The present invention is directed to the provision of an isotope separation method, which can effectively prevent, without the use of a second gas, a secondary reaction and the formation of a polymer involved in a multiphoton dissociation reaction in laser isotope separation and, at the same time, can efficiently separate a target isotope with low activation energy, and a working substance for use in the isotope separation. The isotope separation method comprises the step of irradiating a working substance for isotope separation comprising a compound represented by formula SiX3-CY2-CZ3 or SiX3-CY═CZ2, wherein X, Y, and Z, which may be the same or different, represent a halogen atom, H, or an alkyl group; and at least one of Z's represents a halogen atom with the remaining Z's being H or an alkyl group, with a laser beam to dissociate only a molecule containing a particular target isotope atom, whereby the dissociation product or the nondissociation molecule is enriched with the target Si isotope atom.
本发明旨在提供一种同位素分离方法,该方法可以在激光同位素分离中有效地防止二次反应和聚合物的形成,而无需使用第二种气体,同时可以高效地分离具有低活化能的目标同位素,并提供用于同位素分离的工作物质。该同位素分离方法包括以下步骤:用激光束照射一个用于同位素分离的工作物质,该工作物质包括化合物SiX3-CY2-
CZ3或SiX3-CY═
CZ2,其中X、Y和Z(可能相同或不同)表示卤素原子、H或烷基;至少其中一个Z表示卤素原子,其余的Z表示H或烷基,仅使含有特定目标同位素原子的分子解离,从而富集目标Si同位素原子的解离产物或非解离分子。