在化学教学中联系工、农业生产的初步经验

我校自1955年起在理化各科中贯彻综合技术教育,注意教学与工、农业生产相结合,现在把在本县尽可能做到的一些工作初步总结出来,介绍如下,希望同志们批评指导。(一)在化学课堂教学中必须和农业生产的实际相结合党在前年公布了1956—1967年农业发展纲要40条(草案)后,使我们担负着更重大的任务就是在化学教学中不仅要联系现代工业生产实际,而且还要跟农业生产的实际相结合。二年多来,我们在讲授化学产品和化学规律在农业生产上的应用,灌输给学生以农业化学化的基础知识和技能方面、也是比较注意的;例如在初三和高一讲百分比浓度时要求学生配制了选种     

Signature splitting of the πh11/2 band and high-spin structures in 155Tb

Seven experimentally observed bands of 155Tb are analyzed in detail,using the particle-number-conserving method for treating the cranked shell model with monopole and quadrupole pairing interactions.We satisfactorily reproduce the experimental alignments and especially focus on the microscopic mechanism of the second back-bending and the influence of pair interaction on ultrahigh spins.Our calculated results show that the πi13/2 orbitals are too high to give a contribution to the moment of inertia below ω≈ 0.7 MeV.Instead,the crossing between the π[541]1/2 and other proton orbitals is responsible for the second back-bending.We assign a possible configuration to the decoupled band found in 155Tb and predict eleven bands which are experimentally unobserved.