Neutron Structure of the Ground State of 7He

Chernyshev, B. A.; Demyanova, A. S.; Goncharov, S. A.; Gurov, Yu. B.; Lapushkin, S. V.; Ogloblin, A. A.; Sandukovsky, V. G.; Trzaska, W. H.

doi:10.1134/s0021364019140030

Cited by 3 publications

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References 26 publications

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“…It is noteworthy that we successfully used the stopped pion absorption reaction to study the structure of levels of other heavy helium isotopes 6 He [16,17] and 7 He [18][19][20].…”

Section: Fields Particles and Nucleimentioning

confidence: 99%

Formation of 8He in the 9Be(π–, p)X and 10B(π–, pp)X Stopped Pion Absorption Reactions

et al. 2021

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The structure of levels of the 8 He heavy helium isotope has been studied in the 9 Be and 10 B stopped pion absorption reactions. Measurements have been performed with a two-arm multilayer semiconductor spectrometer at the LANL. Indications to the existence of a soft dipole mode at the excitation energyMeV have been obtained. A state with a high excitation energy of 12.2(5) MeV has been observed for the first time.

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“…It is noteworthy that we successfully used the stopped pion absorption reaction to study the structure of levels of other heavy helium isotopes 6 He [16,17] and 7 He [18][19][20].…”

Section: Fields Particles and Nucleimentioning

confidence: 99%

Formation of 8He in the 9Be(π–, p)X and 10B(π–, pp)X Stopped Pion Absorption Reactions

et al. 2021

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Halo-like structure in ⁷He nucleus

Demyanova

Ogloblin

Chernishev

et al. 2020

J. Phys.: Conf. Ser.

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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 ( π − , 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.

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ОБРАЗОВАНИЕ 8HE В РЕАКЦИЯХ ПОГЛОЩЕНИЯ ОСТАНОВИВШИХСЯ ПИОНОВ 9BE(π-, P)X И 10B(π-, PP)X

Гуров¹,

Лапушкин²,

Леонова³

et al. 2021

Pis'ma Zh. Eksp. Teor. Fiz.

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Neutron Structure of the Ground State of 7He

Cited by 3 publications

References 26 publications

Formation of 8He in the 9Be(π–, p)X and 10B(π–, pp)X Stopped Pion Absorption Reactions

Formation of 8He in the 9Be(π–, p)X and 10B(π–, pp)X Stopped Pion Absorption Reactions

Halo-like structure in ⁷He nucleus

ОБРАЗОВАНИЕ 8HE В РЕАКЦИЯХ ПОГЛОЩЕНИЯ ОСТАНОВИВШИХСЯ ПИОНОВ 9BE(π-, P)X И 10B(π-, PP)X

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Neutron Structure of the Ground State of 7He

Cited by 3 publications

References 26 publications

Formation of 8He in the 9Be(π–, p)X and 10B(π–, pp)X Stopped Pion Absorption Reactions

Formation of 8He in the 9Be(π–, p)X and 10B(π–, pp)X Stopped Pion Absorption Reactions

Halo-like structure in 7He nucleus

ОБРАЗОВАНИЕ 8HE В РЕАКЦИЯХ ПОГЛОЩЕНИЯ ОСТАНОВИВШИХСЯ ПИОНОВ 9BE(π-, P)X И 10B(π-, PP)X

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Halo-like structure in ⁷He nucleus