jerome-white/leaderboard-documents-musr dataset hosted on Hugging Face and contributed by the HF Datasets community

Our previous experiment (RB910492) aimed to determine reaction rate constants for muon with Vitamins C and E, thus providing a measure of their relative antioxidant capacities. While we were able to successfully measure the rate of muonium addition to Vitamin C, our attempts to measure the reaction kinetics of Vitamin E were thwarted with difficulties relating to oxygen contamination, systematically introduced in the sample loading procedure. Since this time, there have been significant improvements in the handling of liquid samples and we now request beamtime to complete the work on Vitamin E. This comprises of a study to investigate the final state species resulting from the reaction of muonium with Vitamin E as well as time to complete our kinetics study.

LFrancis/MuSR-NoOp-Plus dataset hosted on Hugging Face and contributed by the HF Datasets community

We propose a set of RF measurements on Silicon Carbide (polytype 6H) to identify and characterize the muonium species present below room temperature. One of the main goals of characterizing muonium with this experiment is to provide data that is essential to the analysis and interpretation of our recent experiment (RB1910567) where we used the laser system on HIFI to directly ionize Mu centers in an effort to directly measure the muonium impurity levels. In semiconductors, isolated hydrogen is electrically active and unavoidable in both material production and use. The high reactivity of H makes it a very interesting impurity but also very difficult to study. Muons have been very successful in functioning as an experimentally accessible analogue to isolated H impurities in materials. The proposed measurements will also add valuable information to the understanding of H impurities in SiC

Dataset Card for Evaluation run of Youlln/ECE-PRYMMAL-0.5B-FT-V4-MUSR

Dataset automatically created during the evaluation run of model Youlln/ECE-PRYMMAL-0.5B-FT-V4-MUSR The dataset is composed of 38 configuration(s), each one corresponding to one of the evaluated task. The dataset has been created from 1 run(s). Each run can be found as a specific split in each configuration, the split being named using the timestamp of the run.The "train" split is always pointing to the latest… See the full description on the dataset page: https://huggingface.co/datasets/open-llm-leaderboard/Youlln_ECE-PRYMMAL-0.5B-FT-V4-MUSR-details.

This data set presents the measured pulse spectra of five pieces of Chinese muSR detectors which are made of plastic scintillators (size: 10*10*50 mm³). The derivatives and related plots are also listed in the file.

The aim of the experiment is to study, in low magnetic fields, the very slow spin fluctuation (MHz range) present in the normal phase of La0.8Y0.2LaFe1-xMnxAsO0.89F0.11 superconductors detected by 19F nuclear magnetic resonance spin-lattice relaxation time (1/T1). LF muSR measurements should confirm that the already observed enhancement of ZFmuSR relaxation is indeed due presence of the low frequency fluctuations.

The main spectroscopic technique for studying radicals in solids and liquids, ESR, cannot usually be used to study radicals of more than 3-5 atoms in the gas phase due to strong coupling between the spin, rotational, and orbital angular momenta. Muon spin rotation/relaxation/resonance (MuSR) does not suffer from this problem, potentially making it superior for gas phase measurements. We are attemping to demonstrate RF MuSR as a new tool for measuring organic radicals in the gas phase, opening up the possibility of measuring muon hyperfine couplings in the dilute limit and bringing the potential for final state spectroscopy and kinetics measurements on gas systems. This is a proposal to search for the radical states formed on muon implantation in ethene and isobutene using the high field spectrometer, HiFi.

Nearly all polymers form glasses and the glass transition at temperature Tg dominates many physical properties of polymers that are relevant for their applications. The most detailed previous muon studies of polymer glasses have been made in TF mode using diamagnetic muon probe states. This works particularly well in low Tg systems for probing Tg near the surface of thin films using low energy muons. If Tg approaches or exceeds room temperature then fast diffusion of unbound diamagnetic muons forces a switch to bound paramagnetic muon probe states. LF muSR techniques will be developed here for polymer glass studies using the relaxation of the paramagnetic muons at both low LF and at ALC resonance points to probe the dynamical state of the polymer. The studies will focus on two polymers, the biocompatible polymer poly(L-lactide) (Tg=335K) and the low Tg polymer polybutadiene (Tg=170K)

Due to a strong competition between other groups doing muSR study, we are submitting this proposal as a Rapid proposal. Recently, Wang et al. found the first nitrogen-containing superconductor ThFeAsN with Tc=30K. This new superconductor belongs to the 1111 family of FeAs-based superconductors. The aim of the proposed experiment is to use muSR to investigate the nature of superconducting state of ThFeAsN and to further explore the normal state properties, which will be of interest for ongoing research in the field of Fe-based superconductivity. µSR studies are important for investigating the microscopic field distribution inside a superconductor. Furthermore, µSR studies will provide direct information about the pairing symmetry or symmetry of the order parameter and gap structure in ThFeAsN, which is important for understanding the multiband superconductivity in Fe-based systems.

Dataset Card for Evaluation run of matouLeLoup/ECE-PRYMMAL-0.5B-FT-V4-MUSR-Mathis

Dataset automatically created during the evaluation run of model matouLeLoup/ECE-PRYMMAL-0.5B-FT-V4-MUSR-Mathis The dataset is composed of 38 configuration(s), each one corresponding to one of the evaluated task. The dataset has been created from 5 run(s). Each run can be found as a specific split in each configuration, the split being named using the timestamp of the run.The "train" split is always… See the full description on the dataset page: https://huggingface.co/datasets/open-llm-leaderboard/matouLeLoup_ECE-PRYMMAL-0.5B-FT-V4-MUSR-Mathis-details.

