Scattering and Reactions of Intermediate Energy Projectiles (Physics)

在国内外主要的核物理加速器上对核反应中的基本问题进行研究。这些机构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SATURNE II以及瑞士日内瓦的LEAR。他们最近的工作表明，当抛射体在散射过程中损失超过20兆电子伏时，原子核意外地接受抛射体自旋转移的激发。他们将继续这项工作，以确定许多核子的这种集体作用是否真的是整个元素周期表上原子核的普遍特征。他们将继续研究介子在原子核中的吸收机制。介子是核力的基本载体；当它与中子或质子结合时，它可以形成另一种粒子，即δ。研究人员还将探索核相关性似乎改变原子核内δ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.