A4 Article in conference proceedings
Halo-like structure in 7He nucleus (2020)

Demyanova, A. S., Ogloblin, A. A., Chernishev, B., Goncharov, S. A., Gurov, Y. B., Lapushkin, S., Belyaeva, T. L., Danilov, A. N., Starastsin, V., & Trzaska, W. H. (2020). Halo-like structure in 7He nucleus. In INPC2019 : 27th International Nuclear Physics Conference (Article 012128). IOP Publishing Ltd. Journal of Physics : Conference Series, 1643. https://doi.org/10.1088/1742-6596/1643/1/012128

JYU authors or editors

Publication details

All authors or editors: Demyanova, Alla S.; Ogloblin, Alexey A.; Chernishev, B.A.; Goncharov, Sergey A.; Gurov, Yu B.; Lapushkin, S.V.; Belyaeva, Tatyana L.; Danilov, Andrei N.; Starastsin, V.I.; Trzaska, Wladyslaw H.

Parent publication: INPC2019 : 27th International Nuclear Physics Conference

Place and date of conference: Glasgow, UK, 29.7.-2.8.2019

Journal or series: Journal of Physics : Conference Series

ISSN: 1742-6588

eISSN: 1742-6596

Publication year: 2020

Number in series: 1643

Article number: 012128

Publisher: IOP Publishing Ltd

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1088/1742-6596/1643/1/012128

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/74056


A study of the neutron structure of the ground state of 7He has been performed by means of registration and analysis of the decay channels of the residual nuclei following absorption of stopped pions. In particular, the reaction 9Be (${\pi }_{}^{-},d$)X have been investigated where X denotes any system with five neutrons and two protons – the constituencies of a 7He nucleus. It was shown that the structure of 7He is determined by correlations of two neutrons in the states 6He (0+), 6He (2+) and one neutron in the shell p3/2. The 4He+3n structure is not manifested in the ground state of 7He. The obtained results are consistent with the known data on considerable mixture of configurations "6He in its ground and first excited states plus a neutron" in the ground state of 7He. Comparison of the diffraction components of the differential cross-sections of the charge-exchange reactions (t, 3He) measured on 6Li and 7Li allowed extracting the radius of particle-unstable nucleus 7He. The latter occurred to be approximately equal to those of 6He and 8He. The obtained result indicates to existence of the halo-like structure in 7He.

Keywords: nuclear physics; helium; beryllium

Free keywords: Cluster state; Nucleon-nucleon interactions; Beryllium

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 1

Last updated on 2021-09-08 at 11:09