After the discovery of multiband superconductivity in MgB2 (Tc = 39.7 K) a number of studies have been made to understand the origin of superconductivity in this compound as well as related compounds. Crystal structure plays an important role in the origin of multiband superconductivity. Recently reported superconductor MgPtSi with orthorhombic honeycomb structure exhibits superconducting transition at Tc = 2.5 K. MgPtSi is a type II superconductor with upper critical field 6.3 kOe and coherence length 230 Å. Upward curvature of Hc2 near TC suggests multiband/multigap superconductivity, which needs further clarification. In this proposal we want to study zero field and transverse field muon spin rotation/relaxation to investigate superconducting properties of MgPtSi using MuSR spectrometer.

Having established the carrier lifetime spectroscopy in intrinsic Si with the photo-MuSR method in our previous beam times, we recently found its sensitivity for both bulk and surface recombination rate. This is a very unique and important feature because there is no other lifetime spectroscopy technique that can measure both of them independently from a single measurement. To further develop and investigate this method, we need to change the muon implantation depth to obtain a clearer picture of carrier dynamics and more accurate fitting. The wafer surface may be passivated for lower surface velocity to compare the carrier dynamics with an as-received wafer.

Unveiling quantum effects in materials at low temperatures, such as quantum spin-liquid behavior, have been a central task in condensed matter physics. A two-dimensional kagome antiferromagnet can achieve a spin-liquid ground state due to strong quantum fluctuations and geometrical frustrations, but the topological nature of its ground state and low-energy spin fluctuationsare still controversial. Recently, we have successfully synthesized polycrystalline of Cu3Zn(OH)6FBr with the barlowite type crystal structure. Our specific heat measurements show that there is no phase transition down to 50 mK in Cu3Zn(OH)6FBr and hence provides a unique opportunity to investigate spin-liquid ground state in this compound down to 50 mK using muon spin rotation and relaxation measurements. We would also measure Cu4(OH)6FBr, which exhibits an antiferromagnetic ordering at 15 K for a comparison.

Advanced health informatics is a grand challenge for 21st century medicine. The aim is to develop devices to enhance personalised healthcare. Part of such devices is selecting materials that can interface between biology and computers, i.e. bioelectronics. One promising material is the skin pigment melanin, since it is bio-compatible and sustains electrical current. Recently we performed a series of electrical measurements on melanin that apparently confirms the dominance of redox chemistry in driving its electrical current. However, we need to confirm our observations with an independent technique. Muon spin resonance provides the ideal alternative. The key objective is to obtain (as a function of hydration, chemical energy and temperature) muon relaxation rate behaviour and correlate it to our result. This should then open the muSR technique to a new user base in bioelectronics.

We propose muSR study on magnetic properties of an organic charge transfer complex on a 2D triangular lattice, (C2H5)2(CH3)2Sb[Pd(dmit)2]2. This system has been known to exhibit charge separation forming spin-singlet below 70 K from the result of an X-ray analysis for the last decade. Our previous muSR result also revealed formation of the spin-singlet state. However, the transition temperature observed in the muSR was higher than that obtained from the X-ray analysis. Very recently, a new incommensurate phase has been found at the temperatures from 80 to 105 K, where competition between charge, spin and structural order exists, in a high-resolution X-ray diffraction measurement. The transition temperature of 105 K consists with the previous muSR result, but we have only poor data points under ZF. We will investigate magnetic state and dynamics in the newly discovered phase in detail.

We have been recently successful in isolating the fcc polymorph of the key hyperexpanded fulleride Cs3C60 - this phase can be driven to a bulk suprconducting state without symmetry change by the application of pressure. Its Tc passes through a maximum of 34 K at ca. 6 kbar. With this proposal, we want to address the nature of the electronic states of the fcc Cs3C60 phase at ambient pressure and search for the onset of long range antiferromagntic order by using the muSR technique in its ZF/LF/TF variants.

Recently we have found multiferroic-like properties in an S=1/2 Cu2+ quantum-spin triangular-lattice compound CuOHCl. It showed geometric frustration and antiferromagnetic transition at TN = 11 K, but with an anomaly followed below 5 K. An extensive study on this new compound has suggested a multiferroic transition at 5 K. Therefore, establishing such a new triangular-lattice multiferroic system is of great current interest. Therefore, we propose muSR experiments on single crystals. The single crystal muSR would enable us to uncover the the mechanism of the newly found multiferroicity in an interesting material system.

Zeolites are microporous materials that are used as heterogeneous acid catalysts in reactions. It is important to study reactive intermediates in zeolites in order to understand the catalytic reactions in these important materials. Avoided Level Crossing muon Spin Resonance will be used to characterize pyridine radicals in zeolites with the variation of Si/Al ratio and with temperature. The silica to aluminium ratio (Si/Al) of ZSM-5 should determine the number of available Brønsted acid sites that may interact with pyridine molecules. This experiment tries to answer an open question regarding how sensitive is MuSR spectroscopy to the chemistry of the acid sites in the most widely employed acid catalysts. Understanding acidity in zeolites is still an open discussion among the zeolite community and we believe our approach will shed light on the structure of acidity.

The crystal structure of R2T(Ni,Co)Si3 consists of hexagonal layers of rare-earth atoms and randomly distributed T-Si arranged alternately along hexagonal c-axis. Magnetic frustration in these types of compounds arise primarily due to competing exchange interactions and random distribution of T/Si. Such variations of the local environment among the rare earth ions are conducive of coexistence of magnetically different phases having spatial limitations in an otherwise crystallographically single phase compound. On the basis of physical characterization, it is found that the ground state magnetic interactions in these compounds are quite complex. MuSR measurements is an ideal probe to investigate the nature of local magnetism. Here we propose to investigate the local ferromagnetic and antiferromagnetic coupling in R2T(Ni,Co)Si3 compounds through MuSR measurements at different temperatures.