Observation of a p-Wave One-Neutron Halo Configuration in Mg-37

Kobayashi, N; Nakamura, T; Kondo, Y; Tostevin, JA; Utsuno, Y; Aoi, N; Baba, H; Barthelemy, R; Famiano, MA; Fukuda, N; Inabe, N; Ishihara, M; Kanungo, R; Kim, S; Kubo, T; Lee, GS; Lee, HS; Matsushita, M; Motobayashi, T; Ohnishi, T; Orr, NA; Otsu, H; Otsuka, Taka; Sako, T; Sakurai, H; Satou, Y; Sumikama, T; Takeda, H; Takeuchi, S; Tanaka, R; Togano, Y; Yoneda, K

doi:10.1103/PhysRevLett.112.242501

Observation of a p-Wave One-Neutron Halo Configuration in Mg-37

Author:

Kobayashi, N

Nakamura, T ; Kondo, Y ; Tostevin, JA ; Utsuno, Y ; Aoi, N ; Baba, H ; Barthelemy, R ; Famiano, MA ; Fukuda, N ; Inabe, N ; Ishihara, M ; Kanungo, R ; Kim, S ; Kubo, T ; Lee, GS ; Lee, HS ; Matsushita, M ; Motobayashi, T ; Ohnishi, T ; Orr, NA ; Otsu, H ; Otsuka, Taka ; Sako, T ; Sakurai, H ; Satou, Y ; Sumikama, T ; Takeda, H ; Takeuchi, S ; Tanaka, R ; Togano, Y ; Yoneda, K

Keywords:

Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, INTERACTION CROSS-SECTIONS, BEAM SEPARATOR BIGRIPS, PROJECTILE FRAGMENTATION, NUCLEI, RIKEN, REGION, LI-11, NE-31, 01 Mathematical Sciences, 02 Physical Sciences, 09 Engineering, General Physics, 40 Engineering, 49 Mathematical sciences, 51 Physical sciences

Abstract:

Cross sections of 1n-removal reactions from the neutron-rich nucleus (37)Mg on C and Pb targets and the parallel momentum distributions of the (37)Mg residues from the C target have been measured at 240 MeV/nucleon. A combined analysis of these distinct nuclear- and Coulomb-dominated reaction data shows that the (37)Mg ground state has a small 1n separation energy of 0.22(-0.09)(+0.12) MeV and an appreciable p-wave neutron single-particle strength. These results confirm that (37)Mg lies near the edge of the "island of inversion" and has a sizable p-wave neutron halo component, the heaviest such system identified to date.