Apoptosis-inducing activity of trihaloacetylazulenes against human oral tumor cell lines

The International Institute of Anticancer Researc

Inhibition of NO production in LPS-stimulated mouse macrophage-like cells by trihaloacetylazulenes

The International Institute of Anticancer Researc

对质子滴线核~（19）Na的β延迟质子衰变的首次观察

由（２０）Ｎｅ（Ｐ，２ｎ）（１９）Ｎａ反应，对质子滴线核（１９）Ｎａ进行了研究，实验在中国科学院高能物理研究所质子直线加速器上进行，首次观察到了（１９）Ｎａ的β延迟质子衰变，测定其质子能量为１．１０±０．０８ＭｅＶ，半衰期为４７±２０ｍｓ，它相应于（１９）Ｎａ基态到（１９）Ｎｅ的７．６２ＭｅＶ、Ｔ＝３／２同位旋相似态的超允许β跃迁和由此态到（１８）Ｆ基态的级联质子衰变．Na, a nuclide on proton drip line, was studied by (20)Ne(p,2n) (19)Na reaction.Experiment was performed on the proton linear accelerator at institute of High Energy Physics, The Chinese Academy of Sciences. The new decay mode of β-delayed proton decay was observed for the first time. The half-life of (19)Na was determined to be 47±20ms and its proton energy was measured to be 1.10±0.08MeV which is corresponding to super-allowed beta transition of (19)Na to excited state of 7.62MeV,the isospin analog state w...国家自然科学基

新缺中子同位素~(235)Am的分离和鉴别

新缺中子同位素２３５Ａｍ的分离和鉴别杨维凡郭俊盛牟万统甘再国方克明石立军刘洪业郭天瑞沈水法袁双贵张学谦秦芝马瑞昌钟纪泉（中国科学院近代物理研究所）王书鸿孔登明乔际民（中国科学院高能物理研究所）关键词缺中子同位素反冲传输装置化学分离半衰期１９５２年美...国家自然科学基金,中国科学院的双重资

新同位素235Am的产生与鉴别

一种缺中子新同位素２３５Ａｍ通过２３８Ｐｕ（ｐ，４ｎ）２３５Ａｍ反应而产生．产物借助Ｈｅ－ｊｅｔ系统的传输，快化学分离以及γ、Ｘ射线和γ－Ｘ（γ）符合测量等得到鉴别，测得其半衰期为１５±５ｍｉｎ

超铀区缺中子新同位素~（235）Am的合成与鉴别

用３５ＭｅＶ质子轰击同位素靶２３８Ｐｕ，通过２３８Ｐｕ（Ｐ，４ｎ）２３５Ａｍ反应，合成了新的缺中子同位素２３５Ａｍ．利用Ｈｅ－ｊｅｔ及毛细管传输技术收集反应产物，然后用放射化学法除去产物中的裂变碎片并分离出Ａｍ活性．根据观测到的２３５Ｐｕ的衰变Ｙ及ＮＰ的特征Ｘ射线的生长－衰变行为和Ｘ－Ｙ符合测量，肯定了２３５Ａｍ的首次合成，测得２３５Ａｍ的半衰期为１５±５ｍｉｎ．A new neutron-deficient isotope 235Am was synthesized in the reaction of 238Pu (p, 4n) 235Am by using 35MeV proton bombarding 235pu target. The Products were transported by the He-jet system. The Am was seperated from the reaction products using radiochemistry method. The y-ray of 23pu and X-ray of Np following EC decay of 235Am were observed. Based on the growth-decay cruve of X-ray of Np and the X-y coincidence measurements, the synthesis of 235Am was confirmed for the first time. The measured halflife of.国家自然科学基金，中国科学院资