학술논문
α-decay properties of new neutron-deficient isotope 203Ac
Document Type
article
Author
J.G. Wang; Z.G. Gan; Z.Y. Zhang; M.H. Huang; L. Ma; M.M. Zhang; H.B. Yang; C.L. Yang; Y.H. Qiang; X.Y. Huang; Z. Zhao; S.Y. Xu; Z.C. Li; L.X. Chen; L.C. Sun; H. Zhou; X. Zhang; X.L. Wu; Y.L. Tian; Y.S. Wang; J.Y. Wang; W.X. Huang; M.L. Liu; Z.W. Lu; Y. He; Z.Z. Ren; S.G. Zhou; X.H. Zhou; H.S. Xu; V.K. Utyonkov; A.A. Voinov; Yu.S. Tsyganov; A.N. Polyakov
Source
Physics Letters B, Vol 850, Iss , Pp 138503- (2024)
Subject
Language
English
ISSN
0370-2693
Abstract
A new isotope 203Ac was produced in the reaction 40Ca + 169Tm at beam energy of 226 MeV. One correlated α-decay chain was attributed to 203Ac. The α-particle energy and half-life were determined to be 8217(16) keV and 56−26+269 μs, respectively. The reduced α-decay width (δ2) of 203Ac was deduced to be 1096−906+921 keV, which indicates a favored α decay. The systematics of δ2 and single-particle energy levels indicate that the new state probably arises from the intruder s1/2 configuration, which shows an onset of deformation in Ac isotopes. The proton separation energy Sp of 203Ac was extracted as −1214(22) keV and the systematics of Sp for odd-A isotopes beyond proton drip line were discussed.