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197Au were irradiated with 47 MeV/u 12C ions. Iridium was produced via the multinucleon transfer reactions in bombardments of 197Au with 12C. and was separated radiochemically from Au and the mixture of the reaction products. The γ radioactivities of Ir isotopes were measured by using a HPGe detector. The production cross sections of Ir isotopes were determined from activities of Ir isotopes at the end of bombardment and the other relative data. It has been found that the cross sections for neutron-rich isotopes of iridium show an exponential dependence on the values of Qgg. Our experimental results also demonstrate lack of correlation between the cross sections and Qgg in the case of neutron-deficient isotopes of iridium. The fact can be explained from that neutron-rich isotopes of iridium were produced in the deep inelastic transfer reactions. 相似文献
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本文简述在中科院近物所HIRFL上发现的第一个新核素208Hg的合成和鉴别,兼论利用HIRFL提供的中能重离子束开展远离β稳定线核素合成和衰变研究的优势、困难以及拟采用的物理和技术路线。 The synthesis and identification of the first discovered new nuclide 208Hg on HIRFL(Heavy Ion Research Facility of Lanzhou) were described. In this paper the superiorities, difficultiesas well as the physical and technical line about the synthesis and decay study for the nuclides far fromβ-stability line to be made at HIRFL were discussed. 相似文献
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以~(64)Zn(~(12)C,2np)~(73)Br反应得到~(73)Br,经过氦喷嘴传输系统和快速化学分离后进行了γ单谱、γ-γ,符合和角关联测量,得到了~(73)Br的27条γ射线能量和相对强度,其中102.1、137.2、166.2、249.0、345.5、363.8、381.5、385.7和390.2keV9条γ射线以及192.4、537.4和574.1keV 3条能级为本工作首次测得.建立了~(73)Br的衰变纲图,由logft值和角关联系数测量值推测了90.4keV能级的自旋. 相似文献
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报道了利用兰州重离子研究装置提供的26Mg重离子束流轰击243Am靶产生和鉴别已知超重核素266Bh的实验结果。利用转轮收集探测装置依靠母子核遗传关系通过观测Bh同位素与其子核Db和Lr之间的α-α关联事件来鉴别266Bh。实验中观测到266Bh的α能量为(9.03 ± 0.08)MeV, 与日本理化学研究所在合成113号元素中第一个衰变链中观测到266Bh的α能量为9.07 MeV相近。 266Bh的半衰期为0.66+0.59-0.26 s, 从实验得到的Qα也符合Z=107的Qα随中子数变化的系统性。The isotope of 266Bh was produced and identified definitely in bombardments of 243Am target with 162 MeV 26Mg ions at HIRFL. Identification was made by observation of correlated α particle decays between the Bh isotopes and their Db and Lr daughters using a rotating wheel system. The measured α energy for 266Bh is (9.03±0.08) MeV, and this value close to the 9.07 MeV for 266Bh observed in the first chain of element 113 at RIKEN. The half life of 266Bh is 0.66+0.59 -0.26 s. The Qα value derived from this experiment fits well into the general trend in a “Qα N systematics” for the isotopes with Z = 107. 相似文献