2018/09/30 by Tokuro Fukui, Yoshiko Kanada-En’yo, Yoshiko Kanada-En'yo +3 · 15 citations
Chemistry · Physics and Astronomy · #Advanced Chemical Physics Studies #Astronomical and nuclear sciences #Atomic physics #Chemistry #Cluster (spacecraft) #Excited state #Geometry #Ground state #Molecular physics #Nuclear physics research studies #Physics #RADIUS #Resonance (particle physics) #Surface (topology) #Wave function #nucl-th
paper · pdf · doi:10.1016/j.nuclphysa.2018.12.024
published in Nuclear Physics A 983, 38-52 (Elsevier BV) · 14 pages, 7 figures
openalex created_date 2018/09/27 · openalex publication_date 2019/01/02 · arxiv created 2019/04/12 · arxiv updated 2019/04/15 · openalex updated_date 2026/08/06
Recently, we have determined surface distributions of α clusters in the ground state of 20Ne from α-transfer cross sections, without investigating the properties of its excited states. In this paper we extend our comprehension of α-cluster structures in excited states of nuclei through reaction studies. In particular we focus on 16O, for which attention has been paid to advances of structure theory and assignment regarding 4+-resonance states. We study the surface manifestation of the α-cluster states in both the ground and excited states of 16O from the analysis of the α-transfer reaction 12C(6Li,d)16O. The α-transfer reaction is described by the distorted-wave Born approximation. We test two microscopic wave functions as an input of reaction calculations. Then a phenomenological potential model is introduced to clarify the correspondence between cluster-wave functions and transfer-cross sections. Surface peaks of the α-wave function of 16O(0+) are sensitively probed by transfer-cross sections at forward angles, while it remains unclear how we trace the surface behavior of 16O(4+) from the cross sections. We are able to specify that the α-cluster structure in the 01+ and 02+ states prominently manifests itself at the radii ∼ 4 and ∼ 4.5~fm, respectively. It is remarkable that the 41+ state has the 12C+α-cluster component with the surface peak at the radius ∼ 4 or outer, whereas the 12C+α-cluster component in the 42+ state is found not to be dominant. The 42+ state is difficult to be interpreted by a simple potential model assuming the 12C+α configuration only.