Effect of nuclear-reaction mechanisms on the population of excited nuclear states and isomeric ratios
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- 作者：N. K. Skobelev
- 刊名：Physics of Atomic Nuclei
- 出版年：2016
- 出版时间：July 2016
- 年：2016
- 卷：79
- 期：4
- 页码：534-542
- 全文大小：755 KB
- 刊物类别：Physics and Astronomy
- 刊物主题：Physics
Elementary Particles and Nuclei
Russian Library of Science - 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
- ISSN：1562-692X
- 卷排序：79
文摘
Experimental data on the cross sections for channels of fusion and transfer reactions induced by beams of radioactive halo nuclei and clustered and stable loosely bound nuclei were analyzed, and the results of this analysis were summarized. The interplay of the excitation of single-particle states in reaction-product nuclei and direct reaction channels was established for transfer reactions. Respective experiments were performed in stable (6Li) and radioactive (6Не) beams of the DRIBs accelerator complex at the Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, and in deuteron and 3Не beams of the U-120M cyclotron at the Nuclear Physics Institute, Academy Sciences of Czech Republic (Řež and Prague, Czech Republic). Data on subbarrier and near-barrier fusion reactions involving clustered and loosely bound light nuclei (6Li and 3He) can be described quite reliably within simple evaporation models with allowance for different reaction Q-values and couple channels. In reactions involving halo nuclei, their structure manifests itself most strongly in the region of energies below the Coulomb barrier. Neutron transfer occurs with a high probability in the interactions of all loosely bound nuclei with light and heavy stable nuclei at positive Q-values. The cross sections for such reactions and the respective isomeric ratios differ drastically for nucleon stripping and nucleon pickup mechanisms. This is due to the difference in the population probabilities for excited single-particle states.Original Russian Text © N.K. Skobelev, 2016, published in Yadernaya Fizika, 2016, Vol. 79, No. 4, pp. 347–355.