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| VOLUME 111 (2020) | ISSUE 8 | PAGE 483 |
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States of 12N with enhanced radii
A. S. Demyanovaa, A. N. Danilova, A. A. Ogloblina, V. I. Starastsina, S. V. Dmitrieva, W. H. Trzaskab, S. A. Goncharovc, T. L. Belyaevad, V. A. Maslove, Yu. G. Soboleve, Yu. E. Penionzhkeviche, S. V. Khlebnikovf, G. P. Tyurinf, N. Burtebaevg, D. Janseitove,g, Yu. B. Gurovh, J. Loukob, V. M. Sergeeva,c
aNational Research Centre Kurchatov Institute, 123182 Moscow, Russia bDepartment of Physics, University of Jyväskylä, FI-40014 Jyväskylä, Finland cLomonosov Moscow State University, 119991 Moscow, Russia dUniversidad Autónoma del Estado de México, 50000 Toluca, México eFlerov Laboratory for Nuclear Research, Joint Institute for Nuclear Research, 141980 Dubna, Russia fV. G. Khlopin Radium Institute, 194021 St. Petersburg, Russia gInstitute of Nuclear Physics, National Nuclear Center of Republic of Kazakhstan, 050032 Almaty, Republic of Kazakhstan hNational Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia
Abstract
The differential cross sections of the 12C(3He, t)12N reaction leading to formation of the 1+ (ground state), 2+(0.96 MeV), 2-(1.19 MeV), and 1-(1.80 MeV) states of 12N are measured at E(3He) = 40 MeV. The analysis of the data is carried out within the modified diffraction model (MDM) and distorted wave Born approximation (DWBA). Enhanced rms radii were obtained for the ground, 2-(1.19 MeV), and 1-(1.80 MeV) states. We revealed that 12B, 12N, and 12C in the isobaric analogue states (IAS) with T=1, and spin-parities 2- and 1- have increased radii and exhibit properties of neutron and proton halo states. |