Integrated cosmic muon flux in the zenith angle range 0<cosθ<0.370 < \text{cos}\theta < 0.37 for momentum threshold up to 11.6 GeV/c

We have measured the cosmic muon flux in the zenith angle range<cosθ<0.37 with a detector comprising planes of scintillator hodoscope bars and iron blocks inserted between them. The muon ranges for up to 9.5 m-thick iron blocks allow the provision of muon flux data integrated over corresponding threshold momenta up to 11.6 GeV/c. Such a dataset covering the horizontal direction is extremely useful for a technique called muon radiography, where the mass distribution inside a large object is investigated from the cosmic muon distribution measured behind the object

Detection of on-surface objects with an underground radiography detector system using cosmic-ray muons

We have developed a compact muon radiography detector to investigate the status of the nuclear debris in the Fukushima Daiichi Reactors. Our previous observation showed that a large portion of the Unit-1 Reactor fuel had fallen to floor level. The detector must be located underground to further investigate the status of the fallen debris. To investigate the performance of muon radiography in such a situation, we observed 2 m cubic iron blocks located on the surface of the ground through different lengths of ground soil. The iron blocks were imaged and their corresponding iron density was derived successfully

Imaging the inner structure of a nuclear reactor by cosmic muon radiography

We studied the inner structure of the nuclear reactor of the Japan Atomic Power Company (JAPC) at Tokai, Japan, by muon radiography. Muon detectors were placed outside the reactor building. By detecting cosmic muons penetrating the wall of the reactor building, we could successfully identify objects such as the containment vessel, pressure vessel, and other structures of the reactor. We also observed a concentration of heavy material which can be attributed to the nuclear fuel assemblies stored in the nuclear fuel storage pool

Investigating the Blocking Effect of Alkanethiol Self-assembled Monolayer on Electrochemical Response of the Split Gq-based DNA-NTs-based Biosensor

The split G-quadruplex-based DNA-nanotweezwers-based electrochemical DNA sensor was characterized by focusing on the blocking ability of the mixed self-assembled monolayer (SAM) against the nonspecific adsorption of hemin and the direct reduction of oxygen on a gold electrode. We found that the mixed SAM composed of MCH and MHA (concentration of each alkanethiol in SAM formation solution was 1.0 mM : 0.1 mM) effectively suppressed the nonspecific adsorption of hemin and the direct reduction of oxygen on the gold electrode

Investigating the Blocking Effect of Alkanethiol Self-assembled Monolayer on Electrochemical Response of the Split Gq-based DNA-NTs-based Biosensor (Supporting Information)

The split G-quadruplex-based DNA-nanotweezwers-based electrochemical DNA sensor was characterized by focusing on the blocking ability of the mixed self-assembled monolayer (SAM) against the nonspecific adsorption of hemin and the direct reduction of oxygen on a gold electrode. We found that the mixed SAM composed of MCH and MHA (concentration of each alkanethiol in SAM formation solution was 1.0 mM : 0.1 mM) effectively suppressed the nonspecific adsorption of hemin and the direct reduction of oxygen on the gold electrode.</p