\nreso…
View article: Characterization of boron-coated silicon sensors for thermal neutron detection
Characterization of boron-coated silicon sensors for thermal neutron detection Open
Silicon neutron detectors can operate at low voltage and come with ease of fabrication and the possibility of integration of readout electronics and thus are attractive from an application point of view. In this paper, we have studied ther…
View article: The Effect of N, C, Cr, and Nb Content on Silicon Nitride Coatings for Joint Applications
The Effect of N, C, Cr, and Nb Content on Silicon Nitride Coatings for Joint Applications Open
Ceramic coatings deposited on orthopedic implants are an alternative to achieve and maintain high wear resistance of the metallic device, and simultaneously allow for a reduction in metal ion release. Silicon nitride based (SiNx) coatings …
View article: The Effect of Coating Density on Functional Properties of SiNx Coated Implants
The Effect of Coating Density on Functional Properties of SiNx Coated Implants Open
Ceramic coatings may be applied onto metallic components of joint replacements for improved wear and corrosion resistance as well as enhanced biocompatibility, especially for metal-sensitive patients. Silicon nitride (SiNx) coatings have r…
View article: Towards Functional Silicon Nitride Coatings for Joint Replacements
Towards Functional Silicon Nitride Coatings for Joint Replacements Open
Silicon nitride (SiNx) coatings are currently under investigation as bearing surfaces for joint implants, due to their low wear rate and the good biocompatibility of both coatings and their potential wear debris. The aim of this study was …
View article: Large High-Efficiency Thermal Neutron Detectors Based on the Micromegas Technology
Large High-Efficiency Thermal Neutron Detectors Based on the Micromegas Technology Open
Due to the so-called 3He shortage crisis, many detection techniques for thermal neutrons are currently based on alternative converters. There are several possible ways of increasing the detection efficiency for thermal neutrons using the s…
View article: Neutron reflectometry with the Multi-Blade <sup>10</sup> B-based detector
Neutron reflectometry with the Multi-Blade <sup>10</sup> B-based detector Open
The Multi-Blade is a boron-10-based gaseous detector developed for neutron reflectometry instruments at the European Spallation Source in Sweden. The main challenges for neutron reflectometry detectors are the instantaneous counting rate a…
View article: Microstructure and thermoelectric properties of CrN and CrN/Cr<sub>2</sub>N thin films
Microstructure and thermoelectric properties of CrN and CrN/Cr<sub>2</sub>N thin films Open
CrN thin films with an N/Cr ratio of 95% were deposited by reactive magnetron sputtering onto (0001) sapphire substrates. X-ray diffraction and pole figure texture analysis show CrN (111) epitaxial growth in a twin domain fashion. By chang…
View article: Search for nucleon decays with EXO-200
Search for nucleon decays with EXO-200 Open
A search for instability of nucleons bound in Xe136 nuclei is reported with 223 kg·yr exposure of Xe136 in the EXO-200 experiment. Lifetime limits of 3.3×1023 and 1.9×1023 yr are established for nucleon decay to Sb133 and Te133, respective…
View article: Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector
Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector Open
Results from a search for neutrinoless double-beta decay (0νββ) of ^{136}Xe are presented using the first year of data taken with the upgraded EXO-200 detector. Relative to previous searches by EXO-200, the energy resolution of the detecto…
View article: Plasma CVD of hydrogenated boron-carbon thin films from triethylboron
Plasma CVD of hydrogenated boron-carbon thin films from triethylboron Open
Low-temperature chemical vapor deposition (CVD) of B—C thin films is of importance for neutron voltaics and semiconductor technology. The highly reactive trialkylboranes, with alkyl groups of 1-4 carbon atoms, are a class of precursors tha…
View article: Performance of the high-efficiency thermal neutron BAND-GEM detector
Performance of the high-efficiency thermal neutron BAND-GEM detector Open
Newhigh-count-rate detectors are required for future spallation neutron sources where large-area and high-efficiency (>50%) detectors are envisaged. In this framework, Gas Electron Multiplier (GEM) is one of the detector technologies being…
