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The level structure in neutron-deficient nucleus 91Ru was investigated via the 58Ni(36Ar,2 plnγ)Ru reaction at a beam energy of 111 MeV.Charged particles,neutrons,and y-rays were emitted in this reaction and detected by the DIAMANT CsI ball,Neutron Wall,and the EXOGAM Ge clover array,respectively.In addition to the previously reported levels in 91Ru,new low-to-medium spin states were observed.Angular correlation and linear polarization measurements were performed to unambiguously determine spins and parities of the excited states in 91 Ru.The low-spin states of 91 Ru exhibit a scheme of multi-quasiparticle excitations,which is very similar to that of the neighboring N=47 isotone.These excitations have been interpreted in terms of the shell model.The calculations performed in the configuration space(p3/2,f5/2,p1/2,g9/2)reproduce the experimental excitation energies reasonably well,supporting the interpretation of the newly assigned positive-parity states in terms of the three quasiparticle configurationsπ(g9/2)^-2v(g9/2^-1 and v(g9/2)^-3. 相似文献
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随着现代电力电子技术的不断发展,大量高精度电子设备出现,这些设备的稳定运行都离不开高品质直流稳压电源的支持。基于MSP430单片机设计并实现了一款数控直流稳压电源,该电源由单片机控制电路、稳压输出电路、液晶显示电路、辅助电源电路等组成。可通过按键实现输出电压的预置,并通过液晶显示,输出电压在0V~20V之间可调,通过“+”“-”两键操作,电压最小步进值为0.1V,可根据实际需求设置输出电压值。该电源带负载能力强,具有过流过压保护功能,并且具有精度高、稳定性好,线路简单等特点 相似文献
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To obtain a quantitative understanding of the influence of temperature on the performance of multi-gap resistive plate chambers (MRPCs), we have tested the performance of a 10-gap, 12-pad, 2×2×12 cm2 active area MRPC at different temperatures with cosmic rays. Presented are results from measurements of high-voltage scans, noise rate, dark current, streamer, time resolution, count rate, charge spectrum, and detection efficiency. The test results show that the MRPC performance is significantly affected by temperature arising from the temperature-dependence of the glass resistivity. 相似文献
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由于受国内资本市场的限制以及资金匮乏的影响,民营企业的发展受到严重制约,为此很多民企选择境外上市。但目前,这条路也越来越受到限制。 相似文献
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本文采用经典Claisen酮酯缩合法,合成了一种新型双官能团配体6-对甲基苯甲酰乙酰基-2-吡啶甲酸(H2L),通过红外光谱、核磁共振谱和质谱对其结构进行了表征。以H2L为配体合成了铕的二元配合物和1,10-菲咯啉为第二配体的三元配合物,并通过红外光谱、差热热重分析、荧光光谱对配合物进行了表征及其发光性质研究。结果表明:所有配合物均能发射铕(Ⅲ)的特征光谱,最强发射峰在615nm左右,配体极好地敏化了稀土离子的发光。第二配体的引入使三元配合物的荧光强度明显大于二元配合物的荧光强度。 相似文献