Open AccessHigh energy alpha particle emission as a challenging mechanism for synthesis of very heavy nuclei
Author(s) -
C. Borcea,
Yu. É. Penionzhkevich,
S. M. Lukyanov
Publication year - 2020
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 - 10.1088/1742-6596/1643/1/012072
Subject(s) - physics , kinematics , alpha particle , excitation , atomic physics , nuclear physics , energy (signal processing) , spectral line , nuclear reaction , classical mechanics , quantum mechanics , astronomy
Two experiments made with the MSP144 stepped pole magnetic spectrometer of FLNR-JINR Dubna measured the energy spectra of α particles emitted at zero degree (collinear kinematic) in the reactions 40 Ar(220 MeV) + 232 Th and 48 Ca(270 MeV) + 238 U. The study was pursued up to the maximum energy the alpha particles may have in a two-body reaction, without excitation of the reaction partners, the so-called kinematic limit. The observed cross sections in the vicinity of the kinematic limits were of the order of μb. In the indicated reactions, the heavy partners of the recorded alpha particles in the exit channel were respectively 268 Sg and 282 Db. At the kinematic limit, the heavy partners have excitation energies close to zero, therefore a high probability to survive.