A5033477848- Atomic and Molecular Physics
- Ion-surface interactions and analysis
- Mass Spectrometry Techniques and Applications
- Nuclear Physics and Applications
- Particle accelerators and beam dynamics
- Nuclear physics research studies
- Electron and X-Ray Spectroscopy Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Radiation Effects and Dosimetry
- Muon and positron interactions and applications
- Radiation Detection and Scintillator Technologies
- Advanced Chemical Physics Studies
- Nanopore and Nanochannel Transport Studies
- Quantum, superfluid, helium dynamics
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Radiation Therapy and Dosimetry
- Cold Atom Physics and Bose-Einstein Condensates
- Catalytic Processes in Materials Science
- Nuclear Materials and Properties
- Gold and Silver Nanoparticles Synthesis and Applications
- Analytical Chemistry and Chromatography
- nanoparticles nucleation surface interactions
- Isotope Analysis in Ecology
- Advanced Electron Microscopy Techniques and Applications
Osaka Metropolitan University
2024-2025
RIKEN Nishina Center
2009-2024
Osaka Prefecture University
2008-2021
Tokyo University of Agriculture and Technology
2019
RIKEN
2005-2016
RIKEN Advanced Science Institute
2005-2016
Tokyo University of Science
2009-2014
Nippon Soken (Japan)
2005-2012
Sophia University
2009-2011
Tokyo University of the Arts
2009-2011
The authors have developed a method to produce microbeam of slow highly charged ions based on self-organized charge-up inside tapered glass capillary. A transmission 8keV Ar8+ beam through the capillary 5cm long with 800∕24μm inlet/outlet inner diameters was observed stably for more than 1200s. transmitted had same size as outlet density enhancement approximately 10 and divergence ±5mrad. initial guided tilted by large ±100mrad, it still kept incident charge.
We present here a cell surgery scheme involving selective inactivation or disruption of cellular structures. Energetic ions are injected into through tapered glass capillary like microinjection method. A slight but essential difference from is that thin window prepared at the outlet so no liquid material can flow in back while still allowing energetic to penetrate cell. An ∼MeV He ion beam such having 10μm diameter inactivated selected volume (∼μm3) fluorescent molecules located HeLa nucleus.
The atomic masses of ^{55}Sc, ^{56,58}Ti, and ^{56-59}V have been determined using the high-precision multireflection time-of-flight technique. radioisotopes produced at RIKEN's Radioactive Isotope Beam Factory (RIBF) delivered to novel designed gas cell system, which has recently commissioned downstream ZeroDegree spectrometer following BigRIPS separator. For ^{56,58}Ti ^{56-59}V, mass uncertainties reduced down order 10 keV, shedding new light on N=34 shell effect in Ti V isotopes by first...
Slow radioactive ion beams have been produced with an overall efficiency of 4% by thermalizing energetic ions a projectile fragment separator in He-gas cell and guiding them to vacuum vessel dc rf fields. Space charge was observed limiting effect. Since the ionization He atoms creates region high space charge, many thermalized interest are pushed toward walls gas cell. Such losses investigated for different incoming intensities.
Abstract We made a new type of collagen gel by γ-ray irradiation an acidic solution type-I collagen, and performed comparative studies on conventional the gel. The neutral gel, 0.3% (w/v) was formed at pH then irradiated γ-rays. directly from irradiation. Both types were prepared, swollen in water dried for measurement specific content. showed relatively high content shrunk moderately, depending dose, while lower clearly A three-dimensional tangled network microfibrils observed gels scanning...
Radioactive beryllium isotope ions ($^{7}\mathrm{Be}^{+}$ and $^{10}\mathrm{Be}^{+}$) that are provided by a projectile fragment separator with $\ensuremath{\approx}1\phantom{\rule{0.3em}{0ex}}\mathrm{GeV}$ beams, as well stable $(^{9}\mathrm{Be}^{+})$ stored laser cooled in an online ion trap. Their absolute transition energies of the $2s\phantom{\rule{0.2em}{0ex}}^{2}S_{1∕2}\ensuremath{\rightarrow}2p\phantom{\rule{0.2em}{0ex}}^{2}P_{3∕2}$ were measured accuracy...
