https://doi.org/10.1051/epjconf/202328401037
The 41Ar(n,y)42Ar reaction
1 The Hebrew University of Jerusalem, Jerusalem, Israel 91904
2 Institut Laue-Langevin, Grenoble, France
3 Argonne National Laboratory, Argonne, IL 60439, USA
4 Soreq Nuclear Research Center, Yavne, Israel
5 Lawrence Livermore National Laboratory, Livermore, CA, USA
6 University of Notre Dame, Notre Dame, IN 465656, USA
* e-mail: paul@vms.huji.ac.il
Published online: 26 May 2023
The cross-section of the thermal neutron capture 41Ar(n,γ)42Ar(t1/2=32.9 y) reaction was measured by irradiating a 40Ar sample at the high-flux reactor of Institut Laue-Langevin (ILL) Grenoble, France. The signature of the two-neutron capture has been observed by measuring the growth curve and identifying the 1524.6 keV γ-lines of the shorter-lived 42K(12.4 h) β− daughter of 42Ar. Our preliminary value of the 41Ar(n,γ)42Ar thermal cross section is 240(80) mb at 25.3 meV. For the first time, direct counting of 42Ar was performed using the ultra-high sensitivity technique of noble gas accelerator mass spectrometry (NOGAMS) at Argonne National Laboratory, USA.
© 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.
