Spin Excitations in Nuclei

研究了450 MeV(^3He，t)反应后质子和中性衰变的测量技术问题，大大改进了数据采集系统。用多个硅和中子探测器进行中子和质子衰变的符合技术，是与“大雷登”谱仪的焦平面探测器系统相符合的。本财政年度研究的课题包括：1.通过电荷交换反应产生的核自旋巨共振；2.镜像核中的粒子衰变；3.太阳中微子与质子碰撞中的中微子和Yb(3He，t)反应；4.质子-质子碰撞中的伽马射线产生机制；5.中微子吸收截面Ga6.通过(^3He，t)和(t，^3He)反应研究镜像对称核的核结构.7.中微子和核自旋反应.作为下一个主题，我们在KVI和RCNP准备了一些新的实验.为了理解核中自旋激发引起的质子和中子衰变，我们已经开始进行理论计算.

We studied the techinical problems to measure proton and neutrom decays followtng the (^3He, t) reactions at 450 MeV.The data taking system was greatly inproved. The coincidence technique using multe silicon- and neutron- detectors has been developed for the neutron and proton decays in coincidence with the focal plane detector system of the spectrometer "Grand Raiden". The following subjects were studied in this fiscal year ;1.Nuclear spin giant resonances via charge exchange reactions.2.Particle decays from the mirror ^<12>N and ^<12>B nuclei.3.Solar neutrinos and ^<176>Yb(^3He, t) reaction.4.gamma-ray production mechanism in proton-proton collision.5.Neutrino absorption cross section of ^<71>Ga6.Nuclear Structure of mirror sysmetry nuclei via the (^3He, t) and (t, ^3He) reactions.7.Neutrinos and Nuclear spin responses.As the next subject, we prepare some new experiments at KVI and RCNP.Sophisticated theoretical calculations in understanding the proton and neutron decays from the spin excitations in nuclei have started.