The ground state hyperfine splitting of (7)Be+ has been measured by laser-microwave double-resonance spectroscopy in the online rf trap RIKEN's slow RI-beam facility. Be ions produced projectile fragmentation 13C at approximately 1 GeV were thermalized a ion guide gas cell and subsequently laser cooled to microeV. This 10(15)-fold reduction kinetic energy allows precision these ions. A magnetic hfs constant A=-742.772 28(43) MHz was for 7Be+, from which nuclear moment mu(I)=-1.399 28(2)mu(N) deduced.
Helium cluster ions 4 He n + (2≤ ≤15) have been formed in a drift tube. Information about binding energy, Δ E = - -1 , has obtained. The energy drastically decreases at =4, then gradually with increasing . Steplike changes also observed between =10 and 11 =14 15, which indicates that the sizes 14 are magic numbers. Geometrical structures of 10 discussed.
Due to the strong evolution in field of nanotechnologies and continuous miniaturisation electronic components, multiply-charged ion nanobeams would be a promising tool this research. Either for surface modification or local (nanometre scale) analysis purposes, studying feasibility such beams is interest. In present contribution, we focusing technique based on self-organised charge-up simple glass 'funnel'.
A new positron accumulation scheme compatible with ultrahigh vacuum conditions has been developed, which is realized by preparing a high density electron plasma as $\ensuremath{\approx}{10}^{11}\text{ }\text{ }{\mathrm{c}\mathrm{m}}^{\ensuremath{-}3}$ and an ion cloud energy absorbers. The present rate normalized the intensity of $^{22}\mathrm{N}\mathrm{a}$ source...
Abstract Gelatin hydrogels with various concentrations were cross-linked by the irradiation 60Co γ-rays, and we investigated radiation-induced cross-linking of gelatin estimating physical properties irradiated hydrogels. In case 1, 5, 10% (w/v) solutions, specific water content hydrogels, index showing extent depended on absorbed dose, that lower concentration decreased drastically. The breaking strength correlated to irrespective initial concentration. More than 8 kGy induced insolubility...
We have developed a method to produce nm sized slow highly-charged ion beam based on self-organized charge up inside single tapered-glass capillary. In order investigate the characteristics of obtained beams, transmission 8 keV Ar8+ through capillary 5-cm long with 800/24 μm inlet/outlet inner diameter was examined. The transmitted had same size as outlet beam-density enhancement approximately 10. initial guided tilted by large ±100 mrad and it still kept incident charge. A focused Ga+...
This paper presents a new technique for synthesizing silver nanoparticles immobilized on textile fabrics using radiochemical process. In this process, the irradiation of high-energy electron beam an aqueous solution containing ions induces reducing reaction that forms metallic nanoparticles. Small Ag particles about 2–4 nm were observed together with relatively large more than 10 nm. These are firmly surface support fabric without need any binder or surfactant. The amount was found to depend...
Photoion spectrometry has been applied to determine the relative photoionization yields of Ba+ ions around 4d ionization threshold. A ground state ion beam was merged with monochromatized synchrotron radiation over a length 15 cm. Counting number doubly and triply charged produced in interaction region, we have obtained partial photoion as function photon energy. Prominent peaks due resonance Auger processes observed below giant structure above threshold seen only for Ba3+ spectrum.
Using a photon - ion merged-beam technique, we measured the relative yield spectra of and ions created by photoionization as function energy in 4d ionization region. The production, i.e. double-electron process is found to be dominant throughout range investigated. A broad structure excitation around 100 eV was observed spectrum. spectral shoulder for at 85 eV, which absent neutral Xe. Some discrete lines were both -yield below 75 eV. experimental analysed multiconfiguration Dirac Fock...