Speaker
Tatiana Leonova
(NRNU MEPhI)
Description
Level structure of heavy helium isotope $^{9,10}$He is studied in the reactions of stopped pion absorption $^{14}$C($\pi^-$, p$^4$Нe )X, $^{14}$C($\pi^-$,d$^3$Нe)X, $^{14}$C($\pi^-$,p$^3$Нe)X. The experiment was carried out at the LANL with a two-arm semiconductor spectrometer. The ground and excited states of $^9$He have been observed. The E$_x \approx$ 11 MeV state of $^9$He has been observed for the first time. The indication of the existence of the E$_r \approx$ 7 MeV resonant state of $^{10}$He was obtained. Parameters of excited states have been compared with data of other experimental and theoretical works.
Primary authors
Tatiana Leonova
(NRNU MEPhI)
Boris Chernyshev
(National Research Nuclear University MEPhI)
Dr.
Yury Gurov
(MEPhi)
Sergei Lapushkin
(NRNU MEPhI)
Vyacheslav Sandukovsky
(Joint Institute for Nuclear Research (JINR))
Michael Tel’kushev
(NRNU MEPhI)
