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The g-factor measurement as an ultimate test for nuclear chirality

Frontiers of physics 2024年第3期19卷 1-10页

作者： Ernest Grodner Michał Kowalczyk Julian Srebrny Leszek Próchniak Chrystian Droste Jan Kownacki Maciej Kisieliński Krzysztof Starosta Takeshi Koike National Centre for nuclear Research 05-540ŚwierkPoland Heavy Ion Laboratory University of WarsawPasteura 5a02-093 WarsawPoland Faculty of Physics University of WarsawPasteura 502-093 WarsawPoland Simon Fraser University 8888 University Drive BurnabyB.C.Canada V5A 1S6 Department of Physics Tohoku UniversitySendaiMiyagi 980-8577Japan

We present results of a series of experiments aimed at finding the most direct fingerprints of a phenomenon of nuclear chirality. These experiments brought a detailed knowledge of the so called partner bands in 132La, 128Cs and 126Cs including absolute values of E2 and M1 transition probabilities obtained through the DSA (Doppler Shift Attenuation) method. Considering the indirect character of observables such as energies and transition rates we proposed measurement of the g-factor of a chosen state as a direct, ultimate test of chirality. Our experiment on the bandhead of partner bands in 128Cs showed feasibility of this approach. Measured value of the g-factor which suggests non-chiral character of this state leads to another puzzle in the chirality studies — how the chirality emerges with increasing spin of levels along a partner band.

关键词： nuclear chirality electromagnetic transitions electromagnetic moments level lifetimes

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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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Chiral doublet bands in odd-A nuclei 103,105Rh

Chiral doublet bands in odd-A nuclei 103,105Rh

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第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： Bin Qi~(1 1)) Shou Yu Wang~1 Shuang Quan Zhang~2 Jie Meng~2 1(School of Space Science and Physics,Shandong University at Weihai,Weihai 264209,China) 2(School of Physics,and State-Key Lab.Nucl.Phys.& Tech.,Peking University,Beijing 100871,China)

Spontaneous chiral symmetry breaking is a phenomenon of general interest in chemistry,biology and particle *** the pioneering work of nuclear chirality in 1997,much effort has been devoted to further explore this interesting *** the observation of chiral doublet bands in N = 75 isotones, more candidates have been reported over more than 20 nuclei experimentally in A～100,130 and 190 mass regions including odd-odd,odd-A and even-even nuclei.

关键词： nuclear chirality odd-A nuclei many-particle many-hole configuration particle rotor model

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