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Synthesis and Identification of Superheavy Elements in Reactions with 48 Ca Beams
| Content Provider | Semantic Scholar |
|---|---|
| Author | Oganessian, Yu. Ts. Yeremin, A. V. Popeko, Andrey Malyshev, O. N. Yakushev, Alexander B. |
| Copyright Year | 2002 |
| Abstract | For the identification of new nuclides undergoing α decay a method for the investigation of consistent α decays, the socalled α-α correlation analysis, has been employed since mid60ties. This method is based on the fact that a decay chain starting from unknown isotopes should be ended in the known region of isotopes with the known decay properties. Using the neutron-rich isotope Ca as a bombarding beam for the synthesis of new heaviest nuclei we found ourselves in a completely unknown region where all decay chains were started and finished with isotopes having unknown decay properties. According to the calculations the decay chains which started from the neutron-rich (N = 171–175) isotopes of elements 112– 114 after a few α decays should be terminated by spontaneous fission in the region of elements 104–110. Taking into account the above mentioned problems we performed a number of experiments with the use of recoil separator VASSILISSA, each experiment being the basis for the following one. For example, we investigated the complete fusion reactions Ca + 238U→ 286112∗ and Ca + 242Pu→ 290114∗ in which the targets differ by an α particle. It means that the isotopes which can be produced in a subsequent experiment should decay into the isotopes which were obtained in the previous experiments. But for direct determination of Z of the detected nucleus it is necessary to have the mass resolution at the level of a few mass units (≈1%) so that one could distinguish between the xn and αxn deexcitation channels. It is obvious that to have a possibility of mass determination, i.e. to distinguish between the xn and (x+1)n deexcitation channels, the necessary mass resolution should be better than 1 amu (0.3%). |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.radiochem.org/paper/JN31/48.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
