摘要
利用离线γ能谱法，测定了１８．８－４６．２ＭｅＶ／ｕ的￣（１２）Ｃ离子与￣（９３）Ｎｂ相互作用中４３个靶余核的激发函数。这些激发函数随着入射能的变化大体上分为二类，定性显示了熔合－碎裂模型对于热核的类蒸发，类裂变和多破碎三种衰变模式的竞争演化预言的变化趋势。还发现了￣（９２）Ｎｂ￣ｍ的生成截面几乎恒定于５．０×１０￣（３０）ｍ￣２的反常现象。
The production cross-sections of 43 radioactive target residues are measured with off-linegamma spectrometry for the interaction of￣(12)C with￣(93)Nb at the bombarding energies from 18.8 to46.2MeV/u,These cross- sections seem to be grouped into three categories ,responding to thecompetition among three decay modes,i.e.the pseudoevaporation mode,the pseudofission modeand the multifragmentation mode,of hot nuclei in the energy region of interest. However,the prc-duction cross-section of￣(92)Nb￣m unusually keeps constant around 5.0×10￣(-30)m￣2.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
1994年第3期186-192,共7页
Journal of Nuclear and Radiochemistry
基金
国家自然科学基金资助项目
关键词
激发函数
热核衰变
靶余核
碳12
^(12)C+￣(93)Nb Gamma spectrometery Excitation function Decay modes of hot nuclei
