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Question

Find whether α- decay or any of the β decay are allowed for 22689Ac. Given masses are:
M(22689Ac)=226.028356amu
M(22287Fr)=222.017415amu
M(22690Th)=226.017388amu
M(22688Ra)=226.025406amu
M(42He)=4.002603amu

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