Some Electromagnetic Transition Properties of Odd-A Europium Isotopes

In this work, we analyze the positive parity of states of odd-A Eu isotopes within the framework of interacting boson fermion model （IBFM-1）. The result of an IBFM-1 multilevel calculation with the 3s1/2, 2d3/2, 2d5/2, and 1g7/2 single panicle orbits is reported for the positive parity states of the odd-A Eu isotopes. A/so, an IBM-1 calculation is presented for the low-lying states in the even-even 152-154Sm core nucleus. The energy levels and B（E2） transition probabilities are calculated and compared with the experimental data. It is found that the calculated positive parity low spin state energy spectra of the odd-A Eu isotopes agree quite well with the experimental data.     

1,3-二烷基咪唑啉/Pd催化卤代芳烃的Heck和Suzuki反应

合成并表征了一种新型的有空间需求的N-杂环卡宾前驱体 1,3-二烷基咪唑啉盐. 这些咪唑啉盐与乙酸钯结合形成的高活性催化剂,可在温和条件下催化氯代和溴代芳烃的He ck和Suzuki交叉偶联反应.