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No Anomaly of the B（E2） Value Around the Backbend in ^130Ce

Chinese Physics Letters 2002年第2期19卷 187-189页

作者：李广生杨利明等 ChinaInstituteofAtomicEnergy Beijing102413 DepartmentofPhysics TsinghuaUniversityBeijing100084

The lifetime measurements of the high-spin states in the yrast band of 130Ce have been performed by using the Doppler shift attenuation method in conjunction with the reaction 116Sn(16O,2n)130Ce at a projectile energy of 73MeV. The reduced transition probabilities B(E2) deduced from these measurements show a great reduction in the vicinity of the backbending region. The previously reported anomalously high B(E2) value was not observed in the present experiment. This result is in agreement with theoretical prediction based on a realistic nucleon-nucleon interaction.

关键词： lifetime measurements YRAST STATES BAND

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Dramatic transition between electric and magnetic rotations in ^(106)Ag

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Science China(Physics,Mechanics & Astronomy) 2014年第9期57卷 1669-1675页

作者： ZHENG Yun ZHU LiHua CHEN YongShou WU XiaoGuang HE ChuangYe HAO Xin LIU Ying WANG ZhiMin LI XueQin LI GuangSheng GAO ZaoChun SUN HuiBin China Institute of Atomic Energy School of Physics and Nuclear Energy Engineering Beihang University Faculty of Science Shenzhen University School of Environmental and Biological Engineering Nanjing University of Science and Technology Nuclear and Radiation Safety Center Ministry of Environmental Protection

The lifetimes for the states of magnetic dipole band in106Ag have been measured using the Doppler-shift attenuation method via the reaction of100Mo(11B,5n)106Ag at a beam energy of 60 *** reduced transition strengths of the magnetic dipole band,the B(M1)/B(E2)ratios together with the signature of the level energy as a function of angular momentum for the positive parity states of106Ag show that a drastic change of excitation mode,that is,from electric rotation to magnetic rotation,occurs within one unit of spin at around Iπ=12+.Theoretical calculations based on the triaxial projected shell model consistently reproduce the experimental data and provide an explanation on the nature of observed phenomena such that the dynamical drift of the rotational axis suddenly from the principal axis to the tilted one,along the positive parity bands of106Ag.

关键词： lifetime measurements DSAM TPSM magnetic rotation electric rotation

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Experimental studies for nuclear chirality in China

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Frontiers of physics 2023年第6期18卷 15-31页

作者：王守宇刘晨亓斌许文政张惠 Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment School of Space Science and PhysicsInstitute of Space SciencesShandong UniversityWeihai 264209China Weihai Research Institute of Industrial Technology of Shandong University Shandong UniversityWeihai 264209China

In the last decade,chiral symmetry in atomic nuclei has attracted significant attention and become one of the hot topics in current nuclear physics *** paper provides a review of experimental studies for nuclear chirality in *** particular,the experimental setups,chiral mass regions,lifetime measurements,and simultaneous breaking of chirality and other symmetries are discussed in *** studies found a new chiral mass region(A≈80),extended the boundaries of the A≈100 and 130 chiral mass regions,and tested the chiral geometry of^(130)Cs,^(106)Ag,^(80)Br and^(76)Br by lifetime *** addition,simultaneous breaking of chirality and other symmetries have been studied in^(74)As,^(76)Br,^(78)Br,^(80)Br,^(81)Kr and^(131)Ba.

关键词： nuclear chirality lifetime measurements energy spectra electromagnetic transition probabilities

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