Takeshi Kaihori

Measurements of the 152Srn(γ,n) Cross Section with Laser-Compton Scattering γ Rays and the Photon Difference Method

The cross sections of the 152Sm(γ,n) and 197Au(γ,n) reactions have been measured with the laser-Compton scattering (LCS) γ beam in the 8.3–12.4MeV energy range. The photon difference method has been used for LCS γ rays in the data analysis for the first time. The present data for 197Au measured as the standard are in agreement with the preceding data and the recent recommendation. On the other hand, the preceding data for 152Sm at 8.3 MeV are twice as large as the present data.

Measurement of the 80Se(γ, n) Cross Section Using Laser-Compton Scattering γ-Rays

The 80Se(γ, n)79Se cross section was measured with laser-Compton scattering (LCS) γ-rays to supply fundamental data for the estimation of the inverse reaction cross sections, i.e., the 79Se(n, γ)80Se cross section. An enriched 80Se sample and a reference 197Au sample were irradiated with LCS γ-rays whose maximum energy was varied from 10.5 to 16.0 MeV. The energy distributions of LCS γ-rays were precisely determined using a high-resolution high-energy photon spectrometer (HHS). Emitted neutrons were detected by a high-efficiency 4π-3He detector. The excitation function of the 80Se(γ, n) cross section was determined for the energy range of 10.2–14.6 MeV. The energy point corresponding to each cross section was deduced using the accurately determined energy distribution of LCS γ-rays.

Application of High-Energy Photon CT System With Laser-Compton Scattering to Non-Destructive Test

A computed tomography (CT) system using high-energy monochromatic photons is one of the best choices for non-destructive tests, to detect flaws or defects in manufactured items for the purpose of improving quality control, and quality assurance. We have developed such a CT system based on laser-Compton X-rays, which were generated with an electron accelerator and a laser beam. Using 10 MeV laser-Compton X-rays, an experimental study for non-destructive tests of concrete specimens with computed tomography were performed. We successfully obtained CT images.

Photodisintegration of {sup 80}Se: Implications for the s-process branching at {sup 79}Se

Photoneutron cross sections were measured for

Enhanced photoneutron cross sections for zirconium isotopes near threshold: evidence for extra M1 strength?

^{80}mathrm{Se}

80Se(γ,n)79Se cross section and s‐process branching at 79Se

immediately above the neutron separation energy with quasimonochromatic

Measurement of the mass attenuation coefficients of Ge and BGO for high-energy gamma-rays

ensuremath{gamma}

Photodisintegration of 80Se and its implications for s-process branching

-ray beams to experimentally constrain the

Partial photoneutron cross sections for the isomeric state 180Tam.

E1