大多数超重元素是采用熔合蒸发反应合成的。限于可被利用的束流与靶材料，这种方法目前只能产生缺中子的短寿命超重核。近年来，理论研究预测利用多核子转移反应可以产生一些反应截面较大的丰中子超重核, 如267-272Sg, 但当前尚无快速、高效分离转移反应产物的实验方法。人们在对超重元素的气相化学性质研究中发现，某些超重元素可以在特定气体氛围中被减速热化并形成挥发性化合物，使用气喷技术可以在几秒钟内将这些挥发性化合物与其它元素分离。基于这种现象本课题将发展新的气喷技术用于分离和探测48Ca + 243Am反应中生成的转移反应产物266-269Sg，并测量其反应截面（或反应截面上限）。

Most superheavy elements were synthesized using fusion-evaporation reaction. Due to the available beam and target materials, only neutron-deficient superheavy nuclei with short half-lives could be generated by this method thus far. In recent years, some neutron-rich superheavy nuclei, such as 267-272Sg, were predicted to be produced by the multi-nucleon transfer reaction with sufficient yield. However, no rapid and efficient method has been found for the separation of transfer products. The chemical studies on superheavy elements show that some.superheavy elements can be transformed to volatiles in particular gaseous environments and separated from other elements within several seconds. Based on this phenomenon, we would like to develop a new gas-jet technique for the separation and detection of 266-269Sg nuclei which are produced by the transfer reaction of 243Am(48Ca, X) 266-269Sg.