Scattering and Reactions of Intermediate Energy Projectiles (Physics)

将在国内外主要核物理加速器上开展核反应基本问题的研究。其中包括新墨西哥州洛斯阿拉莫斯的LAMPF，加拿大温哥华的TRIUMF，法国萨克雷的土星II，以及瑞士日内瓦的李尔。他们最近的工作表明，当弹丸在散射过程中损失超过20 MeV时，原子核出人意料地接受来自弹丸的自旋转移的激发。他们将继续这项工作，以确定这种多个核子的集体行动是否真的是整个元素周期表中原子核的一般特征。他们将继续研究原子核中的介子吸收机制。介子是核力的基本载体；当它与中子或质子结合时，它可以形成另一个粒子，即三角洲。研究人员还将探索核关联似乎会改变核内三角洲质量的反应。

Research will be conducted on fundamental problems in nuclear reactions at the major nuclear physics accelerators in this country and abroad. These include LAMPF, in Los Alamos, New Mexico, TRIUMF, in Vancouver, Canada, SATURNE II, in Saclay, France, and LEAR, in Geneva, Switzerland. Their recent work has shown that the nucleus is unexpectedly receptive to being excited by the transfer of spin from the projectile when the projectile loses more than about 20 MeV in the scattering process. They will continue this work to determine whether this collective action of many nucleons is truly a general feature of nuclei over the entire periodic table. They will pursue their investigations of pion absorption mechanisms in nuclei. The pion is the basic carrier of the nuclear force; when it combines with a neutron or proton, it can form another particle, the delta. The researchers will also explore reactions in which nuclear correlations seem to change the mass of the delta inside nuclei.