1. He-8 nuclei stopped in nuclear track emulsion
- Author
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R. S. Slepnev, R. Stanoeva, A. A. Bezbakh, Al-Z. Farrag, V. V. Rusakova, V. Chudoba, S. V. Stepantsov, V. Bradnova, R. R. Kattabekov, M. S. Golovkov, I. G. Zarubina, A. S. Fomichev, A. V. Gorshkov, G. Kaminsky, D. A. Artemenkov, S. A. Krupko, P. I. Zarubin, K. Z. Mamatkulov, and N. K. Kornegrutsa
- Subjects
Physics ,Nuclear reaction ,Energy distribution ,Spatial structure ,QC1-999 ,FOS: Physical sciences ,Atomic and Molecular Physics, and Optics ,Nuclear physics ,Nuclear track ,Thermal ,Emulsion ,Nuclear Experiment (nucl-ex) ,Nucleon ,Nuclear Experiment ,Beam (structure) - Abstract
The fragment separator ACCULINNA in the G. N. Flerov Laboratory of Nuclear Reactions of JINR was used to expose a nuclear track emulsion to a beam of radioactive $^{8}$He nuclei of energy of 60 MeV and enrichment of about 80%. Measurements of decays of $^{8}$He nuclei stopped in the emulsion allow one to evaluate possibilities of $\alpha$-spectrometry and to observe a thermal drift of $^{8}$He atoms in matter. Knowledge of the energy and emission angles of $\alpha$-particles allows one to derive the energy distribution of $\alpha$-decays Q$_{2\alpha}$. The presence of a "tail" of large values Q$_{2\alpha}$ is established. The physical reason for the appearance of this "tail" in the distribution Q$_{2\alpha}$ is not clear. Its shape could allow one to verify calculations of spatial structure of nucleon ensembles emerging as $\alpha$-pairs of decays via the state $^8$Be$_{2+}$., Comment: 9 pages, 4 figures, conference: The 22nd European Conference on Few Body Problems in Physics, Krakow, Poland, 9 - 13 September
- Published
- 2014