From the latest works

Complete Kinematics measurement of 17F+58Ni Reaction

A comprehensible study of the reaction mechanism, including the break-up and fusion reaction cross sections, was performed on the 17F+58Ni system. We successfully performed a "complete-kinematics" measurement, using an RI beam of proton-drip line nucleus 17F at CRIB, together with the MITA detector array, which was developed in China. The experiment revealed the composition of total reaction cross section; the quasielastic scattering, exclusive and inclusive breakup, and the fusion, by the powerful identification of the complete-kinematics measurment. A special enhancement of the reaction cross section was observed at the energy below the Coulomb barrier, which was found to be mainly due to the break-up coupling, more significant in the sub-barrier region.

Discovery of enhanced reaction of 8B+208Pb at sub Coulomb barrier energy

8B is a special nucleus as it is the lightest isotope of boron, and very weakly bound . We studied the reaction dynamics of the 8B+208Pb system in the energy range around the Coulomb barrier , where many reaction channels interplay. This measurement was realized by the unique 8B beam at CRIB, which had an energy near the Coulomb barrier, together with the EXPADES detector array brought from Italy. The reaction cross sections extracted with the optical model analysis clearly indicate a remarkably enhanced reaction probability for the very weakly bound 8B compared to similar mass nuclei interacting with the same target nucleus, which cannot be described with the present theory.

First measurement of the 30S+α resonant elastic scattering for X-ray bursts

The 30S(α, p) reaction is a key reaction in X-ray bursts , which are the most frequently observed thermonuclear explosions in the galaxy. To study 30S(α, p) reaction experimentally is still a challenge, due to the difficulty of measuring an RI to RI reaction. We performed the first α resonant elastic scattering measurement using an RI beam of 30S with an active target system, to study the properties of nuclear resonances which dominate reaction rates in high-temperature stellar environments. Three new resonances are newly found, and a new evaluation of 30S(α, p) reaction rate was made. Consequently, it was shown that this single reaction can change the energy generation rate of X-ray burst by 25% , and the abundances of A=20-80 nuclides by 30% .

For reference information, please see Publications page.

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