64 citations · 193 across the 13 of their papers we have counts for
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Precise Neutron Lifetime Measurement Using Pulsed Neutron Beams at J-PARC
N. Sumi, K. Hirota, G. Ichikawa +18
A neutron decays into a proton, an electron, and an anti-neutrino through the beta-decay process. The decay lifetime (880 s) is an important parameter in the weak interaction…
Neutron lifetime measurement with pulsed cold neutrons
K. Hirota, G. Ichikawa, S. Ieki +26
The neutron lifetime has been measured by comparing the decay rate with the reaction rate of He nuclei of a pulsed neutron beam from the spallation neutron source at the Japan…
Precision Measurement of the Position-space Wave Functions of Gravitationally Bound Ultracold Neutrons
Y. Kamiya, G. Ichikawa, S. Komamiya
Gravity is the most familiar force at our natural length scale. However, it is still exotic from the view point of particle physics. The first experimental study of quantum effects…
Observation of the Spatial Distribution of Gravitationally Bound Quantum States of Ultracold Neutrons and Its Derivation Using the Wigner Function
G. Ichikawa, S. Komamiya, Y. Kamiya +9
Ultracold neutrons (UCNs) can be bound by the potential of terrestrial gravity and a reflecting mirror. The wave function of the bound state has characteristic modulations. We carr…