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中文摘要：
利用德国鲁尔大学DTL实验室的中子源,通过^197Au（n,γ）^198Au反应得到^198Au@Au样品,在室温（T=293 K）和低温（T=12 K）条件下交替测量金属Au环境中^198Au的412 keV特征γ射线,通过分析得到不同温度下^198Au的半衰期。实验结果表明,与文献值T1/2=（2.694 3±0.000 8）d相比,T=293 K时198Au的半衰期变长（0.4±0.7）%;T=12 K时变长（4.0±0.7）%。这一变化趋向与德拜等离子体模型的预言相符,但其幅度显著小于模型的估计值。
英文摘要：
The ^198Au@Au sample was produced via ^197Au（n,γ）^198Au reaction. The relative activities of 412 keV characteristic γ-ray from the ^198Au@Au sample were measured at room temperature T=293 K and low temperature T= 12 K, alternately. The β^- - decay half-life of ^198Au in Au metallic environment was observed to be longer by （0.4±0.7）% at T=293 K and by （4.0±0.7）% when the metal was cooled to T= 12 K, both compared to the literature value of T1/2 = （2. 694 3±0. 000 8） d. The result is consistent qualitatively with, but clearly lower than, the prediction of the Debye plasma model.
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