Sequential Heavy Ion Double Charge Exchange Reactions and the Link to Double $\beta$-decay
| Autor: | Bellone, Jessica I., Burrello, Stefano, Colonna, Maria, Lay, José-Antonio, Lenske, Horst |
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| Rok vydání: | 2019 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Heavy ion double charge exchange reactions are described by sequential meson-exchange, corresponding to a double single charge exchange (DSCE) reaction mechanism. The theoretical formulation is discussed. The fully quantum mechanical distorted wave 2-step calculations are shown to be reproduced very well by approximating the intermediate propagator by its pole part. The role of ion-ion elastic interactions is discussed. As a first application, calculations are performed for the reaction $^{40}$Ca $(^{18}$O $,^{18}$Ne $)^{40}$Ar at 15 AMeV. Results are compared to the data measured at LNS by the NUMEN Collaboration. The common aspects of DSCE reactions and double $\beta$- decay are discussed by a detailed comparison of the respective nuclear matrix elements (NME). Comment: submitted to Phys. Lett. B |
| Databáze: | arXiv |
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