38 Result(s)
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Article
Correction to: Nuclear-moment measurement using highly spin-aligned RI beams: Recent activities at RIBF
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Article
Nuclear-moment measurement using highly spin-aligned RI beams: Recent activities at RIBF
The magnetic dipole moment and the electric quadrupole moment are the nuclear moments that provide us with key information about the proton and neutron configurations in a nucleus and the shape of a nucleus, r...
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Article
Performance assessment of a new laser system for efficient spin exchange optical pum** in a spin maser measurement of 129Xe EDM
We demonstrate spin-exchange optical pum** of 129Xe atoms with our newly made laser system. The new laser system was prepared to provide higher laser power required for the stable operation of spin maser oscill...
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Article
Laser spectroscopy of atoms in superfluid helium for the measurement of nuclear spins and electromagnetic moments of radioactive atoms
A new laser spectroscopic method named “OROCHI (Optical RI-atom Observation in Condensed Helium as Ion catcher)” has been developed for deriving the nuclear spins and electromagnetic moments of low-yield exoti...
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Article
Open AccessExperimental search for the electron electric dipole moment with laser cooled francium atoms
A laser cooled heavy atom is one of the candidates to search for the permanent electric dipole moment (EDM) of the electron due to the enhancement mechanism and its long coherence time. The laser cooled franci...
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Article
EDM measurement in 129Xe atom using dual active feedback nuclear spin maser
The technique of an active nuclear spin maser is adopted in the search for electric dipole moment in a diamagnetic atom 129Xe. In order to reduce systematic uncertainties arising from long-term drifts of the exte...
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Article
Development of high-homogeneity magnetic field coil for 129Xe EDM experiment
We search for 129Xe EDM by using an active nuclear spin maser. In this experiment, the amplitude of the maser oscillation signal is one of the most important parameters that eventually determine the frequency pre...
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Article
Nuclear spin maser and experimental search for 129 Xe atomic EDM
The present status of an active spin maser which is being developed for an experimental search for 129Xe atomic electric dipole moment (EDM) is presented. In order to realize the long term stability of maser freq...
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Article
Creation of polarized ultracold neutrons and observation of Ramsey resonance for electric dipole moment measurement
Polarized UCNs have been created by selecting only one spin state passing through a magnetized Fe foil. Typical degree of polarization was about 90 %. The polarization relaxation time in the prototype Ramsey c...
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Article
Novel method for the production of spin-aligned RI beams in projectile fragmentation reaction with the dispersion matching technique
A novel method to produce spin-aligned rare-isotope (RI) beam has been developed, that is the two-step projectile fragmentation method with a technique of dispersion matching. The present method was verified i...
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Article
Precise nuclear moments of extremely proton-rich nuclus 23 Al
Electric quadrupole coupling constant eqQ/h of the extremely proton-rich 23Al (I π = 5/2 + , T 1/2 = 0.47 s) nucleus implanted i...
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Article
Beta-NMR measurement of 58Cu in Si
The β-NMR study of short-lived nucleus 58Cu (I π = 1 + , T 1/2 = 3.2 s) in Si has been performed. Spin polarization of 58Cu indu...
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Article
Observation of iron impurity diffusion in silicon under bending stress by Mössbauer spectroscopy
External bending stress was applied to a 57Fe-doped n-type silicon wafer, and transmission Mössbauer spectra were measured at room temperature in order to observe directly stress induced diffusion of 57Fe atoms i...
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Article
Development of atomic-beam resonance method to measure the nuclear moments of unstable nuclei
We have been working on the development of a new technique of atomic-beam resonance method to measure the nuclear moments of unstable nuclei. In the present study, an ion-guiding system to be used as an atomic...
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Article
Optical-coupling nuclear spin maser under highly stabilized low static field
A nuclear spin maser of a new type, that employs a feedback scheme based on optical nuclear spin detection, has been fabricated. The spin maser is operated at a low static field of 30 mG by using the optical d...
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Article
Electric quadrupole moments of neutron-rich nuclei 32Al and 31Al
The electric quadrupole moments for the ground states of 32Al and 31Al have been measured by the β ray-detected nuclear quadrupole resonance method. Spin-polarized 32Al and 31Al nuclei were obtained from the frag...
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Article
Production of spin-polarized 17N beam using inverse-kinematics low-energy transfer reactions
A new method to produce spin-polarized radioactive nuclear beams has been developed, which takes advantage of the low-energy transfer reaction in inverse kinematics. The method provides beam energies of a conv...
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Article
Reactions of 57Mn implanted into solid oxygen
The in-beam Mössbauer spectroscopy using a short-lived 57Mn (T 1/2=1.5 min) beam was carried out to study the production of the exotic chemical species of 57Fe atoms arising from 57Mn implanted in...
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Article
Nuclear Spin Maser Oscillation of 129Xe by Means of Optical-Detection Feedback
We have developed the nuclear spin maser oscillating at a low frequency of 34 Hz with highly polarized nuclear spins of the noble gas element 129Xe. The system is advantageous for detecting a small frequency shif...
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Chapter and Conference Paper
In-beam Mössbauer Study of 57Fe Species Arising from 57Mn Implanted into KMnO4
We have succeeded in obtaining well-resolved in-beam Mössbauer spectra of 57Fe arising from short-lived 57Mn (T 1/2 = 1.45 min) implanted into potassium permanganate (KMnO4) between 11 K and 155 K. Th...
