21-25 March 2022
Salon de actos del IATA
Europe/Madrid timezone

Study of $\alpha-$transfer reactions with $^7$Be in the context of nuclear astrophysics

Not scheduled
Salon de actos del IATA

Salon de actos del IATA

Carrer del Catedràtic Agustín Escardino Benlloch, 7, 46980 Paterna, Valencia


Kabita Kundalia (Bose Institute, India)


In stellar evolution, the rate of $ ^{12}$C($ \alpha$,$ \gamma$)$ ^{16}$O reaction controls the C/O abundance ratio at the end of the helium burning phase, thus defining the further course of development. At stellar temperatures of around 300 keV, the cross section of $^{12}$C($\alpha$,$\gamma$)$^{16}$O is $\sim$ 10$^{-17}$ b, which cannot be measured using current technology. The $\alpha-$capture reaction populating the natural-parity states of the residual nuclei, is an effective indirect tool for studying these types of reactions. In this case, it corresponds to the alpha pickup by $^{12}$C to populate states of $^{16}$O, predominantly the 6.917 MeV state. Loosely bound stable nuclei with prominent $\alpha-$cluster structure, such as $^{6,7}$Li, $^{11}$B have also been used in such studies provided that these are "direct" $\alpha-$transfer and do not proceed via a compound nucleus. However, the breakup contributions from such nuclei have a significant impact on the transfer channels. Interestingly, the $^7$Be nucleus, though having an $\alpha-$cluster structure and a lower breakup threshold of 1.58 MeV, demonstrates lower breakup contribution compared to transfer cross section. In this context, we carried out an experiment at HIE-ISOLDE, CERN, with $^7$Be + $^{12}$C at E = 5 MeV/A to study $\alpha-$transfer reactions populating states in $^{16}$O, that dominantly contribute to the He-burning process. Preliminary results would be presented.

Primary author

Kabita Kundalia (Bose Institute, India)


Prof. Dhruba Gupta (Bose Institute, India) Mr. Sk Mustak Ali (Bose Institute) Prof. Swapan K Saha (Bose Institute, Former Faculty) Olof Tengblad (IEM -CSIC) Javier Díaz Ovejas (IEM-CSIC) Angel Perea Martinez (IEM/CSIC) Ismael Martel (Univesity of Huelva) Prof. Joakim Cederkall (Lund University, Sweden) Dr. Joochun Park (Institute for Basic Science, South Korea) Dr. Stuart Szwec (University of Jyvaskyla)

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