Study of Gamow-Teller Transitions Playing Important Roles In the Neutrino Nucleosynthesis

伽莫夫-泰勒跃迁是最常见的核弱过程之一。研究的兴趣不仅是核物理学，而且是天体物理学；它在各种核合成过程中起着重要的作用，如超新星爆炸中的中微子诱导反应。通过弱过程本身的研究可以获得相对有限的信息。然而，发现电荷交换反应，如（p,n）反应，可以模拟Gamow-Teller跃迁。他们可以在研究中扩展能量区域。随着（3He,t）测量中能量分辨率的一个数量级的提高，现在可以研究Gamow-Teller激发的精细结构，甚至是Gamow-Teller巨共振的精细结构。讨论了具有天体物理学意义的pf壳核伽莫夫-泰勒跃迁强度的测定。

Gamow-Teller transition is one of the most popular nuclear weak processes. The interest in the study is not only of nuclear physics, but also of astrophysics ; it plays important roles in various nucleosynthesis processes such as neutrino-induced reactions in supernova-explosion. Relatively limited information can be obtained through the study of weak processes themselves. However, it was found that charge-exchange reactions, such as (p,n) reaction, can simulate the Gamow-Teller transitions. They could extend the energy region in the study. With the one-order-of- magnitude improvement of the energy resolution in (3He,t) measurements, fine structures of Gamow-Teller excitations, even those of Gamow-Teller giant resonances, can now be studied. Determination of Gamow-Teller transition strengths for pf-shell nuclei with astrophysical interest is discussed.