A5062835736- Spectroscopy and Laser Applications
- Quantum, superfluid, helium dynamics
- Advanced Chemical Physics Studies
- Atomic and Subatomic Physics Research
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Spectroscopy and Quantum Chemical Studies
- Fluid Dynamics and Mixing
- Atmospheric chemistry and aerosols
- Cold Atom Physics and Bose-Einstein Condensates
- Japanese History and Culture
- Laser-Matter Interactions and Applications
- Molecular Spectroscopy and Structure
- Atomic and Molecular Physics
- Fluid Dynamics and Heat Transfer
- Neutrino Physics Research
- Quantum optics and atomic interactions
- Advanced NMR Techniques and Applications
- Chinese history and philosophy
- Crystallography and Radiation Phenomena
- X-ray Spectroscopy and Fluorescence Analysis
- Vietnamese History and Culture Studies
- Advanced Fiber Laser Technologies
- Nuclear Physics and Applications
- Innovative Microfluidic and Catalytic Techniques Innovation
Okayama University
2013-2025
University of British Columbia
2007-2025
Okayama University of Science
2017-2024
Tokyo Institute of Technology
2017-2023
Resonac (Japan)
2023
DIC (Japan)
2023
Aichi Institute of Technology
2018-2022
DePaul University
2015-2021
Shiga University of Medical Science
2016
Kyoto Institute of Technology
2003-2016
Abstract. Column-averaged dry air mole fractions of carbon dioxide (XCO2) retrieved from Greenhouse gases Observing SATellite (GOSAT) Short-Wavelength InfraRed (SWIR) observations were validated with aircraft measurements by the Comprehensive Observation Network for TRace AIrLiner (CONTRAIL) project, National Oceanic and Atmospheric Administration (NOAA), US Department Energy (DOE), Institute Environmental Studies (NIES), HIAPER Pole-to-Pole Observations (HIPPO) program, GOSAT validation...
The production of enriched para-H(2) is useful for many scientific applications, but the technology producing and measuring not yet widespread. In this note in accompanying auxiliary material, we describe design, construction, use a versatile standalone converter that capable enrichments up to > or = 99.99% at continuous flow rates 0.4 SLM. We also discuss storage back conversion rates, improvements three techniques (thermal conductance, NMR, solid hydrogen impurity spectroscopy) used...
Tsaoling landslide is the largest and best documented among several large landslides induced by 1999 Taiwan Chi-Chi earthquake. Pliocene sedimentary rocks of about 125 Mm3 in volume slid along very flat bedding planes dipping 14° with an average speed 35–40 m/s for 1650 m, before hitting bank Chinshui River during landslide. Detailed analysis DTMs after earthquake using a GIS software leads to accurate determination locations centroids mass, revealing horizontal vertical displacements 2524 m...
Abstract. Aircraft measurements of carbon dioxide and methane over Tsukuba (36.05° N, 140.12° E) (February 2010) Moshiri (44.36° 142.26° (August 2009) were made to calibrate ground-based high-resolution Fourier Transform Spectrometers (g-b FTSs) compare with the Greenhouse gases Observing SATellite (GOSAT). The aircraft in February 2010 successful synchronizing both g-b FTS GOSAT for first time. Airborne situ flask-sampling instruments mounted on aircraft, carried out between altitudes 0.5 7...
We systematically investigate the new experimental method of using atoms or molecules to measure important parameters neutrinos that are still be determined: absolute mass scale, hierarchy pattern (normal inverted), neutrino type (Majorana Dirac), and CP-violating phases, including Majorana phases. Most these observables difficult in oscillation experiments. There advantages atomic targets, such as closeness available energies anticipated masses, over nuclear target experiments end point...
Nuclear spin angular momentum in molecules with identical nuclei is conserved many physical and chemical processes, but its role reactions involving atomic rearrangements remains underexplored. In this study, we investigate the nuclear selection rules reaction between methylene (CH2) hydrogen (H2) using high-resolution infrared spectroscopy quantum solid parahydrogen. Our results show that triplet (3CH2) reaction, distribution of products matches perfectly expected for stepwise mechanism....
The nuclear spin conversion of CH(4) and CD(4) isolated in solid parahydrogen was investigated by high resolution Fourier transform infrared spectroscopy. From the analysis temporal changes rovibrational absorption spectra, rates associated with rotational relaxation from J=1 state to J=0 for both species were determined at temperatures between 1 6 K. rate found be 2-100 times faster than that this temperature range. is attributed quadrupole interaction D atoms CD(4), while takes place...
Abstract. Column-averaged dry-air mole fractions of methane (XCH4), retrieved from Greenhouse gases Observing SATellite (GOSAT) short-wavelength infrared (SWIR) spectra, were validated by using aircraft measurement data the National Oceanic and Atmospheric Administration (NOAA), US Department Energy (DOE), Institute for Environmental Studies (NIES), HIAPER Pole-to-Pole Observations (HIPPO) program, GOSAT validation observation campaign over Japan. In calculation XCH4 measurements...
