MOYMH01
JINR/FLNR, Moscow region, Russia
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MOYMH01 |
Experimental Approach to the Synthesis of Exotic Nuclei Using Heavy Ion Accelerators | |
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| Speaking of exotic nuclei, we have in mind nuclei with ratios of proton to neutron numbers significantly differing from those of nuclei lying at the beta-stability valley, nuclei existing only due to stabilizing effects of nuclear shells, nuclei having unusual form or nucleon density distribution. The study of exotic nuclei provides excellent possibilities for testing models of nuclear forces and structure, reaction mechanisms and astrophysical processes. For producing exotic nuclei, different types of reactions induced by heavy ions are used: direct reactions - Coulomb excitation, nucleon transfer and spallation reactions, fragmentation of target and projectile nuclei, heavy ion induced fission and complete fusion reactions. To induce reactions ions with energy from n*MeV up to n*GeV, in the full accessible range of atomic numbers and masses are used. Secondary beams of exotic nuclei employed for producing of even more exotic species. For isolation of reaction products from primary beam on-line electromagnetic fragment separators, electrostatic separators, velocity selectors and gas-filled set-ups equipped with sophisticated detection systems find application. For producing secondary beams, IGISOL technique is effective in several cases. Special attention is payed to synthesis of super heavy nuclei. Over the past decade, numerous isotopes of super heavy elements with Z=112-118 have been produced in complete fusion reactions of accelerated 48Ca ions with actinide targets. | ||
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Slides MOYMH01 [52.037 MB] | |
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