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报道了２５ＭｅＶ／ｕ４０Ａｒ＋１９７Ａｕ反应中从两粒子相对动量关联函数提取的发射时间随空间大小演化的规律．结果表明，即使发射源质量数减小５０％，对计算的关联函数及提取的发射时间影响仍然很小．在短发射时间（τ≤１００ｆｍ／ｃ）情况下，较小的核物质密度，导致提取的发射时间变小．因此，在正常核物质密度参数下提取的τ值可作为发射时间的上限值．在长发射时间（τ≥３００ｆｍ／ｃ）情况下发射时间不随空间大小变化，提取的τ即为实际的发射时间．
This paper reports the law of the evolution of the emission time of the 25MeV / u40Ar + 197Au reaction extracted from the correlation function of relative momentum of two particles with space. The results show that even if the mass of the emitter is reduced by 50%, the impact on the calculated correlation function and the extracted launch time is still small. In the case of short emission times (τ ≤ 100 fm / c), the smaller density of the core material leads to a smaller emission time for the extraction. Therefore, the τ value extracted under the normal nuclear material density parameter can be used as the upper limit of the emission time. In the long launch time (τ ≥ 300fm / c) the launch time does not vary with the space size, the extracted τ is the actual launch time.