Institution
National Institutes for Quantum Science and Technology
Recent research
- Physics & SpaceOpen access
The advent of free-electron lasers has enabled in-situ small-angle X-ray scattering (SAXS) measurements of laser-produced high-energy-density plasma at solid density, with nanometer- and femtosecond-scale resolution. Such plasmas generally exhibit gentle density gradients, which...
- Materials & EnergyOpen access
Ten-second electron-spin coherence in isotopically engineered diamond
Abstract Solid-state spin defects are a promising platform for quantum networks. A key requirement is to combine long ground-state spin-coherence times with a coherent optical transition for spin-photon entanglement. Here, we investigate the spin and optical coherence of single n...
- BiologyOpen access
Neural Correlates of Apathy in Multiple System Atrophy: A Clinical and Perfusion Imaging Study
BACKGROUND: Apathy is a frequent nonmotor symptom of multiple system atrophy (MSA) that worsens quality of life. Although frontostriatal dysfunction has been implicated in apathy, its neural basis in MSA remains insufficiently characterized. OBJECTIVES: To identify the neural sub...
- Health & Medicine
Estimation of global population-weighted annual eye lens dose from cosmic ray exposure.
This study presents the application of an analytical model, PARMA, to estimate the population-weighted annual absorbed dose to the lens of the eye due to cosmic rays. Cosmic ray flux data incorporating geographical altitude, together with the global population data from 2020, wer...
- Climate & EnvironmentOpen access
Abstract Urban soil contamination is primarily associated with human activities, especially industrial by-products, which have introduced high concentrations of heavy metal(loid)s from diverse sources over centuries of city development. This study investigated the distribution of...
- Biology
Impact of Intercalators on the Properties of DNA Analyzed by Molecular Dynamics Simulations
Abstract Intercalation of small molecules between DNA base pairs affects DNA conformation, disrupting essential cellular processes, including replication, transcription, and repair. We investigated conformational changes in 18-mer DNA upon intercalation of doxorubicin, SYBR Gold,...
- BiologyOpen access
Depth-resolved dose estimation in cellulose via pyrolysis for low-energy electron-beam processing
Abstract We propose a new method for estimating dose distribution in cellulose-based materials exposed to electron beams. The technique leverages the dose-dependent pyrolysis behavior of cellulose to directly quantify the absorbed dose. Using this method, we successfully estimate...
- Materials & Energy
Characterization and visualization of electronically excited states are essential for understanding photophysical and photochemical processes in condensed molecular systems. Here, we present a procedure to reconstruct the total transition density matrix (TDM) using the fragment m...
- Climate & EnvironmentOpen access
Analysis of molten particles from the Moto-Ujina Beach, Hiroshima
Abstract Color-sorted spherical molten particles extracted from Moto-Ujina Beach sand were analyzed by inductively coupled plasma–mass spectrometry, thermal ionization mass spectrometry, micro-PIXE analysis to obtain the elemental concentrations, 235 U/ 238 U isotope ratios, and...
- Materials & EnergyOpen access
Building a Physics-Aware AI Ecosystem for Solid-State Hydrogen Storage Materials
Abstract Hydrogen storage remains a central bottleneck for scalable hydrogen energy systems due to the multiscale and coupled nature of the thermodynamics, kinetics, and microstructural evolution of hydrogen storage materials (HSMs). Although artificial intelligence (AI) has acce...
- Materials & Energy
ABSTRACT To gain insights into single‐atom active sites of iron, nitrogen‐doped carbon (Fe‐N‐C), we performed comprehensive element‐specific spectroscopies including Fe K ‐edge X‐ray absorption, 57 Fe Mössbauer, and Fe Kβ 1,3 and valence‐to‐core (VtC) X‐ray emission spectroscopy...