排序方式: 共有77条查询结果,搜索用时 171 毫秒
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张玉虎 M.Oshima T.Morikawa T.Hayakawa Y.Toh 周小红 何建军 刘忠 甘再国 T.Shizuma M.Koizumi A.Osa J.Katakura Y.Hatsukawa M.Matsuda N.Shinohara T.Ishii H.Kusakari M.Sugawara K.Furuno T.Komatsubara T.Une 温书贤 竺礼华 王治民 许甫荣 《中国物理 C》2003,(4)
利用重离子熔合蒸发反应和在束γ谱学实验方法研究了双奇核176,178Ir和182 Au的高自旋态结构 ,在这 3个双奇核中观测到了基于πi13 2 νi13 2 准粒子组态下的转动带 .以能级间隔系统学为判据 ,对184Au核中πi13 2 νi13 2 转动带能级自旋进行了指定 .指出176,178Ir和182 ,184Au 4个双奇核的πi13 2 νi13 2 转动带在低自旋区均出现旋称反转 .对πi13 2 νi13 2 转动带旋称反转现象进行了定性的讨论 .用推转壳模型对πh9 2 νi13 2 带和πi13 2 νi13 2 带能级结构进行了理论研究 ,发现当采用形变和对力自洽计算后 ,从理论上可以定性地解释两个半退耦带出现的旋称反转现象 相似文献
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厚度相差很大的光学零件,加工时应力容易集中到最薄的地方,对零件的加工存在着很大困难,针对所加工零件的特点选择正确的加工方案至关重要。采用浇注刚性补偿法加工中心厚度与边缘厚度比值为2.7:13,且不对称的特殊光学零件,取得了较好的效果。 相似文献
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The thermonuclear~(19)F(p,α_0)16O reaction rate in the temperature region 0.007–10 GK has been derived by re-evaluating the available experimental data, together with the low-energy theoretical R-matrix extrapolations.Our new rate deviates by up to about 30% compared to the previous results, although all rates are consistent within the uncertainties. At very low temperature(e.g. 0.01 GK) our reaction rate is about 20% lower than the most recently published rate, because of a difference in the low energy extrapolated S-factor and a more accurate estimate of the reduced mass used in the calculation of the reaction rate. At temperatures above ~1 GK, our rate is lower, for instance, by about 20% around 1.75 GK, because we have re-evaluated the previous data(Isoya et al., Nucl. Phys.7, 116(1958)) in a meticulous way. The present interpretation is supported by the direct experimental data. The uncertainties of the present evaluated rate are estimated to be about 20% in the temperature region below 0.2 GK,and are mainly caused by the lack of low-energy experimental data and the large uncertainties in the existing data.Asymptotic giant branch(AGB) stars evolve at temperatures below 0.2 GK, where the~(19)F(p,α)16O reaction may play a very important role. However, the current accuracy of the reaction rate is insufficient to help to describe, in a careful way, the fluorine over-abundances observed in AGB stars. Precise cross section(or S factor) data in the low energy region are therefore needed for astrophysical nucleosynthesis studies. 相似文献
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Fluorescein ethyl ester as a model and four dyads of Fluorescein and Anthroic acid linked with different length spacer were synthesized and characterized. They were put in bilayer membrane and on SnO2 coated substrate, The photoinduced voltaic responses were observed and compared when fluorescein was excited using visible light. It was found that the dyads have higher responses than the model, and the dyad with a butylene spacer (n=4) has the highest response. The results and related mechanisms were discussed. 相似文献
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张玉虎 周小红 何建军 刘忠 方永得 郭文涛 雷祥国 郭应祥 马龙 M.Moyo Ndontchueng M.Oshima Y.Toh M.Koizumi A.Osa A.Kimura Y. 《中国物理 C》2006,30(Z2):208-210
为了搜寻182Au, 184Au,186Au核中πi13/2⊙νi13/2转动带的旋称反转, 我们通过152Sm(35Cl,5n)182Au,171Yb(19F,4n)186Au和159Tb(29Si,4n)184Au反应对182Au,184Au, 186Au核进行了在束γ谱学研究. 本工作扩展了这3个核πi13/2⊙νi13/2带的能级纲图, 特别是确定了184Au核πi13/2⊙νi13/2带的能级自旋宇称, 发现了低自旋旋称反转现象. 相似文献
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张玉虎 M.Oshima T.Morikawa T.Hayakawa Y.Toh 周小红 何建军 刘忠 甘再国 T.Shizuma M.Koizumi A.Osa J.Katakura Y.Hatsukawa M.Matsuda< sup 《中国物理 C》2003,27(4):313-318
利用重离子熔合蒸发反应和在束γ谱学实验方法研究了双奇核176,178Ir和182Au的高自旋态结构,在这3个双奇核中观测到了基于πi13/2 νi13/2准粒子组态下的转动带.以能级间隔系统学为判据,对184Au核中πi13/2 νi13/2转动带能级自旋进行了指定.指出176,178Ir和182,184Au 4个双奇核的πi13/2 νi13/2转动带在低自旋区均出现旋称反转.对πi13/2 νi13/2转动带旋称反转现象进行了定性的讨论.用推转壳模型对πh9/2 νi13/2带和πi13/2 νi13/2带能级结构进行了理论研究,发现当采用形变和对力自洽计算后,从理论上可以定性地解释两个半退耦带出现的旋称反转现象. 相似文献