Explinks免费双光子吸收计算器，精确计算激光源下每分子双光子激发数。提供双光子吸收公式详解和示例计算，适用于光学研究、激光物理等领域的双光子激发率分析。
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"americaHotValueDouble": 0,
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"selectedValueDouble": 791,
"chinaHotValueDouble": 0,
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免费在线半衰期计算器，精确计算放射性物质的半衰期、初始量、最终量和衰变常数。广泛应用于辐射碳定年、核物理研究等领域，提供专业的放射性衰变计算服务。
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