TY - JOUR
T1 - Low-lying intruder 1- state in 12Be and the melting of the N = 8 shell closure
AU - Iwasaki, H.
AU - Motobayashi, T.
AU - Akiyoshi, H.
AU - Ando, Y.
AU - Fukuda, N.
AU - Fujiwara, H.
AU - Fülöp, Zs
AU - Hahn, K. I.
AU - Higurashi, Y.
AU - Hirai, M.
AU - Hisanaga, I.
AU - Iwasa, N.
AU - Kijima, T.
AU - Mengoni, A.
AU - Minemura, T.
AU - Nakamura, T.
AU - Notani, M.
AU - Ozawa, S.
AU - Sagawa, H.
AU - Sakurai, H.
AU - Shimoura, S.
AU - Takeuchi, S.
AU - Teranishi, T.
AU - Yanagisawa, Y.
AU - Ishihara, M.
N1 - Funding Information:
Sincere gratitude is extended to the staff members of the RIKEN Ring Cyclotron for their operation of the accelerator during the experiment. The present work is supported in part by the Ministry of Education, Science, Sports and Culture by Grant-In-Aid for Scientific Research under the program number (B) 08454069.
PY - 2000/10/12
Y1 - 2000/10/12
N2 - Inelastic scattering of the neutron-rich nucleus 12Be on lead and carbon targets has been studied by measuring de-excitation γ rays in coincidence with scattered 12Be. The strong γ-ray transition from the state at E(x) = 2.68(3) MeV following El Coulomb excitation was observed for the lead target, leading to an assignment of J(π) = I- for the excited state. The low excitation energy of this intruder 1- state and the deduced large B(E1; 0(g.s.)/+ → 1-) value of 0.051 (13)e2 fm2 provide a consistent picture o the N = 8 shell melting in 12Be. (C) 2000 Elsevier Science B.V.
AB - Inelastic scattering of the neutron-rich nucleus 12Be on lead and carbon targets has been studied by measuring de-excitation γ rays in coincidence with scattered 12Be. The strong γ-ray transition from the state at E(x) = 2.68(3) MeV following El Coulomb excitation was observed for the lead target, leading to an assignment of J(π) = I- for the excited state. The low excitation energy of this intruder 1- state and the deduced large B(E1; 0(g.s.)/+ → 1-) value of 0.051 (13)e2 fm2 provide a consistent picture o the N = 8 shell melting in 12Be. (C) 2000 Elsevier Science B.V.
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U2 - 10.1016/S0370-2693(00)01017-0
DO - 10.1016/S0370-2693(00)01017-0
M3 - Article
AN - SCOPUS:0034641919
SN - 0370-2693
VL - 491
SP - 8
EP - 14
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1-2
ER -