Abstract
The synthesis of the neutron deficient ^138La nucleus has been a puzzle for a long time. It has not been clear whether it is produced through photodisintegration processes or neutrino induced reactions due to unavailability of experimental data for nuclear level densities and gamma strength functions of ^138,139La nuclei. In the present work these nuclear properties have been measured and are used to investigate the synthesis of ^138La. The results support the neutrino interactions as a dominant production process for ^138La.
Highlights
It has not been clear whether it is produced through photodisintegration processes or neutrino induced reactions due to unavailability of experimental data for nuclear level densities and γ strength functions of 138,139La nuclei
Most p-nuclei are synthesized in the O/Ne-rich layers of Type II supernovae through photodisintegration of s- and r-process seed nuclei [1]. 138La is one of these p-nuclei, but its solar abundance is under-produced in p-process calculations by a factor of ≈ 10 [1], and more exotic processes such as neutrino-induced reactions have been evoked to explain its synthesis [2, 3]
The solar abundance of 138La can be reproduced through charged-current neutrino interactions with 138Ba, as quantitatively shown by Ref. [1]
Summary
Most p-nuclei are synthesized in the O/Ne-rich layers of Type II supernovae through photodisintegration (pprocess) of s- and r-process seed nuclei [1]. 138La is one of these p-nuclei, but its solar abundance is under-produced in p-process calculations by a factor of ≈ 10 [1], and more exotic processes such as neutrino-induced reactions have been evoked to explain its synthesis [2, 3]. It has not been clear whether it is produced through photodisintegration processes or neutrino induced reactions due to unavailability of experimental data for nuclear level densities and γ strength functions of 138,139La nuclei.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
