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| 1 | 首次发现A=130核区中的t-band显示文摘Backbending played a pivotal role in the progress of high-spin structure research[1].This phennomenon was interpreted as a result of band-crossing between two intrinsic configurations which dominate lower-and higher-spin region.Usually the two configurations are differed by two nucleons,which are paired in the former,and unpaired in the latter.According to the strong-coupling scheme,two unpaired quasi-particles can couple to both high-K and low-K configurations in deformed nuclei.Usually only the lower can be identified experimentally since it is favoured by the Gallagher-Moszkowski spin-spin coupling rules[2]. | Guo Song Qiang Yunhua C.M.Petrache Liu Minliang Wang Jianguo A.Astier B.F.Lv D.Bazzacco G.de Angelis Fang Yongde Li Guangshun Zheng Kuankuan Li Ren A.Goasduff K.Hadynska G.Jaworski D.R.Napoli M.Siciliano J.J.Valiente-Dobon | 2018 | IMP & HIRFL Annual Report2018，，1： | 0 |
| 2 | Coexsitence of Three Foundamental Symmetries in One Nucleus显示文摘Near degeneracy between two quantum states is usually associated with fundamental symmetries and symmetry breakings in complex many-body systems like atomic nuclei.Pseudospin symmetry was introduced to describe energy degeneracy between single-particle states with quantum numbers(n,l,j=l+1/2)and(n-1,l+2,j=l+3/2)[1-3]. | Guo Song Qiang Yunhua C.M.Petrache Liu Minliang Wang Jianguo A.Astier B.F.Lv D.Bazzacco G.de Angelis Fang Yongde Li Guangshun Zheng Kuankuan Li Ren A.Goasduff K.Hadynska G.Jaworski D.R.Napoli M.Siciliano J.J.Valiente-Dobon | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
| 3 | ^(130)Ba中同质异能态上的能级结构显示文摘Isomeric I^(π)=8^(-) states have been observed in the even-even N=74 nuclei ^(138)Gd[1],^(136)Sm[2],^(134)Nd[3],^(132)Ce[4],^(130)Ba[5],^(128)Xe[6]with half-lives ranging from nanoseconds(Xe)to milliseconds(Ba,Ce).Rotational bands built on the K^(π)=8^(-) isomer were identified in all these isotones,with the exception of 130Ba.The singleparticle configuration of the isomers have been deduced from theΔI=2 toΔI=1γ-ray intensity branching ratios,which allowed to extract the(gK��gR)/Q0 values,and therefore the quasi-particle configuration of the state. | Guo Song Qiang Yunhua C.M.Petrache Liu Minliang Wang Jianguo A.Astier B.F.Lv D.Bazzacco G.de Angelis Fang Yongde Li Guangshun Zheng Kuankuan Li Ren A.Goasduff K.Hadynska G.Jaworski D.R.Napoli M.Siciliano J.J.Valiente-Dobon | 2017 | IMP & HIRFL Annual Report2017，，1： | 0 |
| 4 | ^(95)Tc能级纲图的建立显示文摘High spin level structure of ^(95)Tc was reinvestigated via the ^(90)Zr(^(12)C,αp2n)^(95)Tc fusion-evaporation reaction using the incident beam energy of 78 MeV ^(12)C provided by the SFC of the Institute of Modern Physics(IMP),Chinese Academy of Sciences(CAS).The target was 1.82 mg/cm^(2) ^(90)Zr on 8.23 mg/cm^(2) natural lead backing.The emittedγrays from the reaction products were detected by an multidetector array consisting of 15 HPGe detectors of which 8 HPGe detectors have Anti-Compton shieds,7 Clover detectors placed in a plane perpendicular to the beam and 3 LaBr3 detectors at 30◦against the beam.The energy and efficiency calibrations were made using ^(60)Co,^(133)Ba,and ^(152)Eu standard sources and the typical energy resolution is 2.0 to 2.5 keV at full width at half-maximum(FWHM)for a 1332.5 keV γ ray of ^(60)Co.Events have been collected when at least two detectors are fired within the prompt coincidence time window of 100 ns.Under these conditions,a total of 3.5×10^(6) coincidence events were recorded and the data were sorted into a symmetrized Eγ-Eγ matrix for subsequent off-line analysis. | Zheng Kuankuan Liu Minliang Wang Jianguo Guo Song Qiang Yunhua Li Guangshun Fang Yongde Zheng Yong Zhou Xiaohong | 2017 | IMP & HIRFL Annual Report2017，，1： | 0 |
| 5 | 2-3 Lifetime Measurement of the First 7/2^+State in 143Eu Based on Gas-flled Spectroscopy显示文摘The application of Lanthanum Bromide(LaBr3)detectors provides a unique opportunity to measure lifetime of excited states in picosecond-nanosecond region.Reducing the background is of critical importance to get precise results.For some excited states feeding from isomers with lifetime longer than 1μs,it can be achieved by the Spectrometer for Heavy Atom and Nuclear Structure(SHANS)[1].143Eu nuclei were populated via the 123Sb(24Mg,4n)fusion-evaporation reaction.Most of the evaporation residues at ground state or long-lived isomers were transferred to detection terminal after a flight of about 1.4μs in SHANS.In the case of 143Eu,three transitions have been observed(Fig.1). | Guo Song Wang Kailong Liu Minliang Zheng Yong Zhou Xiaohong Wang Jianguo Qiang Yunhua Zhang Yuhu Gan Zaiguo Zhang Zhiyuan Ma Long Yang Huabin Yu Lin Ding Bing Jiang Jian Fang Yongde Li Guangshun Zheng Kuankuan | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
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