Speaker
Dr.
Boris Chernyshev
(National Research Nuclear University MEPhI)
Description
Search for isobar-analog states of superheavy hydrogen isotopes 5-7H was performed among the high-excited states of helium isotopes 5-7He. The excited spectra were measured in stopped pion absorption by light nuclei. The experiment was performed at low energy pion channel of LANL with two-arm multilayer semiconductor spectrometer. The method of research is based on precise measurements of energies of charged particles emitted after pion absorption by nuclei. The important advantage of this method is the possibility of studying a wide range of excitation energies up to Ex = 40 MeV.
Excited states of 5-7He were observed in three-body reaction channels on the 9Be and 10,11B nuclei. Several excited levels were found only in our measurements. 6He excited state with Ex = 27.0(8) MeV observed in 10В(pi-,pt)X channel is an isobar-analog candidate for 6H with Er ~ 5.5 MeV. 7He excited state with Ex = 24.8(4) MeV observed in 10В(pi-,pd)X, 11В(pi-,pt)X and 11В(pi-,dd)X channels is an isobar-analog candidate for 7H with Er ~ 3 MeV.
| Presentation type | Section talk (10+5 min) |
|---|
Primary author
Dr.
Boris Chernyshev
(National Research Nuclear University MEPhI)
Co-authors
Mr.
Denis Kuznetsov
(National Research Nuclear University “MEPhI”)
Mrs.
Larisa Korotkova
(National Research Nuclear University “MEPhI”)
Mr.
Michail Tel’kushev
(National Research Nuclear University “MEPhI”)
Dr.
Sergey Lapushkin
(National Research Nuclear University “MEPhI”)
Ms.
Tatyana Schurenkova
(National Research Nuclear University “MEPhI”)
Dr.
Yurii Gurov
(National Research Nuclear University “MEPhI”)
