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来自维基百科,自由的百科全书
痕量同位素是指在自然界中僅以極少的量(即痕量)存在的同位素,皆為半衰期較短的放射性同位素。自然界中的痕量同位素大多為長壽命的原始放射性同位素(如鈾-238、釷-232等)之衰變產物,或者是宇宙射線撞擊地球物質後的產物。[1][2][3]
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