EPJ Web Conf.
Volume 279, 2023Nuclear Physics in Astrophysics – X (NPA-X 2022)
|Number of page(s)||5|
|Section||Quiescent Phases of Stellar Evolution|
|Published online||22 March 2023|
Potential experimental evidence of an Efimov state in 12C and its influence on astrophysical carbon creation
1 INFN Sezione di Catania, Italy
2 INFNLaboratori Nazionali del Sud, Catania, Italy
3 Cyclotron Institute Texas AM University college station, USA
4 Dip. di Fisica e Astr. “Ettore Majorana”, Università degli Studi di Catania, Italy
5 DSMISFT Università di Messina, Italy
6 DEIB Politecnico Milano and INFN Sez. Milano, Italy
7 Instituto de Física, Universidad Nacional Autónoma de México
* e-mail: email@example.com
Published online: 22 March 2023
We describe the search of the Efimov state in 12C performed by analysing a large set of 3-α particles coincidence data measured at the LNS laboratories with the CHIMERA detector. The data are compatible with the presence of an Efimov state at the excitation energy of 7.485 MeV, with an excitation probability smaller than 0.3% of the population probability of the Hoyle state. The Efimov state gamma decay probability should be around 30%, much larger than the one of the Hoyle state. The population of this level is compatible with the Suda limit for the 3-α reaction rate in stars because its population should be possible only through direct 3-α reaction. More investigations improving the detector angular resolution are needed to confirm these preliminary observations.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.