| Title | New alpha-Emitting Isotope U-214 and Abnormal Enhancement of alpha-Particle Clustering in Lightest Uranium Isotopes |
| Authors | Zhang, Z. Y. Yang, H. B. Huang, M. H. Gan, Z. G. Yuan, C. X. Qi, C. Andreyev, A. N. Liu, M. L. Ma, L. Zhang, M. M. Tian, Y. L. Wang, Y. S. Wang, J. G. Yang, C. L. Li, G. S. Qiang, Y. H. Yang, W. Q. Chen, R. F. Zhang, H. B. Lu, Z. W. Xu, X. X. Duan, L. M. Yang, H. R. Huang, W. X. Liu, Z. Zhou, X. H. Zhang, Y. H. Xu, H. S. Wang, N. Zhou, H. B. Wen, X. J. Huang, S. Hua, W. Zhu, L. Wang, X. Mao, Y. C. He, X. T. Wang, S. Y. Xu, W. Z. Li, H. W. Ren, Z. Z. Zhou, S. G. |
| Affiliation | Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China Royal Inst Technol KTH, Dept Phys, SE-10691 Stockholm, Sweden Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China Guangxi Normal Univ, Guangxi Key Lab Nucl Phys & Technol, Guilin 541004, Peoples R China Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China Liaoning Normal Univ, Dept Phys, Dalian 116029, Peoples R China Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China Shandong Univ, Sch Space Sci & Phys, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China Tongji Univ, Sch Phys Sci & Engn, Shanghai 200092, Peoples R China Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China Ctr Theoret Nucl Phys, Natl Lab Heavy Ion Accelerator, Lanzhou 730000, Peoples R China |
| Keywords | LEVEL STRUCTURE SHELL-MODEL DECAY REGION |
| Issue Date | 14-Apr-2021 |
| Publisher | PHYSICAL REVIEW LETTERS |
| Abstract | A new alpha-emitting isotope U-214, produced by the fusion-evaporation reaction W-182(Ar-36,4n) U-214, was identified by employing the gas-filled recoil separator SHANS and the recoil-a correlation technique. More precise a-decay properties of even-even nuclei U-216,U-218 were also measured in the reactions of Ar-40, Ca-40 beams with W-180,W-182,W- 184 targets. By combining the experimental data, improved alpha-decay reduced widths delta(2) for the even-even Po-Pu nuclei in the vicinity of the magic neutron number N = 126 are deduced. Their systematic trends are discussed in terms of the N-p N-n scheme in order to study the influence of protonneutron interaction on a decay in this region of nuclei. It is strikingly found that the reduced widths of( 214,216)U are significantly enhanced by a factor of two as compared with the NpNn systematics for the 84 <= Z <= 90 and N < 126 even-even nuclei. The abnormal enhancement is interpreted by the strong monopole interaction between the valence protons and neutrons occupying the pi 1f (7/2) and nu 1f(5/2) spin-orbit partner orbits, which is supported by the large-scale shell model calculation. |
| URI | http://hdl.handle.net/20.500.11897/614297 |
| ISSN | 0031-9007 |
| DOI | 10.1103/PhysRevLett.126.152502 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 核物理与核技术国家重点实验室 |
