摘要
利用半导体望远镜探测器和ＰＰＡＣ对２５ＭｅＶ／ｕ４０Ａｒ＋９３Ｎｂ反应中的带电粒子和余核进行了关联测量，对所得α粒子能谱用三源模型进行了拟合，并由余核飞行时间和粒子多重性得到热核激发能．通过对温度的修正，发现在本实验中有激发能Ｅ＊／Ａ为４．３ＭｅＶ，温度Ｔｉｎｉｔ为６．９ＭｅＶ的热核形成。通过与其它实验结果的对比可以看出核物质在轻系统和重系统中行为的差异。
The charged particles and residues were correlatively measured by telescopes and PPACs in the reaction of 40Ar+93Nb at incident energy of 25 MeV / u. Energy spectra of αparticles were fitted by three moving sources and the excitation energy of hot nuclei were determined by the TOF of residues and particle multiplicity. Abstracted temperature was correlated thoroughly and the results show that hot nuclei with excitation energy E/A≈ 4.3MeV and temperature Tinit≈ 6.9MeV were formed in the reaction The behavior of nuclear matter in various systems was compared and the difference can be seen in the light and heavy reaction system.
出处
《高能物理与核物理》
EI
CSCD
北大核心
1998年第9期780-786,共7页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金
