共查询到20条相似文献,搜索用时 140 毫秒
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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
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利用在束γ谱学技术和173Yb(18O, 4n)熔合蒸发反应研究了187Pt的高自旋态能级结构. 建立了包括3个转动带的187Pt高自旋态能级纲图. 基于187Pt周围核结构的系统学和比较带内B(M1)/B(E2)比率的实验值和理论值, 建议上述3个转动带的组态
分别为11/2+[615], 7/2-[503]和1/2-[521]. 对各转动带的带交叉频率、顺排增益、旋称劈裂等进行了讨论. 相似文献
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利用重离子熔合蒸发反应149Sm(27Al,4nγ)172Re布居了形变双奇核172Re的高自旋态,用12套带有BGO反康普顿抑制的高纯锗探测器阵列进行了在束γ实验测量,首次建立了形变双奇核172Re由3个转动带构成的高自旋态能级纲图.研究和讨论了3个转动带的结构特征,基于已有的高自旋态核结构知识并通过系统学比较和分析指出它们的准粒子组态分别为πh11/2⊙νi13/2,πh9/2⊙νi13/2和π1/2-[541]⊙ν1/2-[521].发现前两个转动带在自旋小于18.5h时其转动能级呈现反常的旋称劈裂. 相似文献
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形变双奇核178Ir转动带能级的旋称反转 总被引:1,自引:0,他引:1
张玉虎 T.Hayakawa M.Oshima Y.Toh J.Katakura Y.Hatsukawa M.Matsuda N.Shinohara T.Ishii H.Kusakari M.Sugawara T.Komatsubara 《中国物理 C》2000,24(12):1123-1130
利用152Sm(31P,5nγ)178Ir反应产生并研究了双奇核178Ir的高自旋态.实验中进行了178Ir核的在束γ测量,包括γ射线的激发函数测量、X–γ和γ–γ符合测量.首次建立了双奇核178Ir基于πh9/2νi13/2和πh11/2νi13/2准粒子组态上的转动带能级纲图.发现在低自旋区,两个转动带能级均出现旋称反转.对此核区半退耦带的旋称反转作了简要的分析和讨论. 相似文献
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肖树冬 朱胜江 杨利明 J.H.Hamilton A.V.Ramayya J.K.Hwang 张征 姜卓 车兴来 禹英男 I.Y.Lee J.O.Rasmussen W.C.Ma 《中国物理 C》2004,28(1):37-41
通过对252Cf自发裂变产生的瞬发γ射线的多重符合测量,对丰中子核116,118,120Cd的高自旋态进行了研究.实验是利用美国罗仑兹伯克利实验室的超级γ球探测装置进行的.118Cd的晕带自旋扩展到18h,而116,120Cd的晕带扩展到16h.利用推转壳模型对带结构进行了计算,对这几个核晕带很陡的回弯现象做了讨论.在每个核中观测到了5-和7-能级,对其特性进行了讨论.在118Cd中还观测到一个基于7-能级的准转动带 相似文献
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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×υi13/2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×υi13/2扁椭球转动带的自旋值. 结果表明在188Tl中, πh9/2×υi13/2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×υi13/2扁椭球转动带的低自旋区旋称反转现象. 相似文献
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WANG Lie-Lin WU Xiao-Guang ZHU Li-Hua LI Guang-Sheng HAO Xin ZHENG Yun HE Chuang-Ye WANG Lei LI Xue-Qin LIU Ying PAN Bo LI Zhong-Yu DING Huai-Bo 《中国物理C(英文版)》2009,33(Z1)
The level lifetimes in partner bands of 130Cs have been measured using the Doppler Shift Attenuation method. The high-spin states of 130Cs were populated via fusion evaporation reaction 124Sn(11B,5n)130Cs at a beam energy of 65 MeV. The absolute M1 and E2 transition probabilities have been deduced. The results indicate that the partner bands of 130Cs manifest the chiral properties. 相似文献
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通过重离子核反应与在束γ谱的实验技术,对A=130缺中子核区122Cs与134Ce核的高自旋态进行了研究,所用核反应分别为107Ag(19F,1p3n)与122Sn(16O,4n).实验结果扩展了122Cs与134Ce的能级纲图.在122Cs中发现可能是属于手征二重带的结构,而在134Ce核的高自旋态结构中呈现出重要的具有不同γ形变的形状共存特性.Through heavy ion nuclear reaction and in-beam γ-ray spectroscopy technique, the high spin states of neutron-deficient~(122)Cs and~(134)Ce nuclei in A=130 region have been studied. The~(107)Ag(~(19)F, 1p3n) and~(122)Sn(~(16)O, 4n) reactions were used. The previous level schemes of~(122)Cs and~(134)Ce have been extended. Possible chiral doublet bands in~(122)Cs have been observed and a shape coexistence with different γ values in~(134)Ce are suggested. 相似文献
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X.-F. Li Y.-J. Ma Y.-Z. Liu J.-B. Lu G.-Y. Zhao L.-C. Yin R. Meng Z.-L. Zhang L.-J. Wen X.-H. Zhou Y.-X. Guo X.-G. Lei Z. Liu Y. Zheng J.-J. He 《The European Physical Journal A - Hadrons and Nuclei》2003,17(4):523-528
High-spin states in 126Cs were populated in the reaction 116Cd(14N, 4n) at a beam energy of 65 MeV. About 50 new transitions were placed in a level scheme that consists of six rotational structures, three of which have been observed for the first time. The newly observed bands and a previously reported but uninterpreted band were assigned configurations based on their population, aligned angular momentum, energy signature splitting and B(M1)/B(E2) ratios (for the strongly coupled bands).Received: 16 September 2002, Revised: 10 March 2003, Published online: 1 July 2003PACS:
21.10.Re Collective levels - 27.60.+j
相似文献
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SUN Xiang-Fu YU Jian-Fang GUO Ying-Xiang LEI Xiang-Guo LUO Yi-Xiao WANG Ji-Cheng XU Xiao-Ji WEN Shu-Xian WENG Pei-Kun LI Sheng-Gang YANG Chu-Xiang 《中国物理C(英文版)》1992,16(6):552-555
