A5033044898- Muon and positron interactions and applications
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Atomic and Molecular Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Radiation Therapy and Dosimetry
- Particle accelerators and beam dynamics
- Atomic and Subatomic Physics Research
- Luminescence Properties of Advanced Materials
- Glass properties and applications
- Particle physics theoretical and experimental studies
- Nuclear Physics and Applications
- Quantum Chromodynamics and Particle Interactions
- Medical Imaging Techniques and Applications
- Metallurgy and Cultural Artifacts
- Digital Radiography and Breast Imaging
- Paleopathology and ancient diseases
- Advanced Radiotherapy Techniques
- Ancient and Medieval Archaeology Studies
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Radiation Effects and Dosimetry
- Image Processing and 3D Reconstruction
- Scientific Measurement and Uncertainty Evaluation
- Optical Systems and Laser Technology
Suranaree University of Technology
2014-2024
Paul Scherrer Institute
2018-2023
ETH Zurich
2018-2023
Institute of Particle Physics
2020
Muonic atom spectroscopy-the measurement of the x rays emitted during formation process a muonic atom-has long standing history in probing shape and size nuclei. In fact, almost all stable elements have been subject to spectroscopy measurements absolute charge radii extracted from these typically offer highest accuracy available. However, so far only targets at least few hundred milligram could be used as it required stop muon beam directly target form atom. We developed new method relying...
The hyperfine splitting of the 5g→4f transitions in muonic 185,187Re has been measured using high resolution purity germanium detectors and compared to state-of-the-art atomic theoretical predictions. spectroscopic quadrupole moment extracted modern fitting procedures values available literature obtained from x rays natural rhenium. nuclear are 2.07(5) b 1.94(5) b, respectively for 185Re 187Re.1 MoreReceived 27 November 2019Accepted 21 February...
We demonstrate efficient transverse compression of a 12.5 MeV/c muon beam stopped in helium gas target featuring vertical density gradient and crossed electric magnetic fields. The stop distribution extending vertically over 14 mm was reduced to 0.25 size (rms) within 3.5 μs. simulation including cross sections for low-energy μ^{+}-He elastic charge exchange (μ^{+}↔ muonium) collisions describes the measurements well. By combining stage with previously demonstrated longitudinal stage, we can...
The usage of muonic x-rays to study elemental properties like nuclear radii ranges back the seventies. This triggered pioneering work at Paul Scherrer Institute (PSI), during eighties on Muon-induced x-ray emission (MIXE) technique for a non-destructive assessment compositions. In recent years, this method has seen rebirth, improvement, and adoption most muon facilities around world. Hereby, PSI offers unique capabilities with its high-rate continuous beam Swiss Muon Source (SμS). We report...
A search for artefacts made of meteoritic iron has been performed in archaeological collections the greater area Lake Biel, Switzerland. single object identified, an arrowhead with a mass 2.9 g found 19th Century late Bronze Age (900–800 BCE) lake dwelling Mörigen, The origin is definitely proven by combining methods extended and newly applied to artefact. Elemental composition (7.10–8.28 wt% Ni, 0.58–0.86 Co, ∼300 ppm Ge), primary mineralogy consisting associated Ni-poor Ni-rich phases...
The toolbox for material characterization has never been richer than today. Great progress with all kinds of particles and interaction methods provide access to nearly properties an object under study. However, a tomographic analysis the subsurface region remains still challenge In this regard, Muon Induced X-ray Emission (MIXE) technique seen rebirth fueled by availability high intensity muon beams. We report here study conducted at Paul Scherrer Institute (PSI). It demonstrates that...
A novel device to compress the phase space of a muon beam by factor $$10^{10}$$ with $$10^{-3}$$ efficiency is under development. surface stopped in helium gas target consisting several compression stages, wherein strong electric and magnetic fields are applied. The spatial extent swarm decreased means these until muons eV energy extracted into vacuum through small orifice. It was observed that 20 cm long stop distribution can be compressed longitudinal direction sub-mm within $$2~\upmu...
Muonic atoms have been used to extract the most accurate nuclear charge radii based on detection of X-rays from muonic cascades. Most stable and a few unstable isotopes investigated with atom spectroscopy techniques. A new research project recently started at Paul Scherrer Institut aims extend highresolution for precise determination other structure properties radioactive isotopes. The challenge combine high-energy muon beam small quantity stopping mass is being addressed by developing...
The muX project at the Paul Scherrer Institut aims to perform high-resolution muonic atom X-ray spectroscopy for extraction of nuclear charge radii radioactive isotopes that can be handled only in microgram quantities. Measurements absolute high-Z elements are complementary measurements relative differences mean-square along isotopic chain available from laser spectroscopy. One major limitations atomic structure calculations is related with uncertainty radius. This case Weinberg angle parity...
Permutation groups are applied to analyze the symmetries of multiquark systems and wave functions pentaquark states constructed systematically in language Yamanouchi basis. We estimate mass baryons constituent quark model with one-gluon-exchange interaction, assuming that consist q 3 component as well [Formula: see text] component.
In this work, the standard CsI(Tl) scintillator was used to determine characteristics of a proton beam. By irradiating with beam, it able subsequently measure emitted light using spectrometer. This work presents dose response and its use depth-dose profile The measurement showed that emission depended on total For design measurement, setup water phantom included tank. determined through varying depth at various positions along path beam until end Bragg peak region. To compare measured...
The melt‐quenching technique is used to fabricate calcium sodium aluminum borate glasses (Sm: ANCB) doped with varying concentrations of Sm 3+ ions. Characteristics ANCBSm glasses, including density, molar volume, refractive index, absorption, emission (via visible light, X‐ray, and proton excitation), decay time, CIE color coordinates, are analyzed. index glass increased 2 O 3 concentration. ions enabled photon absorption in both NIR regions, a strong reddish‐orange at 600 nm due the 6 H...
<title>Abstract</title> Muonic atom spectroscopy is a method that can determine absolute nuclear charge radii with typical relative precision of 10-3. Recent developments have enabled to extend muonic microscopic target quantities as low 5 µg. This substantial reduction from the traditional limit order 100 mg based on transfer mechanism in high-pressure hydrogen gas cell, which transports muon surface material rather than stopping it over broad depth range. approach enables measurement...
Abstract The first proton therapy system in Thailand has been installed at King Chulalongkorn Memorial Hospital (KCMH) since 2019. Apart from its clinical usage, Suranaree University of Technology (SUT) initiated the collaborative research work with KCMH to explore a possibility developing computed tomography (pCT) prototype. Due proton’s depth-dose properties, this technique is more effective than photon treatment. Prior therapy, pCT could help treatment planning. This simplifies...
A low-emittance, high-intensity atomic beam of muonium ($\mathrm{M}=\mu^+ + \mathrm{e}^-$) using superfluid helium as muon-to-muonium converter is being developed at the Paul Scherrer Institute (PSI). This could advance laser spectroscopy and allow first interferometry experiments for direct observation M gravitational interaction. In this paper, we describe development compact detection schemes which resulted in background-suppressed vacuum, can be adapted cryogenic measurements. Using...
A search for artefacts made of meteoritic iron has been performed in archaeological collections the greater area Lake Biel, Switzerland. single object identified, an arrowhead with a mass 2.9 g found 19th Century late Bronze age (900-800 BC) lake dwelling Mörigen, The origin is definitely proven by elemental composition (Ni: 7.10-8.28 wt.%, Co: 0.58-0.86 Ge: ~300 ppm), primary mineralogy consisting associated Ni-poor and Ni-rich phases kamacite (6.7 wt.% Ni) taenite (33.3 Ni), presence...