A5004178698- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Nuclear physics research studies
- Radioactive Decay and Measurement Techniques
- Electron and X-Ray Spectroscopy Techniques
- Quantum, superfluid, helium dynamics
- Quantum optics and atomic interactions
- Mass Spectrometry Techniques and Applications
- Particle accelerators and beam dynamics
- Radiation Therapy and Dosimetry
- Scientific Measurement and Uncertainty Evaluation
- Quantum Chromodynamics and Particle Interactions
- Particle Accelerators and Free-Electron Lasers
- Electrostatic Discharge in Electronics
- Integrated Circuits and Semiconductor Failure Analysis
- Radiation Detection and Scintillator Technologies
- Laser-induced spectroscopy and plasma
- Particle physics theoretical and experimental studies
- Advanced Materials Characterization Techniques
- Cryptographic Implementations and Security
- Advanced MRI Techniques and Applications
- Advanced NMR Techniques and Applications
RIKEN Nishina Center
2021-2024
RIKEN
2019-2022
Campbell Collaboration
2022
University of British Columbia
2018-2019
Tohoku University
2010-2018
Japan Radioisotope Association
2014-2017
The direct $3\ensuremath{\alpha}$ decay branch from the ${0}_{2}^{+}$ state at ${E}_{x}=7.65\text{ }\mathrm{MeV}$ in $^{12}\mathrm{C}$, which is known as Hoyle state, considered to affect triple-$\ensuremath{\alpha}$ reaction rate strongly and give crucial information on its structure. We have performed a high-precision measurement of this using $^{12}\mathrm{C}(^{12}\mathrm{C},3\ensuremath{\alpha})^{12}\mathrm{C}$ ${E}_{^{12}\mathrm{C}}=110\text{ }\text{ }\mathrm{MeV}$. branching ratio was...
We installed a source for ultracold neutrons at new, dedicated spallation target TRIUMF. The was originally developed in Japan and uses superfluid-helium converter cooled to 0.9$\,$K. During an extensive test campaign November 2017, we extracted up 325000 after one-minute irradiation of the target, over three times more than previously achieved with this source. corresponding ultracold-neutron density whole production guide volume is 5.3$\,$cm$^{-3}$. storage lifetime initially 37$\,$s...
To search for low-energy resonant structures in isospin T=3/2 three-body systems, we have performed the experiments H3(t,He3)3n and He3(He3,t)3p at intermediate energies. For 3n experiment, newly developed a thick Ti-H3 target that has largest tritium thickness among targets of this type ever made. The experiment first time covered momentum-transfer region as low 15 MeV/c, which provides ideal conditions producing fragile systems. However, excitation-energy spectra obtained, did not observe...
The search for the electric-dipole moment (EDM) of laser-cooled francium (Fr) atoms could lead to a measurement electron EDM. It is predicted that EDM would be enhanced by approximately three orders magnitude in heavy such as Fr. Laser-cooling and trapping techniques are expected suppress statistical systematic errors precision measurements. magneto-optical trap was achieved using stable rubidium developing factory radioactive atoms. In light results from experiments, we found an upgrade...
A laser cooled heavy atom is one of the candidates to search for permanent electric dipole moment (EDM) electron due enhancement mechanism and its long coherence time. The francium (Fr) factory has been constructed perform EDM at Cyclotron Radioisotope Center, Tohoku University. present status Fr production measurement system presented.
A mechanical cavity of coaxial or waveguide type is generally used as a resonator Gunn oscillator. Reported here the use consisting ferrimagnetic sample instead to obtain electrically tunable Gun The coupling between diode and was experimentally observed oscillation frequency from 3.2 GHz 2.4 obtained proportionally applied dc magnetic field.
The finite value of an electron electric dipole moment (eEDM) provides the direct evidence for violation time reversal symmetry. Fr atoms, whose enhancement factor is 895, trapped by laser cooling and trapping techniques are one strongest candidates measuring eEDM. We constructing a beamline eEDM using laser- cooled atoms at Cyclotron Radioisotope Center. have developed light sources including frequency stabilization system magneto-optical trap atoms. As production requires cyclotron...
We demonstrate frequency offset locking between two laser sources using a waveguide-type electro-optic modulator (EOM) with 10th-order sidebands for magneto-optical trapping of Fr atoms. The error signal was successfully obtained by performing delayed self-homodyne detection the beat repumping and sideband component light. Sweeping trapping-light repumping-light frequencies keeping its difference 46 GHz confirmed over 1 monitoring Doppler absorption profile I₂. This technique enables us to...
Abstract We propose a method to measure the electron electric dipole moment (eEDM) using ultracold entangled francium (Fr) atoms trapped in an optical lattice, yielding uncertainty below standard quantum limit. Among alkali atoms, Fr offers largest enhancement factor eEDM. With based experiment, sensing states could enable search for eEDM at level 10 −30 e cm. estimate statistical and systematic errors attached proposed measurement scheme on this technique. A successful of exploration new...
In order to search for the α condensed state in 16 O , we have performed decay particle measurement via [Formula: see text] reaction. Although branching ratio of + 12 C channel was predicted be small, between and channels obtained 7:3 by using result a simple simulation.
We report high-resolution Doppler-free two-photon excitation spectroscopy of Xe from the ground state to $5{p}^{5}(^{2}P_{3/2})6p\phantom{\rule{0.16em}{0ex}}\phantom{\rule{0.16em}{0ex}}^{2}[3/2]_{2}$ electronic excited state. This is a first step developing comagnetometer using polarized $^{129}\mathrm{Xe}$ atoms for planned neutron electric dipole moment measurements at TRIUMF. Narrow linewidth radiation 252.5 nm produced by continuous wave laser was built up in an optical cavity excite...
A fast-switching, high-repetition-rate magnet and power supply have been developed for operated at TRIUMF, to deliver a proton beam the new ultracold neutron (UCN) facility. The facility possesses unique operational requirements: time-averaged current of 40~$\mu$A with ability switch on or off several minutes. These requirements are in conflict typical operation mode TRIUMF cyclotron which delivers nearly continuous multiple users. To enable creation UCN facility, beam-sharing arrangement...
Francium is the heaviest species among alkali elements. Due to its properties, francium said be of advantage in measurements tiny observations, such as atomic parity violation and electric dipole moment. Before executing experiments with francium, it must produced artificially because one most unstable We nuclear fusion reaction an oxygen beam gold target, ionized through a thermal ionization process, extracted ion electrostatic fields. However, process known ionize not only objective atom...
The search for the violation of fundamental symmetry in a radioactive atom is promising candidate precision tests standard model and its possible extensions. subtle signal arising from enhanced heavy atoms, such as francium (Fr). To realize high measurements, large amount isotopes required. Fr produced via nuclear fusion reaction using melted gold target with (18)O primary beam at Cyclotron Radioisotope Center, Tohoku University. maximum extraction efficiency ion was achieved approximately...
For the measurement of electron electric dipole moment using Fr atoms, a ion-atom conversion is one most critical process. An converter based on “orthotropic” type source has been developed. This able to convert few keV ion beam thermal atomic cycle surface ionization and neutralization. In this article, development reported.