Excited states of 124Cs have been studied by means of in beam γ-ray technique via the reaction 109Ag(19F,p3n).Based on the observation of the high spin bands and their decay to the ground state,a level scheme of 124Cs has been established. 相似文献
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马英君 小松原哲郎 王守宇 Cederwall B Nyberg J 张玉虎 古野兴平 李容俊 Sletten G Hagemann G Jensen H Gjorup N 刘运祚 《原子核物理评论》2004,21(4):331-333
通过116Cd(14N,5n),Ebeam=65MeV的核反应布居了125Cs的高自旋态.利用在束γ谱学实验方法,进行了γ-γ符合测量,使已知的125Cs核能级纲图得到了扩展,并且修正了某些组态的带头激发能.High-spin states in odd-A nucleus~(125)Cs have been studied via the~(116)Cd(~(14)N, 5n) reaction at 65 MeV bombarding energy. γ-γ coincidences were recorded with the NORDBALL detector array at Niels Bohr Institute in Denmark. After careful data analysis, most of the previously-known bands have been confirmed and 5 new rotational sequences have been identified. Spin/parity and configuration assignments are tentatively proposed for all of the observed bands. In addition, the bandheads of the 9/2~(+)and (1/2~... 相似文献
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Temperature dependence of the absorption bands due to Cs colloidal particles has been measured for colloids of different radii in additively colored CsBr and CsI. Large reversible shifts in the peak positions of the colloid bands are detected when we measure them at temperatures ranging between RT and LNT. The results are discussed and a tentative explanation based on the thermal change of Cs metal dielectric constants is proposed. 相似文献
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M. J. Brinkman A. Kuhnert E. A. Henry J. A. Becker S. W. Yates R. M. Diamond M. A. Deleplanque F. S. Stephens W. Korten F. Azaiez W. H. Kelly J. E. Draper C. W. Beausang E. Rubel J. A. Cizewski 《Zeitschrift für Physik A Hadrons and Nuclei》1990,335(1):115-116
For the first time, collective bands have been observed in the doubly-odd nucleus124Cs. They are proposed to result in the coupling of an h11/2 proton to h11/2 and positive parity neutrons. The relative residual protonneutron interaction in124Cs is calculated and compared to that of neighbouring odd-odd nuclei. 相似文献
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Ch. Droste L. Goettig T. Morek J. Srebrny J. Bucka J. Dobaczewski S. G. Rohoziński 《Zeitschrift für Physik A Hadrons and Nuclei》1978,284(3):297-303
The level structure of124Xe and126Xe is studied on the basis ofβ + decay of124Cs and126Cs. The Cs isotopes were produced in the Xe(p, n) Cs reactions at a proton energy ofE≈9.5 MeV. Decay schemes are proposed for these nuclei. The available experimental data are compared with the predictions of various models. 相似文献
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The bound-state pair-absorption bands Cs(62 S 1/2)+Cs(62 S 1/2)+h v→Cs(52 D 5/2,3/2) +Cs(62 P 1/2) and the K — K continuum-state pair-absorptions in the wavelength region 2,350≦λ≦2,850 Å have been investigated experimentally. In the case of the bound-state pair-absorption bands a theoretical approach for the absorption cross section at the band centre is given which is in good agreement with the experimental observation. Differences between our and the theoretical formulas given by the Stanford group are discussed. 相似文献
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J. Timár A. Gizon P. Paris J. Genevey J. Gizon F. Hannachi C.F. Liang A. Lopez-Martens J.C. Merdinger B.M. Nyakó B. Weiss L. Zolnai 《The European Physical Journal A - Hadrons and Nuclei》2000,7(1):7-10
High spin states of 126La have been populated using the reaction 116Sn+14N at 68 MeV. γ-rays and conversion electrons were detected with the GAREL array. Multipolarities of the lowest-lying in-band
dipole transitions have been determined from the deduced internal conversion coefficients. Experimental B(M1)/B(E2) ratios
have been derived for the bands and compared with calculated values using the D?nau-Frauendorf geometrical model. Configurations
are proposed for the bands comparing them with cranked shell model calculations and on the basis of the measured B(M1)/B(E2)
ratios. The β-decay of 126La has also been revisited. The population of the 126Ba levels gives a probable spin value of five for the decaying high-spin 126La state with T
1/2≈ 64 s which may indicate a signature inversion in the πh11/2νh11/2 band.
Received: 12 October 1999 相似文献