View article: Morphology and adhesion of silicon nitride coatings upon soaking in fetal bovine serum
Morphology and adhesion of silicon nitride coatings upon soaking in fetal bovine serum Open
Total hip joint replacements are considered successful in providing patients with close- to-normal lives; however, revision surgeries still represent an individual and socioeconomic burden due to wear and failure of the implants, which occ…
View article: Gas Phase Chemistry of Trimethylboron in Thermal Chemical Vapor Deposition
Gas Phase Chemistry of Trimethylboron in Thermal Chemical Vapor Deposition Open
Alkylboranes, such as trimethylboron (TMB) and triethylboron (TEB), are promising alternative precursors in low temperature chemical vapor deposition (CVD) of boron-containing thin films. In this study, CVD growth of B-C films using TMB an…
View article: Reduction of the thermal conductivity of the thermoelectric material ScN by Nb alloying
Reduction of the thermal conductivity of the thermoelectric material ScN by Nb alloying Open
ScN-rich (Sc,Nb)N solid solution thin films have been studied, motivated by the promising thermoelectric properties of ScN-based materials. Cubic Sc1-xNbxN films for 0 ≤ x ≤ 0.25 were epitaxially grown by DC reactive magnetron sputtering o…
View article: SiNx coatings deposited by reactive high power impulse magnetron sputtering: Process parameters influencing the residual coating stress
SiNx coatings deposited by reactive high power impulse magnetron sputtering: Process parameters influencing the residual coating stress Open
The residual coating stress and its control is of key importance for the performance and reliability of silicon nitride (SiNx) coatings for biomedical applications. This study explores the most important deposition process parameters to ta…
View article: Influence of Substrate Heating and Nitrogen Flow on the Composition, Morphological and Mechanical Properties of SiNx Coatings Aimed for Joint Replacements
Influence of Substrate Heating and Nitrogen Flow on the Composition, Morphological and Mechanical Properties of SiNx Coatings Aimed for Joint Replacements Open
Silicon nitride (SiNx) coatings are promising for joint replacement applications due to their high wear resistance and biocompatibility. For such coatings, a higher nitrogen content, obtained through an increased nitrogen gas supply, has b…
View article: Tuning the Emission Energy of Chemically Doped Graphene Quantum Dots
Tuning the Emission Energy of Chemically Doped Graphene Quantum Dots Open
Tuning the emission energy of graphene quantum dots (GQDs) and understanding the reason of tunability is essential for the GOD function in optoelectronic devices. Besides material-based challenges, the way to realize chemical doping and ba…
View article: Trimethylboron as Single-Source Precursor for Boron–Carbon Thin Film Synthesis by Plasma Chemical Vapor Deposition
Trimethylboron as Single-Source Precursor for Boron–Carbon Thin Film Synthesis by Plasma Chemical Vapor Deposition Open
Boron–carbon (BxC) thin films are potential neutron converting layers for 10B-based neutron detectors. However, as common material choices for such detectors do not tolerate temperatures above 500 °C, a low temperature deposition route is …
View article: SiN<sub><i>x</i></sub> Coatings Deposited by Reactive High Power Impulse Magnetron Sputtering: Process Parameters Influencing the Nitrogen Content
SiN<sub><i>x</i></sub> Coatings Deposited by Reactive High Power Impulse Magnetron Sputtering: Process Parameters Influencing the Nitrogen Content Open
Reactive high power impulse magnetron sputtering (rHiPIMS) was used to deposit silicon nitride (SiNx) coatings for biomedical applications. The SiNx growth and plasma characterization were conducted in an industrial coater, using Si target…
View article: First measurements with new high-resolution gadolinium-GEM neutron detectors
First measurements with new high-resolution gadolinium-GEM neutron detectors Open
European Spallation Source instruments like the macromolecular\ndiffractometer, NMX, require an excellent neutron detection efficiency,\nhigh-rate capabilities, time resolution, and an unprecedented spatial\nresolution in the order of a fe…