학술논문
Intruder configurations in 29Ne at the transition into the island of inversion: Detailed structure study of 28Ne
Document Type
article
Author
H. Wang; M. Yasuda; Y. Kondo; T. Nakamura; J.A. Tostevin; K. Ogata; T. Otsuka; A. Poves; N. Shimizu; K. Yoshida; N.L. Achouri; H. Al Falou; L. Atar; T. Aumann; H. Baba; K. Boretzky; C. Caesar; D. Calvet; H. Chae; N. Chiga; A. Corsi; H.L. Crawford; F. Delaunay; A. Delbart; Q. Deshayes; Zs. Dombrádi; C. Douma; Z. Elekes; P. Fallon; I. Gašparić; J.-M. Gheller; J. Gibelin; A. Gillibert; M.N. Harakeh; A. Hirayama; C.R. Hoffman; M. Holl; A. Horvat; Á. Horváth; J.W. Hwang; T. Isobe; J. Kahlbow; N. Kalantar-Nayestanaki; S. Kawase; S. Kim; K. Kisamori; T. Kobayashi; D. Körper; S. Koyama; I. Kuti; V. Lapoux; S. Lindberg; F.M. Marqués; S. Masuoka; J. Mayer; K. Miki; T. Murakami; M.A. Najafi; K. Nakano; N. Nakatsuka; T. Nilsson; A. Obertelli; N.A. Orr; H. Otsu; T. Ozaki; V. Panin; S. Paschalis; A. Revel; D. Rossi; A.T. Saito; T. Saito; M. Sasano; H. Sato; Y. Satou; H. Scheit; F. Schindler; P. Schrock; M. Shikata; Y. Shimizu; H. Simon; D. Sohler; O. Sorlin; L. Stuhl; S. Takeuchi; M. Tanaka; M. Thoennessen; H. Törnqvist; Y. Togano; T. Tomai; J. Tscheuschner; J. Tsubota; T. Uesaka; Z. Yang; K. Yoneda
Source
Physics Letters B, Vol 843, Iss , Pp 138038- (2023)
Subject
Language
English
ISSN
0370-2693
Abstract
Detailed γ-ray spectroscopy of the exotic neon isotope 28Ne has been performed for the first time using the one-neutron removal reaction from 29Ne on a liquid hydrogen target at 240 MeV/nucleon. Based on an analysis of parallel momentum distributions, a level scheme with spin-parity assignments has been constructed for 28Ne and the negative-parity states are identified for the first time. The measured partial cross sections and momentum distributions reveal a significant intruder p-wave strength providing evidence of the breakdown of the N=20 and N=28 shell gaps. Only a weak, possible f-wave strength was observed to bound final states. Large-scale shell-model calculations with different effective interactions do not reproduce the large p-wave and small f-wave strength observed experimentally, indicating an ongoing challenge for a complete theoretical description of the transition into the island of inversion along the Ne isotopic chain.