\(^{238}_{92}U\underrightarrow{\left(1\right)}^{234}_{90}Th+^4_2He\underrightarrow{\left(2\right)}^{234}_{91}Pa+^0_{-1}e\underrightarrow{\left(3\right)}2\alpha+^{226}_{87}Fr\underrightarrow{\left(4\right)}\alpha+^{222}_{85}At\)
(1) Phóng xạ \(\alpha\): \(^{238}_{92}U\rightarrow^4_2He+^{234}_{90}Th\)
(2) Phóng xạ \(\beta^-\): \(^{234}_{90}Th\rightarrow^{234}_{91}Pa+^0_{-1}e\)
(3) Phóng xạ \(\alpha\): \(^{234}_{91}Pa\rightarrow2\alpha+^{226}_{87}Fr\)
(4) Phóng xạ \(\alpha\): \(^{226}_{87}Fr\rightarrow^4_2He+^{222}_{85}At\)