共查询到20条相似文献,搜索用时 62 毫秒
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原子核跃迁几率理论计算和实验对比是分析描述原子核内部结构的主要手段之一。目前采用重离子核反应观测到^143Pm核(Z=61,N=82)高自旋能级结构:激发态最大能级达x=8397.6keV,对应自旋J=47/2(h=1)。利用核壳模型在计算^143Pm核能级结构及对应的自旋宇称基础上,系统地对其γ级联跃迁链以及纯E2跃迁进行了计算,并与实验数据进行对比。采用OXBASH程序的单粒子跃迁公式计算了^143Pm的跃迁几率。At present, the high spin state of ^143 Pm(Z = 61, N = 82) have been investigated. The level scheme of ^143Pm has been extended up to an excitation energy Ex = 8 397.6 keV and spin J =47/2( h = 1 ). Based on the nuclear shell model (NSM), we have calculated the sequences of γ-ray transition rates and the pure E2 reduced transition probabilities of ^143Pm, and compared with experimental data. The formula of single-particle transition probability in the OXBASH code was applied in this paper. 相似文献
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通过熔合蒸发反应^129Te(^19F,4nγ)布居了^143Pm的高自旋态,利用在束γ谱学方法,对^143Pm的高自旋态核结构进行了研究,测量了γ射线单谱和γ-γ符合谱,并进行了γ射线各向异性以及DCO比率分析,建立了激发高能达10535.4keV的能级纲图,其中包括新发现的32条γ射线和17个新能级,用弱耦合模型对^143Pm的晕态能级结构进行了解释。 相似文献
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张玉虎 柳敏良G.deAngelis Zs.Podolyak 郭文涛 A.Gadea C.Ur N.Marginean C.Rusu R.Schwengner D.R.Napoli R.Menegazzo S.Lunardi D.Bazzacco T.Martinez M.Axiotis A.Gargano S.M.Lenzi F.Brandolini W.vonOertzen 《中国物理 C》2004,28(9):941-946
通过重离子融合蒸发反应^16O(^82Se 4n)^94Mo布局了^94Mo核的高自旋态.利用多探头探测器阵列GASP进行了在束γ测量,从而重新研究了^94Mo核的高自旋态能级结构.基于新发现的一些重要的连接跃迁,对^94Mo核的高自旋态能级纲图做了重要修改.将新的能级结构与壳模型计算进行了比较和讨论.结果表明要正确的描述^94Mo核的高自旋态(自旋值大于14)能级结构,应考虑价中子在d5/2,g7/2和h11/2轨道上的激发. 相似文献
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通过重离子熔合蒸发反应116Cd(27Al, 4n)布居了139Pm的高自旋激发态,用12台高纯锗探测器(HpGe)阵列进行了在束γ-γ 符合测量。 基于γ-γ符合关系及139Pm核已知的能级信息,建立了两条ΔI=1的负宇称带。 利用相邻核能级结构的系统性和依据半经典的核子-核子有效作用的理论模型(SPAC)对这两条带能级结构进行了定量计算, 认为它们属于磁转动带。 High spin states in 139Pm have been studied via the116Cd(27Al, 4n) heavy ion fusion evaporation reaction. The γ-γ coincidences were measured with 12 HpGe detectors. Based on γ-γ coincidence relationships and previously known levels in 139Pm, two ΔI=1 negative parity bands have been established. From the systematic comparison with the neighbouring nuclei and semi classical effective interaction model (SPAC) calculations, the two bands were suggested as magnetic rotational bands. 相似文献
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利用102MeV的^28Si束流,通过^60Ni(^28Si,2pn)熔合蒸发反应布居了^85Zr核的高自旋态,测量了γ-γ符合及DCO比值,建立了一个有43条能级,75条γ跃迁的能级纲图,新增加了36条γ跃迁,25条能级。将能级自旋推高到(49/2^ ),首次观察到了转边带的第二回弯。并确认了一条建立在17/2^-负字称带上的磁转动带。 相似文献
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The investigation was made of the dependence of the intensity of Tl, Ga, Mo, Mg, Mn, Sn, Bi, Ni, Zn, Pt and Au spectral lines and the plasma parameters (temperature T, electron concentration ne, degree of 6 ionnization α) from concentration of lithium additive. 相似文献
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Technical Physics - The object of this work is the apokamp—a new type of plasma jet, which is formed from a bright offshoot emerging at the bending point of a channel of a high-voltage... 相似文献
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