摘要
本文探讨了在2GeV/N～200 GeV/N能区,相对论性^(16)O原子核碎裂产生的He碎片动量分布宽度随其多重数的减小而增加的实验现象。研究表明随He碎片多重数的减小,弹核旁观体所获得的表面激发能增加,从而导致了He碎片的动量分布宽度增加。分析表明正是由于弹核旁观体在不同能量下获得了相同的激发能从而表现出在该能区产生的He碎片多重数分布与弹核能量无关的极限碎裂特征。
The increase of the width of the momentum distribution of He fragments with decreasing He--multiplicity in relativistic ^(16)O fragmentation at 2 GeV/N to 200 GeV/N is analyzed. The result shows that with decreasing Heunultiplicity the surface--excitation energy of the pro- jectile--spectator increases, which is the reason of the increase of the width of the momentum distribution. Although the incident energy changes the projectile--spectator obtains the same excitation energy under the same geometric conditions. This gives the limiting fragmentation behavior of the Hemultiplicity distribuion.
出处
《高能物理与核物理》
CSCD
北大核心
1992年第1期38-43,共6页
High Energy Physics and Nuclear Physics
基金
国家科学基金资助