In this paper, we describe an experiment which was conducted to explore the macro-coherent amplification mechanism using a two-photon emission process from first vibrationally-excited state of para-hydrogen molecule. Large coherence in initial prepared by adiabatic Raman population transfer method, and lowest Stokes sideband used as trigger field. We observed coherent consistent with expectation paired super-radiance master equation.
We report on coherent enhancement of two-photon emission from the excited vibrational state molecular hydrogen triggered by irradiating mid-infrared pulses externally. previously observed internally generated fourth Stokes photons. By injecting independent externally, it is possible to control experimental parameters and investigate mechanism in more detail. In this article, we describe using external trigger pulses. Its spectrum dependence energy timing pulse are presented along with...
Abstract. Atmospheric column-averaged mole fractions of carbon dioxide (XCO2) at 53 locations around the world were derived from aircraft measurements covering altitude range about 1–10 km. We used CO2 vertical profile three major cycle programs, a global climatological data set air number density profiles and tropopause height for calculating XCO2 period 2007–2009. Vertical mixing ratio are complemented by tall tower up to 400 m earth's surface simulated in stratosphere chemistry-transport...
We developed a fast X-ray detector system for nuclear resonant scattering (NRS) experiments. Our employs silicon avalanche photo-diode (Si-APD) as sensor. The is able to acquire both timing and energy of single photon simultaneously in high rate condition, 106 counts per second one Si-APD. performance the was investigated SPring-8, synchrotron radiation facility Japan. Good time resolution 120 ps (FWHM) achieved with slight tail distribution spectrum by level 10-9 at 1 ns apart from peak....
We observed two-photon emission (TPE) signal from the first vibrationally excited state of parahydrogen gas coherently by counter-propagating laser pulses. A single narrow-linewidth source has roles in excitation molecules and induction TPE process. measured dependences energy on detuning, target pressure, input pulse energies. These results are qualitatively consistent with those obtained numerical simulations based Maxwell–Bloch equations one spatial dimension temporal dimension. This...
The photochromic ligand bis(terpyridyl)hexaarylbiimidazole (bistpy-HABI) and the Fe(II) complex of bistpy-HABI with formula [{Fe(tpy)}2·bistpy-HABI](PF6)4·4H2O were synthesized characterized. Bistpy-HABI is readily cleaved into a pair terpyridyltriphenylimidazolyl radicals (tpy-TPI•) on irradiation UV light. This photochemical reaction completely reversible, light-induced can thermally recombine to form in dark. [{Fe(tpy)}2·bistpy-HABI]4+ first example transition-metal an HABI derivative was...
Solid para-H2 is a promising gain medium for stimulated Raman scattering, due to its high number density and narrow linewidth. In preparation the design of cw solid hydrogen laser, we have made first measurements, our knowledge, index refraction crystal, in wavelength range 430-1100 nm. For crystal stabilized at 4.4 K, this refractive measured be n(p-H2)=1.130±0.001 514 A slight, but significant, dependence on final crystal-growth temperature observed, with higher n(p-H2) temperatures. Once...
Nuclear resonant excitation and detection of its decay signal for the 26.27-keV level $^{201}\mathrm{Hg}$ is demonstrated with high-brilliance synchrotron radiation (SR) a fast x-ray detector system. This SR-based photonuclear scheme, known as nuclear scattering (NRS) in field materials science, also useful investigating properties, such half-lives radiative widths excited levels. To date, because limited time response detector, levels to which this method could be applied have been one...
We report extragalactic observations of two fluorine-bearing species, hydrogen fluoride (HF) and fluoronium (H2F+), in the z = 0.89 absorber front lensed blazar PKS 1830−211 with Atacama Large Millimeter/submillimeter Array. HF was detected toward both southwest northeast images blazar, column densities >3.4 × 1014 cm−2 0.18 cm−2, respectively. H2F+ not detected, down to an upper limit (3σ) 8.8 1011 abundance ratio [H2F+]/[HF] 1/386. also searched for Galactic sources NGC 6334 I W51C, center...
Buffer-gas cooling is a universal technique for molecules and used various purposes. One of its applications using inside buffer-gas cell low-temperature spectroscopy. Although high-intensity signal expected in the cell, complex molecular dynamics drawback precise In this study, we performed high-resolution absorption spectroscopy low-$J$ transitions $\stackrel{\ifmmode \tilde{}\else...
In this study, we report the Doppler-free spectra of buffer-gas-cooled CaOH. We observed five containing low-J Q1 and R12 transitions, which were only partially resolved by previous Doppler-limited spectroscopies. The frequencies corrected using iodine molecules; accordingly, uncertainty was estimated to be below 10 MHz. determined spin-rotation constant in ground state, agrees with values reported literature obtained based on millimeter-wave data within 1 This suggests that relative is much...