Isospin excitation of nucleus in 42,44,48Ca (p,n)42,44,48Sc

To obtain information of (p,n) reaction of heavy nucleus in 100 MeV or less, 42,44,48Ca(p,n)42,44,48Sc was observed on the Cyclotron Radio Isotope Center in Tohoku University. The experimental results showed that 7, 8 and 10 spin parities were determined for 42Sc, 44Sc and 48SC, respectively. It was the first determination of one and two negative parity transition of 42Sc and 48Sc,respectively, by (p,n) reaction. The full space wave function made by 0f1p shell effective interaction by Richter,et al is good accuracy and reliability. On the (p,n) reaction at Ep=35 MeV, the transition matrix elements of 42Ca, 44Ca and 48Ca were derived. On the experiment of 42Ca(p,n)42Sc at Ep<100 MeV, dependence of nucleon effective interaction isovector strength rate lJστ/Jτl2 on energy was agreed with the calculation results by Franey and Love. The nuclear structure of 42Ca was thought to show more stronger U(4) symmetry, because strong GT transition at T=1 was not observed, which was expected by j-j bonding shell model calculation. (S.Y.)