parent ion meaning in English

母离子；亲体离子

( 3 ) the possible mechanism of dissociation / ionization is analyzed . it can be concleded that the main dissociation channel is resonant photoionization of parent molecule followed by photodissociation of parent ion and the further photodissociation or photoionization of the fragments
( 4 )分析结果表明二硫化碳分子的主要解离通道为:二硫化碳分子( 2 + l )咫mpi ，然后解离为碎片离子或中性碎片，解离碎片进一步解离或电离。