Publications (13)
Rabi-Oscillation Spectroscopy of the Hyperfine Structure of Muonium Atoms
S. Nishimura, H. A. Torii, Y. Fukao +26
As a new method to determine the resonance frequency, Rabi-oscillation spectroscopy has been developed. In contrast to the conventional spectroscopy which draws the resonance curve…
Enhancement of muonium emission rate from silica aerogel with a laser ablated surface
G. A. Beer, Y. Fujiwara, S. Hirota +24
Emission of muonium () atoms from a laser-processed aerogel surface into vacuum was studied for the first time. Laser ablation was used to create hole-like regions with di…
A search for deeply bound kaonic nuclear states
T. Suzuki, H. Bhang, G. Franklin +26
We have measured proton and neutron energy spectra by stopping negative kaons on liquid helium4. Two distinct peak structures were found on both spectra, which were assigned to the…
A New Approach for Measuring the Muon Anomalous Magnetic Moment and Electric Dipole Moment
M. Abe, S. Bae, G. Beer +93
This paper introduces a new approach to measure the muon magnetic moment anomaly , and the muon electric dipole moment (EDM) at the J-PARC muon facility. The…
Muonic X-Ray Measurement for the Nuclear Charge Distribution: the Case of Stable Palladium Isotopes
T. Y. Saito, M. Niikura, T. Matsuzaki +16
Background: The nuclear charge radius and distribution are the most fundamental quantities of the atomic nucleus. From the muonic transition energies, the absolute charge radius ha…
Improved Measurements of Muonic Helium Ground-State Hyperfine Structure at a Near-Zero Magnetic Field
P. Strasser, S. Fukumura, R. Iwai +9
Muonic helium atom hyperfine structure (HFS) measurements are a sensitive tool to test the three-body atomic system and bound-state quantum electrodynamics theory, and determine fu…
Measurement of muonium emission from silica aerogel
P. Bakule, G. A. Beer, D. Contreras +28
Emission of muonium () atoms from silica aerogel into vacuum was observed. Characteristics of muonium emission were established from silica aerogel samples with densit…
Development of microwave cavities for measurement of muonium hyperfine structure at J-PARC
K. S. Tanaka, M. Iwasaki, O. Kamigaito +16
The MuSEUM collaboration is planning measurements of the ground-state hyperfine structure (HFS) of muonium at the Japan Proton Accelerator Research Complex (J-PARC), Materials and…
Measurement of production branching ratio after muon nuclear capture reaction of Al and Si isotopes
R. Mizuno, M. Niikura, T. Y. Saito +18
Background: Muon nuclear capture is a reaction between a muon and a proton inside a nucleus through weak interactions. This reaction results in the formation of an excited nucleus,…
Acceleration of positive muons by a radio-frequency cavity
S. Aritome, K. Futatsukawa, H. Hara +52
Acceleration of positive muons from thermal energy to keV has been demonstrated. Thermal muons were generated by resonant multi-photon ionization of muonium atoms emitted fro…
Few-electron highly charged muonic Ar atoms verified by electronic x rays
T. Okumura, T. Azuma, D. A. Bennett +40
Electronic x rays emitted by muonic Ar atoms in the gas phase were observed using a superconducting transition-edge-sensor microcalorimeter. The high-precision energy spectra p…
New precise spectroscopy of the hyperfine structure in muonium with a high-intensity pulsed muon beam
S. Kanda, Y. Fukao, Y. Ikedo +20
A hydrogen-like atom consisting of a positive muon and an electron is known as muonium. It is a near-ideal two-body system for a precision test of bound-state theory and fundamenta…
Indication of a strange tribaryon S^+ from the ^4He(stopped K^-,n) reaction
M. Iwasaki, T. Suzuki, H. Bhang +26
We measured the neutron time-of-flight spectrum in the ^4He(stopped K^-, n) reaction by stopping negative kaons in a superfluid helium target. A clear enhancement was observed in t…