Design of an Experiment to Measure ann Using 3H(γ, pn)n at HIγS★

Friesen F.Q.L.; Ahmed M.W.; Crowe B.J.; Crowell A.S.; Cumberbatch L.C.; Fallin B.; Han Z.; Howell C.R.; Malone R.M.; Markoff D.; Tornow W.; Witała H.

doi:10.1051/epjconf/201611308007

EPJ Web of Conferences (Jan 2016)

Design of an Experiment to Measure ann Using 3H(γ, pn)n at HIγS★

Friesen F.Q.L.,
Ahmed M.W.,
Crowe B.J.,
Crowell A.S.,
Cumberbatch L.C.,
Fallin B.,
Han Z.,
Howell C.R.,
Malone R.M.,
Markoff D.,
Tornow W.,
Witała H.

Affiliations

Friesen F.Q.L.: Department of Physics, Duke University and Triangle Universities Nuclear Laboratory
Ahmed M.W.: Department of Mathematics and Physics, North Carolina Central University and Triangle Universities Nuclear Laboratory
Crowe B.J.: Department of Mathematics and Physics, North Carolina Central University and Triangle Universities Nuclear Laboratory
Crowell A.S.: Department of Physics, Duke University and Triangle Universities Nuclear Laboratory
Cumberbatch L.C.: Department of Physics, Duke University and Triangle Universities Nuclear Laboratory
Fallin B.: Department of Physics, Duke University and Triangle Universities Nuclear Laboratory
Han Z.: Department of Physics, Duke University and Triangle Universities Nuclear Laboratory
Howell C.R.: Department of Physics, Duke University and Triangle Universities Nuclear Laboratory
Malone R.M.: Department of Physics, Duke University and Triangle Universities Nuclear Laboratory
Markoff D.: Department of Mathematics and Physics, North Carolina Central University and Triangle Universities Nuclear Laboratory
Tornow W.: Department of Physics, Duke University and Triangle Universities Nuclear Laboratory
Witała H.: M. Smoluchowski Institute of Physics, Jagiellonian University

DOI: https://doi.org/10.1051/epjconf/201611308007
Journal volume & issue: Vol. 113
p. 08007

Abstract

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We provide an update on the development of an experiment at TUNL for determining the 1S0 neutron-neutron (nn) scattering length (ann) from differential cross-section measurements of three-body photodisintegration of the triton. The experiment will be conducted using a linearly polarized gamma-ray beam at the High Intensity Gamma-ray Source (HIγS) and tritium gas contained in thin-walled cells. The main components of the planned experiment are a 230 Ci gas target system, a set of wire chambers and silicon strip detectors on each side of the beam axis, and an array of neutron detectors on each side beyond the silicon detectors. The protons emitted in the reaction are tracked in the wire chambers and their energy and position are measured in silicon strip detectors. The first iteration of the experiment will be simplified, making use of a collimator system, and silicon detectors to interrogate the main region of interest near 90° in the polar angle. Monte-Carlo simulations based on rigorous 3N calculations have been conducted to validate the sensitivity of the experimental setup to ann.

Published in EPJ Web of Conferences

ISSN: 2100-014X (Online)
Publisher: EDP Sciences
Country of publisher: France
LCC subjects: Science: Physics
Website: http://www.epj-conferences.org/

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