Measurement of the 160Gd(p,n)160Tb excitation function from 4-18 MeV using stacked-target activation

Ryan K Chapman; Andrew S Voyles; Narek Gharibyan; Lee A Bernstein; James E Bevins

doi:10.1016/j.apradiso.2021.109647

Measurement of the ¹⁶⁰Gd(p,n)¹⁶⁰Tb excitation function from 4-18 MeV using stacked-target activation

Appl Radiat Isot. 2021 May:171:109647. doi: 10.1016/j.apradiso.2021.109647. Epub 2021 Feb 16.

Authors

Ryan K Chapman¹, Andrew S Voyles², Narek Gharibyan³, Lee A Bernstein⁴, James E Bevins⁵

Affiliations

¹ Department of Engineering Physics, Air Force Institute of Technology, WPAFB, OH 45433, USA.
² University of California, Berkeley, Berkeley, CA 94720, USA.
³ Lawrence Livermore National Laboratory, Livermore, CA 94551, USA.
⁴ University of California, Berkeley, Berkeley, CA 94720, USA; Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
⁵ Department of Engineering Physics, Air Force Institute of Technology, WPAFB, OH 45433, USA. Electronic address: James.Bevins@afit.edu.

PMID: 33636442
DOI: 10.1016/j.apradiso.2021.109647

Abstract

The ¹⁶⁰Gd(p,n)¹⁶⁰Tb excitation function was measured between 4-18 MeV using stacked-target activation at Lawrence Berkeley National Laboratory's 88-Inch Cyclotron. Nine copper and eight titanium foils served as proton fluence monitor foils, using the ^natCu(p,x)⁶⁵Zn, ^natTi(p,x)⁴⁸V, and ^natTi(p,x)⁴⁶Sc monitor standards, respectively. Variance minimization using an MCNP v.6.2 model reduced the systematic uncertainties in proton energy and fluence. A priori predictions of the ¹⁶⁰Gd(p,n) reaction using ALICE, CoH, EMPIRE, and TALYS, as well as the TENDL database, are compared to the experimentally measured values.

Keywords: (160)Tb; Gadolinium; Gd + p; MCNP; Nuclear cross section; Radioisotope production; Stacked-target activation.

Published by Elsevier Ltd.