Tohru Motobayashi

Solar fusion cross-sections

We review and analyze the available information on the nuclear-fusion cross sections that are most important for solar energy generation and solar neutrino production. We provide best values for the low-energy cross-section factors and, wherever possible, estimates of the uncertainties. We also describe the most important experiments and calculations that are required in order to improve our knowledge of solar fusion rates.

Solar fusion cross sections II: the pp chain and CNO cycles

The available data on nuclear fusion cross sections important to energy generation in the Sun and other hydrogen-burning stars and to solar neutrino production are summarized and critically evaluated. Recommended values and uncertainties are provided for key cross sections, and a recommended spectrum is given for {sup 8}B solar neutrinos. Opportunities for further increasing the precision of key rates are also discussed, including new facilities, new experimental techniques, and improvements in theory. This review, which summarizes the conclusions of a workshop held at the Institute for Nuclear Theory, Seattle, in January 2009, is intended as a 10-year update and supplement to 1998, Rev. Mod. Phys. 70, 1265.

Coulomb Dissociation of B-8 and the Be-7(p, Gamma)b-8 Reaction At Low Energies

The cross section for Coulomb dissociation of [sup 8]B---the [sup 208]Pb([sup 8]B,[sup 7]Be [ital p])[sup 208]Pb reaction---was measured using a [sup 8]B radioactive beam of 46.5 MeV/nucleon energy, and the cross section for the [sup 7]Be([ital p],[gamma])[sup 8]B capture reaction was deduced at low energies; [ital E][sub c.m.]=0.6[minus]1.7 MeV. The extracted astrophysical [ital S][sub 17] factors were found to be consistent with the values measured by Vaughn [ital et] [ital al]. and Filippone [ital et] [ital al]. This result encourages further experimental studies extended to lower relative energies for a new determination of the [ital S][sub 17] value relevant to the [sup 8]B solar neutrino flux.

Properties of BaF2 scintillators in charged particle detection

Abstract The pulse height response (total light output and fast component) of BaF 2 scintillators to various particles (p, d, α, 16 O and 40 Ar) was measured. Radiation damage tests where also made.

A new method of position determination for a two-dimensional position-sensitive detector

Abstract A new formula of position determination for a two-dimensional position-sensitive silicon detector was derived from a charge wave diffusion model including the effects of edge reflections. Its functional form is simple and therefore suitable for on-line use. The method was applied to actual data from a detector with 45 × 45 mm 2 active area and 300 μm thickness and gave good position linearity. An optimum shaping time constant of the amplifier was determined on the condition that the effect of ballistic deficit is negligible and energy and position resolution are good.

Solar fusion cross sections. II. Theppchain and CNO cycles

The available data on nuclear fusion cross sections important to energy generation in the Sun and other hydrogen-burning stars and to solar neutrino production are summarized and critically evaluated. Recommended values and uncertainties are provided for key cross sections, and a recommended spectrum is given for {sup 8}B solar neutrinos. Opportunities for further increasing the precision of key rates are also discussed, including new facilities, new experimental techniques, and improvements in theory. This review, which summarizes the conclusions of a workshop held at the Institute for Nuclear Theory, Seattle, in January 2009, is intended as a 10-year update and supplement to 1998, Rev. Mod. Phys. 70, 1265.

Measurement of the 13N + 12,13C elastic scatterings

Abstract The 13 N + 12,13 C elastic scatterings have been measured at laboratory energies of 16.3, 20. and 29.5 MeV. It is shown that the 13 N + 12 C and 13 C + 12 C systems seem to comply with charge symmetry. A preliminary analysis of the 13 N + 13 C system reveals very interesting data which cannot be reproduced easily. First investigations are presented.

Low-lying Structures Of Exotic Sc Isotopes And The Evolution Of The N=34 Subshell Closure

Recent investigations of exotic nuclei with

Invariant Mass Spectroscopy of

N=32

^{17}

and