A1 Journal article (refereed)
Possible neutron and proton halo structure in the isobaric analog states of A=12 nuclei (2020)

Demyanova, A. S., Starastsin, V. I., Danilov, A. N., Ogloblin, A.A., Dmitriev, S. V., Goncharov, S. A., Belyaeva, T. L., Maslov, V. A., Sobolev, Y. G., Trzaska, W., Heikkinen, P., Gurov, G. P., Burtebaev, N., & Janseitov, D. (2020). Possible neutron and proton halo structure in the isobaric analog states of A=12 nuclei. Physical Review C, 102(5), Article 054612. https://doi.org/10.1103/physrevc.102.054612

JYU authors or editors

Publication details

All authors or editors: Demyanova, A. S.; Starastsin, V. I.; Danilov, A. N.; Ogloblin, A. A.; Dmitriev, S. V.; Goncharov, S. A.; Belyaeva, T. L.; Maslov, V. A.; Sobolev, Yu. G.; Trzaska, W.; et al.

Journal or series: Physical Review C

ISSN: 2469-9985

eISSN: 2469-9993

Publication year: 2020

Publication date: 30/11/2020

Volume: 102

Issue number: 5

Article number: 054612

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/physrevc.102.054612

Publication open access: Not open

Publication channel open access: 

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/72985

Abstract

The differential cross sections of the 11B(3He,d)12C reaction leading to formation of the 0+ ground state and the 15.11-MeV 1 +, 16.57-MeV 2−, and 17.23-MeV 1− excited states of 12C are measured at Elab=25 MeV. The analysis of the data is carried out within the coupled-reaction-channels method for the direct proton transfer to the bound and unbound states. The rms radii of the last proton in all states studied are determined. A comparison of the rms radii of the 12B, 12C, and 12N nuclei in the isobaric analog states (IASs) with isospin T=1 determined by different methods allows us to arrive at a conclusion that these nuclei in the 1− excited states at Ex=2.62, 17.23, and 1.80 MeV, respectively, possess one-nucleon (neutron or proton) halo structure. The enlarged radii and a large probability of the last neutron to be outside of the range of the interaction potential are also found for the 2− states of 12B, 12C, and 12N at Ex=1.67, 16.57, and 1.19 MeV, respectively. These IASs also can be regarded as candidates for states with one-nucleon (neutron or proton) halo.

Keywords: nuclear physics

Free keywords: coulomb energies and analogue states

Contributing organizations

Ministry reporting: Yes

VIRTA submission year: 2020

JUFO rating: 2