Open AccessSpectroscopy of 7He in the reactions of stopped pion absorption by 12,14C nuclei
Author(s) -
B. A. Chernyshev,
Yu. B. Gurov,
S. V. Lapushkin,
V. S. Karpukhin,
V. G. Sandukovsky,
T. D. Schurenkova
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1390/1/012013
Subject(s) - excited state , pion , atomic physics , excitation , nuclear reaction , spectroscopy , absorption (acoustics) , physics , isotope , spectrometer , ground state , analytical chemistry (journal) , nuclear physics , chemistry , optics , quantum mechanics , chromatography
The production of the 7 He states was studied in the reactions of stopped pion absorption by carbon isotopes: 12 C(π − , p 4 He) 7 He, 12 C(π − , d 3 He) 7 He and 14 C(π − , t 4 He) 7 He. Measurements were performed using two-arm multilayer semiconductor spectrometer. The ground and excited states were observed in all three reactions. Narrow (Γ < 2 M∍B) state with the high excitation energy ≈ 16 MeV was observed in the 14 C(π − , t 4 He) 7 He reaction.