利用同步辐射光和反射飞行时间质谱,研究了丙烯酸甲酯9.0～15.5eV能量范围的真空紫外光电离和光解离.实验测量丙烯酸甲酯的光电离质谱和解离碎片离子m/e =86(C4H6O2+),85(C4H5O2+),59(C2H3O2+),58(C3H6O+) ,55(C3H3O+),42(C3H6+),31(CH3O+),27(C2H3+),和15(CH3+)的光电离效率曲线.并利用量子化学从头算(G3),计算碎片离子的能级,推测它们的解离通道.计算的电离能和出现势与实验结果符合很好.结果表明,丙烯酸甲酯的光电离解离通道以单键断裂反应为主. The UV-Vis ionization and photodissociation of methyl acrylate in the energy range of 9.0-15.5eV were studied by using synchrotron radiation and time of flight mass spectrometry (FT-MS). The photoionization mass spectra of the methyl acrylate and the dissociated fragment ion m / e = 86 (C4H6O2 + ), 85 (C4H5O2 +), 59 (C2H3O2 +), 58 (C3H6O +), 55 (C3H3O +), 42 (C3H6 +), 31 (CH3O +), 27 (C2H3 +), and 15 (CH3 + Quantum chemistry ab initio calculation (G3), calculate the energy levels of fragment ions, speculate that their dissociation channels. Calculated ionization potential and the appearance of the potential and experimental results in good agreement. The results show that the photo- Fracture reaction based.