States of the 12N Nucleus with Increased Radii

Alla S. Demyanova, A. N. Danilov, A. A. Ogloblin, V. I. Starastsin, S. V. Dmitriev, Wladyslaw Henryk Trzaska, S. A. Goncharov, Tatyana Leonidovna Belyaeva, V. A. Maslov, Yu. G. Sobolev

8 more authors

Yu. É. Penionzhkevich, S. V. Khlebnikov, G. P. Tyurin, N. Burtebaev, Daniyar M. Janseitov, Yu. B. Gurov, J. Louko, V. M. Sergeev

2020

Full text Open access: Green Metadata (CSL-JSON)

DOI 10.1134/s0021364020080020

Data confidence 70 medium

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Abstract

The differential cross sections for the 12 C( 3 He, t ) 12 N reaction leading to formation of the 1 + (ground state), 2 + (0.96 MeV), 2 − (1.19 MeV), and 1 − (1.80 MeV) states of 12 N are measured at E ( 3 He) = 40 MeV. The analysis of the data is carried out within the modified diffraction model and distorted wave Born approximation. Increased rms radii have been obtained for the ground, 2 − (1.19 MeV), and 1 − (1.80 MeV) states. We revealed that 12 B, 12 N, and 12 C in the isobaric analogue states with T = 1, and spin-parities 2 − and 1 − have increased radii and exhibit properties of neutron and proton halo states.