Charged Particle Production in Stopped Pion Absorption by Nuclei
- Authors: Gurov Y.B.1, Karpukhin V.S.1, Lapushkin S.V.1, Leonova T.I.1, Pritula R.V.1, Chernyshev B.A.1, Sandukovsky V.G.1
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Affiliations:
- National Research Nuclear University MEPhI
- Issue: Vol 82, No 4 (2019)
- Pages: 351-357
- Section: Nuclei
- URL: https://journals.rcsi.science/1063-7788/article/view/194581
- DOI: https://doi.org/10.1134/S1063778819030074
- ID: 194581
Cite item
Abstract
The spectra of 3,4He charged particles produced in stopped pion absorption by nuclei were measured for 17 nuclei in the mass-number range of 6 ≤ A ≤ 209 by means of a semiconductor spectrometer. These data were analyzed on the basis of a phenomenological model where the absorption reaction in question is treated as a three-stage process: primary absorption by intranuclear clusters, preequilibrium stage, and evaporation stage. It is shown that a dominant contribution to the production of helium isotopes with energies not less than 20 MeV comes from the preequilibrium stage. The contribution of the knockout and pickup mechanisms to 3,4He production is estimated.
About the authors
Yu. B. Gurov
National Research Nuclear University MEPhI
Email: chernyshev@mephi.ru
Russian Federation, Moscow, 115409
V. S. Karpukhin
National Research Nuclear University MEPhI
Email: chernyshev@mephi.ru
Russian Federation, Moscow, 115409
S. V. Lapushkin
National Research Nuclear University MEPhI
Email: chernyshev@mephi.ru
Russian Federation, Moscow, 115409
T. I. Leonova
National Research Nuclear University MEPhI
Email: chernyshev@mephi.ru
Russian Federation, Moscow, 115409
R. V. Pritula
National Research Nuclear University MEPhI
Email: chernyshev@mephi.ru
Russian Federation, Moscow, 115409
B. A. Chernyshev
National Research Nuclear University MEPhI
Author for correspondence.
Email: chernyshev@mephi.ru
Russian Federation, Moscow, 115409
V. G. Sandukovsky
National Research Nuclear University MEPhI
Email: chernyshev@mephi.ru
Russian Federation, Moscow, 115409
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