| 1 | 低温金属环境中^198Au半衰期的测量显示文摘利用德国鲁尔大学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。 | 曾晟 T. Spillane F. Raiola C. Rolls | 2009 | 原子能科学技术2009，43，6： | 2 |
| 2 | Nuclear Astrophysics Experiments in Collaboration with Ruhr University显示文摘This paper reports on two nuclear astrophysics experiments performed in collaboration with Ruhr University. In a 12C+ 12C fusion reaction, the 12C(12C, α) 20Ne and 12C( 12C, p) 23Na reactions were studied in the energy range of E = 2.10 MeV to 4.75 MeV using γ-ray spectroscopy. The deduced astrophysical S(E) factor exhibited a new, strong resonance at E = 2.14 MeV, which lay at the high-energy tail of the Gamow peak. The resonance increased the reaction rate of the α-channel by a factor of five near T = 8 × 10~8K. The electron screening in d(d, p)t was studied for a series of deuterated metal, insulator and semiconductor targets. Compared with the measurements performed with a gaseous D2 target, a large effect was observed in most metals, while a comparatively small effect was found in the insulators and semiconductors. Subsequently the temperature dependence of the electron screening in the d(d, p)t reaction was studied for the deuterated metals Pt and Co. Enhanced electron screening decreased with increasing tempera-ture. These data represent the first observations of the temperature dependence of a nuclear cross section. | 曾晟 F. RAIOLA T. SPILLANE 连刚 王宝祥 颜胜权 C. ROLFS | 2012 | Plasma Science and Technology2012，14，6： | 0 |
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