排序方式: 共有90条查询结果,搜索用时 156 毫秒
71.
张昕 张玉虎 周小红 郭文涛 郭松 郭应祥 M.Oshima Y.Toh M.Koizimi A.Osa A.Kimura Y.Hatsukawa T.Morikawa M.Nakamura M.Sugawara H.Kusakari T.Komatsubara K.Furuno 《原子核物理评论》2010,27(1):32-37
对149Sm(27Al, 4n)172Re反应产生的172Re在束γ的实验数据进行了重新分析, 新发现了可归属于172Re的3个转动带, 由此建立了由6个转动带构成的172Re高自旋态能级纲图。依据相邻核的带结构知识和推转壳模型分析方法, 对新发现的3个转动带的准粒子组态进行了指定, 讨论了它们的转动特征。We have re analyzed the experimental data of in beam γ spectroscopy for 172Re via the 149Sm(27Al, 4n)172Re reaction. Three rotational bands have been newly found and assigned to 172Re. A new level scheme of 172Re, consisting of 6 bands, is thus presented. Based on the existing knowlegde from the neighboring nuclei and the cranked shell model, the quasiparticle configurtions have been assigned to the 3 newly observed bands and their structure properties have been dicussed. 相似文献
72.
对双奇核174Re的在束γ谱学实验数据作了仔细分析, 提取出了带间与带内E2 γ跃迁分支比, 并导出了其约化跃迁概率的比值。用带混合理论对约化跃迁概率的比值进行了分析, 得到带间相互作用强度及转动带形变的信息。发现不同组态的转动带其跃迁电四极矩具有明显的差异。与相邻奇A核的结构特征类似,这种跃迁电四极矩的差异很可能是由于1/2-[541]准质子或1/2-[521] 准中子对原子核的形状驱动效应造成的。 By analyzing carefully the in beam γ spectroscopy data of odd-odd 174Re, we have extracted the branching ratios of the interband and intraband E2 γ transitions from the two rotational bands of different configurations in 174Re.The ratios of the reduced transition probabilities B(E2) have been deduced and analyzed using a band mixing theory. Information on the band interaction and deformation have been obtained. Apparent differences of transition quadrupole moments are found in the two configurations. A likely reason for the differences in the transition quadrupole moments is the shape driving effects of 1/2-[541] quasi proton or 1/2-[521] quasi neutron, which has been proposed in the oddA neighbors of 174Re. 相似文献
73.
宋立涛 周小红 张玉虎 郭应祥 雷相国 郑勇 柳敏良 G.de Angelis N.Marginean A.Gadea D.R.Napoli M.Axiotis C.Rusu T.Martinez 《中国物理 C》2005,29(8):736-740
通过重离子熔合蒸发反应和在束核谱学实验方法研究了奇A 核183Au的高自旋态能级结构. 扩展并更新了183Au的能级纲图. 首次建立了183Au的πi13/2转动带的能量非优先带. 分析并讨论了183Au中πh9/2转动带的能量非优先带和πf7/2转动带间的相互作用. 相似文献
74.
利用能量为170MeV的35Cl束流,通过157Gd(35Cl,4n)熔合蒸发反应研究了188Tl的高自旋态能级结构.依据实验结果建立了188Tl基于πh9/2(○×)νi13/2组态的转动带.根据双奇Tl核能级结构的相似性,指定了188Tlπh9/2(○×)νi13/2扁椭球转动带的自旋值.结果表明在188Tl中,πh9/2(○×)νi13/2扁椭球转动带在低自旋区具有旋称反转性质.利用包含了质子-中子剩余相互作用的准粒子-转子模型,定性地解释了πh9/2(○×)νi13/2扁椭球转动带的低自旋区旋称反转现象. 相似文献
75.
王华磊 张玉虎 周小红 郭应祥 雷祥国 徐树威 谢元祥 郑勇 柳敏良 邢烨炳 谢成营 宋立涛 郭文涛 T.Hayakawa M.Oshima Y.Toh J.Katakura Y.Hatssukawa M.Matsuda N.Shinohara T.Ishii H.Kusakari M.Sugawara T.Komatsubara 《原子核物理评论》2006,23(1):13-17
利用在束实验产生具有β^+/EC衰变性质核素^176,178Ir,分析了在柬实验条件下获得的γ—γ符合数据,识别出了^176Os的4条新能级和13条新γ跃迁、^178Os的5条新能级和14条新γ跃迁。籍助氨喷嘴快速带传输系统,进一步对^176Ir的β’/EC衰变进行了测量,在确认在束测量新γ射线的同时建议了^176Ir的一个低自旋同核异能态。通过两准粒子耦舍的半经验计算,建议了^176,178Ir基态及同核异能态的组态。The γ rays following the β^+/EC decay of ^176. 178Ir nuclei have been investigated using in-beam γ- ray experiment. A total of 4 new levels, 13 new γ transitions of ^176Os and 5 new levels, 14 new γ transitions of ^178Os were identified. In addition, with the aid of a helium-jet recoil fast tape transport system, the β^+/EC decay of ^176Ir was further studied, the above new γ rays were proved and an isomer was proposed in ^176Ir. By the semiempirical calculations of two-quasiparticle intrinsic states of odd-odd nuclei, the configurations of ground states and isomeric states were also proposed for ^176, 178Ir 相似文献
76.
The β+/EC decay of doubly odd nucleus ^176Ir has been studied via the ^146Nd(^35Cl, 5n7) heavy ion fusion evaporation reaction at 210MeV bombarding energy. With the aid of a helium-jet recoil fast tape transport system, the reaction products were transported to a low-background location for measurement. Based on the data analysis, the previously known γ rays from the decay of ^176Ir are proven. Moreover, three new excited levels and ten new γ rays are assigned to ^176Os. The time spectra of typical γ rays clearly indicate a long-lived low-spin isomer in ^176Ir. 相似文献
77.
骆鹏 张玉虎 周小红 柳敏良 郭应祥 刘忠 雷相国 宋立涛 郑勇 王华磊 于海萍 谢成营 马英君 Y.Sasaki K.Yamada H.Ohshima 《中国物理 C》2004,28(5):495-501
利用在束γ谱实验技术,通过128Te(10B,3n)135La反应研究了135La的高自旋态.基于γγ符合关系、γ射线的相对强度和各向异性度的测量结果,建立了135La的能级纲图.在hω≈0.40MeV附近,观测到基于πh11/2质子轨道上的负宇称带的带交叉.比较N=78同中子素链能级结构的系统性,认为该带交叉是由一对h11/2准质子发生转动顺排造成的.在高自旋态处,观测到具有很强M1跃迁、Signature劈裂很小的ΔI=1负宇称带,根据系统性认为该带是建立在πh11/2(νh11/2)2组态上的γ≈–60°的扁椭球形变带. 相似文献
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79.
在166MeV的束流能量下,利用重离子熔合蒸发反应142Nd(32S, 1p3nγ) 170Re布居了170Re的高自旋激发态. 用12套带BGO反康普顿抑制的高纯锗探测器阵列进行了在束X-γ和γ-γ符合测量. 基于对实验测量结果及周围邻近核已知信息的综合分析,首次建立了双奇核170Re的转动带能级纲图. 根据实验提取出的准粒子顺排、旋称劈裂等结构特征和Re双奇核同位素带结构系统学知识的比较分析,指出该带的准粒子组态是πh11/2(○×)υi13/2. 相似文献
80.