In:
EPJ Web of Conferences, EDP Sciences, Vol. 275 ( 2023), p. 02003-
Abstract:
40 K is one of the main isotopes responsible for the radiogenic heating of the mantle in Earth-like exoplanets [1] and hence, plays a very important role in the internal geophysical dynamics of a planet. The abundance of 40 K in the mantle and the core of such planets is not always possible to be determined by astrophysical observations, although constraining the nuclear reaction rates of 40 K during stellar evolution can also lead to constraining the present amount of 40 K in these planets, which will improve our understanding on the habitability potential of Earth-like exoplanets. This study aims to constrain the 40 K(n, α ) 37 Cl reaction rate, one of the two major destruction paths of 40 K in stellar nucleosynthesis,by measuring the reverse reaction 37 Cl( α ,n) 40 K and applying the principle of detailed balance as we have done before for the 40K ( 40 K(n,p) 40 Ar reaction rate) [2]. During the first set of measurements we performed differential cross-section measurements of th e 37 Cl(α,n 1 γ) 40 K, 37 Cl( α ,n 2 γ ) 40 K and 37 Cl( α ,n 3 γ ) 40 K reaction channels, for six different center of mass energies in the range between 5.1 and 5.4 MeV. The experiment took place at the Edwards Accelerator Laboratory of Ohio University. The gamma rays from the reaction channels mentioned above were detected by two LaBr 3 scintillators. Using the swinger facility to change the angle of the beam-target system with respect to the detection system, we were able to take measurements for the differential cross-section at six different angles between 20° and 120° in the lab system.
Type of Medium:
Online Resource
ISSN:
2100-014X
DOI:
10.1051/epjconf/202327502003
Language:
English
Publisher:
EDP Sciences
Publication Date:
2023
detail.hit.zdb_id:
2595425-8
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