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NUCLEAR PHYSICS RESEARCH LABORATORY 《中国物理C(英文版)》1977,1(1):65-69
Since the middle of 1972,we have been carrying out a research programme in the field of heavy ion physics.A series of preliminary experiments have been done.Some typical examples are illustrated in this paper. 相似文献
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本文研究了用四氟化碳-氧等离子体进行干法显影的电子束刻蚀技术。负型电子束抗蚀剂是由聚环己烯砜和2,6-双-(4'-叠氮苯亚甲基)-4-甲基环己酮组成,其灵敏度为1.5×10-5C/cm2,分辨率小于1μm,反差约1.43。并讨论了干法显影的影响因素和机理。 相似文献
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长征厂磁性材料车间磁学教研组热压铁氧体小组 《物理学报》1974,23(6):1-12
本文从实验上研究了起始粉料的制备方法和热压条件对磁头用的Mn-Zn及Ni-Zn热压铁氧体的密度、显微结构和磁性的影响。实验结果表明,化学共沉淀法制备的铁氧体粉料比氧化物法及硫酸盐法制备的要好。适当选择热压条件,可以获得晶粒分布均匀、晶粒大小不同(10μm—300μm)的高密度铁氧体;可以获得μ0=7420以及Bm=4950Gs的高密度Mn-Zn铁氧体和μ0等于100—2500的高密度Ni-Zn铁氧体。 相似文献
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本文对钕玻璃的光泵感应热畸变作了理论分析,给出了光泵感应热畸变与钕玻璃热光性质的关系,并对高重复率脉冲器件和单次脉冲器件作了热畸变的定量测量,实验结果在一定程度上与理论分析相符。 相似文献
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91.IntroductionTheso-calledWestwaterprocessisthecoordinateprocessunderthepolymermeasureu(g)in3-dimensionsconstructedbyWestwater(see[7,8]),andthepolymermeasurev(g)onCo([O,1]-R')isformallydefinedbywhereC,isthenormalization,gE[o,oo)isacouplingconstant,pistheWienermeasureonCo([o,11-R').Inarecentpaper(see[9]),weprovedthattheHausdorffdimensionofthesamplepathoftheWestwaterprocess{X,,t6[O,1]}isalsotwowithprobability1tou(g).Actually,weprovedin[9]thatgh(ImX)5C,y(g)-a.e.(1.1)m(ImX)5C,y(g)-a.e.(1.… 相似文献
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金属物理专业级二班断裂韧性组 《物理学报》1976,25(4):344-351
近几年来,为了解决弹塑性体的断裂判据,提出了“COD”方法和J积分方法等。用实验测量其临界值的关键是需要确切地判断裂纹开始扩展的开裂点。 目前已发展了多种方法(如声发射、电位法、柔度法和金相法)以确定开裂点。我们研究了一种比较能确切判断开裂点的电阻法。 相似文献
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ELEMENTARY PARTICLE THEORY GROUP DEPARTMENT OF PHYSICS PEKING UNIVERSITY 《中国物理C(英文版)》1977,1(1):19-36
In this paper,the color symmetry of stratons for a theoretical model proposed some times ago is investigated.This symmetry contains two kinds of transformations, the first is color gauge transformations which leave the color mumber of stratons conserved,the second is color permutations which indicate the equivaluence of dif- ferent color stratons.The structure of this symmetry group(S3α)is investigated.The irreducible representations(IR's)of S3α and the reduction of their direct product are given.The relation between IR's of S3α and those of color U(3)group is discussed. In a simplest physical model only two neutral vector gluons are needed and the super-strong ihteraetions among stratons exhibit saturation properties similar to but somewhat different from the case of the Han-Nambu model.Not only the color singlet, but also other color neutral states belonging to IR's 2 or 1 of S3α all belong to the lowest energy level of the super-strong interactions.If there were eight degenerate vector gluons belonging to IR's 2 and 6,the Han-Nambu model would be reproduced. 相似文献