S. Kubono

Determination of the astrophysical 13N (p, γ) 14O cross section through the Coulomb dissociation method☆

Abstract The Coulomb dissociation reaction 208Pb(14O, 13N p)208Pb was measured at Ein = 87.5 MeV/u to determine the radiative width Γγ of the 1− state in 14O at Eex = 5.17 MeV. This state dominates the radiative capture process 13N(p, γ) 14O, a key reaction in the hot CNO cycle of hydrogen burning in stars. We have deduced Γγ = 3.1 ± 0.6 eV with the help of a coupled channel calculation. The validity of the technique was confirmed in the case of the 208Pb(13N, 12C p)208Pb reaction exciting the 1 2 + state in 13N whose width is known.

21Na(p,gamma)22Mg reaction and oxygen-neon novae.

The 21Na(p,gamma)22Mg reaction is expected to play an important role in the nucleosynthesis of 22Na in oxygen-neon novae. The decay of 22Na leads to the emission of a characteristic 1.275 MeV gamma-ray line. This report provides the first direct measurement of the rate of this reaction using a radioactive 21Na beam, and discusses its astrophysical implications. The energy of the important state was measured to be E(c.m.)=205.7+/-0.5 keV with a resonance strength omegagamma=1.03+/-0.16(stat)+/-0.14(sys) meV.

Spin-Isospin Resonances Observed in the (d,2He) and (12C,12N) Reactions at E/A = 135 MeV

Abstract The (d, 2 He) and ( 12 C, 12 N) charge-exchange reactions have been studied at E/A = 135 MeV using the high resolution spectrograph SMART at RIKEN. The similarities were found in the energy spectra of both reactions, indicating the strong selectivity of ΔS = 1 and ΔT = 1 transitions. The 12 C( 12 C, 12 N) 12 B reaction has been studied using the microscopic DWBA calculation, suggesting that the reaction predominantly goes thorough a one-step process. The dominance of the L = 0 component was also found.

First application of the Trojan horse method with a radioactive ion beam: Study of the 18 F(p,α)15 O reaction at astrophysical energies

Measurement of nuclear cross sections at astrophysical energies involving unstable species is one of the most challenging tasks in experimental nuclear physics. The use of indirect methods is often unavoidable in this scenario. In this paper the Trojan Horse Method is applied for the first time to a radioactive ion beam induced reaction studying the

New measurement of the 11B(p,α0)8Be bare-nucleus S(E) factor via the Trojan horse method

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Beta-decay of 20Mg

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A focal plane detector for the INS-QDD magnetic spectrograph

p,{\alpha}

Splitting of low-lying octupole vibrational strength in 76,78,80,82Kr

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Resonant structures in the excitation functions of the 20Ne(16O, 12C)24Mg reaction

^{15}

Study of the β-delayed neutron emission of 19C

O process at low energies relevant to astrophysics via the three body reaction