New isotope Th-207 and odd-even staggering in alpha-decay energies for nuclei with Z > 82 and N < 126

doi:10.1103/PhysRevC.105.L051302

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	New isotope Th-207 and odd-even staggering in alpha-decay energies for nuclei with Z > 82 and N < 126
	Yang, H. B.; Gan, Z. G.; Zhang, Z. Y.; Huang, M. H.; Ma, L.; Zhang, M. M.; Yuan, C. X.; Niu, Y. F.; Yang, C. L.; Tian, Y. L.
刊名	PHYSICAL REVIEW C
	2022
卷号	105 期号:5 页码:L051302
关键词	SHELL-MODEL REGION
ISSN号	2469-9985
DOI	10.1103/PhysRevC.105.L051302
英文摘要	The new thorium isotope Th-207 has been produced in the 5n evaporation channel of the fusion reaction Ar-36 + Hf-176. It was separated in flight by the gas-filled recoil separator SHANS and identified on the basis of a correlated alpha-decay chain. The alpha decay of Th-207, measured with an alpha-particle energy of 8167(21) keV and a half-life of 9.7(-4.4)(+46.6) ms, is assigned to originate from ground state. By combining with existing data, we find that the a-decay energies of nuclei with Z > 82 and N < 126 show a regular and distinct odd-even staggering (OES) rather than the commonly supposed smooth pattern. A theoretical analysis has been performed within relativistic Hartree-Fock-Bogoliubov and large-scale shell-model approaches. It is found that the OES originates from both pairing correlations and blocking of particular orbitals by unpaired nucleons. Of particular importance is that pairing correlations result in the OES not only through the contribution of pairing energy to binding energy, but also by configuration mixing induced by scattering nucleons to orbitals away from Fermi levels.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27807]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Yang, C. L. 2.[Yang, H. B. 3.Gan, Z. G. 4.Zhang, M. M. 5.Zhang, Z. Y. 6.Huang, M. H. 7.Ma, L. 8.Tian, Y. L. 9.Wang, Y. S. 10.Wang, J. G.
推荐引用方式 GB/T 7714	Yang, H. B.,Gan, Z. G.,Zhang, Z. Y.,et al. New isotope Th-207 and odd-even staggering in alpha-decay energies for nuclei with Z > 82 and N < 126[J]. PHYSICAL REVIEW C,2022,105(5):L051302.
APA	Yang, H. B..,Gan, Z. G..,Zhang, Z. Y..,Huang, M. H..,Ma, L..,...&Solovyev, D. I..(2022).New isotope Th-207 and odd-even staggering in alpha-decay energies for nuclei with Z > 82 and N < 126.PHYSICAL REVIEW C,105(5),L051302.
MLA	Yang, H. B.,et al."New isotope Th-207 and odd-even staggering in alpha-decay energies for nuclei with Z > 82 and N < 126".PHYSICAL REVIEW C 105.5(2022):L051302.