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1.
根据TRS理论计算了36个原子核的位能面,并预言了一组三轴超形变原子核  相似文献   

2.
采用二维TRS方法研究了161Lu原子核中新发现的一条强布居带X2的三轴超形变特性,从理论上得到一组平衡形变值,证实其存在三轴超形变.通过分析组成总位能面的各部分能量,指出形成这条具有正宇称的三轴超形变带的微观机制:主要是中子壳修正能的作用,同时转动能和高j闯入轨道的形变驱动效应,尤其是质子i13/2和中子i13/2准粒子也起到了重要的作用.  相似文献   

3.
采用二维TRS方法研究了161^Lu原子核中新发现的一条强布居带X2的三轴超形变特性,从理论上得到一组平衡形变值,证实其存在三轴超形变.通过分析组成总位能面的各部分能量,指出形成这条具有正宇称的三轴超形变带的微观机制:主要是中子壳修正能的作用,同时转动能和高j闯入轨道的形变驱动效应,尤其是质子i13/2和中子i13/2准粒子也起到了重要的作用.  相似文献   

4.
从Davydov-Filippov的非轴对称转子模型出发,考虑三轴γ形变较小,用微扰方法,给出了原子核转动谱的新公式,拟合了锕系和稀土区偶偶核基带转动谱以及190区偶A核超形变(SD)带的E2跃迁谱。结果显示,根据Davydov-Filippov模型导出的转动谱公式,不仅较好地再现了锕系和稀土区偶偶核基带的转动谱以及190区偶A核SD带的E2跃迁谱,而且能够给出具有明显物理意义的四极形变β和非轴对称度γ参数。  相似文献   

5.
在相互作用玻色子模型下,提出了SU(3)对称+具有SU(5)对称微扰的模型,并给出了一个四参数能谱公式利用该公式较好地描述了超形变带的Eγ谱、动力学转动惯量随转动频率的变化以及ΔI=4分岔现象,还将该方案推广到超对称情况,并考虑单粒子能级的影响,定量描述了一些全同超形变带  相似文献   

6.
用推转双心壳模型研究了巨超形变核的形状,及在WKB近似下处于高自旋巨超形变态的核的自发裂变寿命。理论计算结果表明,除存在超形变态外,还存在一个稳定的巨超形变态,核形状为哑铃型,其长短轴之比约为3:1,预言了A-150区可能存在大巨超形变核,如^14462Sm,其长短轴之比约为4:1,而且这些大巨超形变核可能会构成大巨超形变同位素链,如^140,142,144,62Sm。在^144 62Sm巨超形变  相似文献   

7.
190区超形变核态的形变参数分析   总被引:2,自引:0,他引:2  
将DavydovFilippov的非轴对称转子模型推广到超形变核态,给出了一个新的超形变带的转动谱公式;并应用该公式,确定了190区偶A核超形变带的带首自旋;将轴对称四极形变β和非轴对称度γ参数与正常形变带作了比较.结果表明:前者比正常形变核态大得多,而γ形变虽然普遍较小,但对能谱有重要的影响  相似文献   

8.
相对论对称性在原子核的壳层结构及其演化中扮演重要角色.探讨超形变核态的相对论对称性,利用相对论平均场理论计算超形变核态的结合能、单粒子能级,提取单粒子能级的自旋和赝自旋能量劈裂,分析这些能量劈裂与原子核形变及自旋和赝自旋双重态量子数间的关系,进而研究超形变核态的自旋和赝自旋对称性及其随形变变化的规律,结果表明超形变核态的自旋和赝自旋对称性与双重态量子数和形变都相关.  相似文献   

9.
^86Zr及稀土区三轴超形变带自旋值的评估   总被引:1,自引:0,他引:1  
利用Becker等人的角动量与转动频率的二参量公式和吴崇试,曾谨言的二参量转动谱公式,分别对^86Zr的SD1,SD2,SD4,^163,165,167Lu以及^171Ta,^173Re的三轴超形变带作最小二乘法拟合,并对以上各三轴超形变带的自旋值作了评估。  相似文献   

10.
本文讨论了超重核^288 114的超形变带的相关性质,发现了^288 114核的四极形变、γ形变、运动学转动惯量、动力学转动惯量、均方根半径以及转动能量随核总自旋的变化关系,为实验上研究超重核提供理论参考。  相似文献   

11.
利用 Davydov - Filippov 模型导出的转动谱公式,分析了190 区偶- 偶 Hg , Pb 和 Po 同位素的 E2 跃迁谱,得到了四极形变β和非轴对称度γ参数,结果表明:偶- 偶 Hg , Pb 和 Po 同位素的四极形变是主要的,非轴对称度γ形变也对能谱产生了重要的影响。  相似文献   

12.

利用Davydov-Filippov模型导出的转动谱公式,分析了190区偶-偶Hg,Pb和Po同位素的E2跃迁谱,得到了四极形变β和非轴对称度γ参数,结果表明:偶-偶Hh,Pb和Po同位素的四极形变是主要的,非轴对称度γ形变也对能谱产生了重要的影响.
  相似文献   

13.
计算了基于变形Woods Saxon势的单粒子能谱 ,并与基于Skyrme力的自洽Hartree Fock计算结果进行了比较 .2种截然不同的方式得到的单粒子能谱总体上表现出非常的相似 ,特别是它们能得到相同的超形变特征能隙 .计算出的动力学转动惯量也均具有与实验结果相同的趋势 ,但比实验结果整体偏大 ,因而须进一步优化原子核相互作用势参数  相似文献   

14.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

15.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

16.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

17.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

18.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

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