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![Zum [beta]-Zerfall des natürlichen Actiniums](data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22180%22%20height%3D%22270%22%3E%3Crect%20width%3D%22180%22%20height%3D%22270%22%20fill%3D%22%231a1a2e%22%2F%3E%3Ctext%20x%3D%2290%22%20y%3D%22140%22%20text-anchor%3D%22middle%22%20fill%3D%22%238b5cf6%22%20font-size%3D%2214%22%3ENo%20Cover%3C%2Ftext%3E%3C%2Fsvg%3E)