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

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

Authors :
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.
Source :
EPJ Web of Conferences; 2016, Vol. 113, p08007-p.1-08007-p.2, 2p
Publication Year :
2016

Abstract

We provide an update on the development of an experiment at TUNL for determining the <superscript>1</superscript>S<subscript>0</subscript> neutron-neutron (nn) scattering length (a<subscript>nn</subscript>) 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 (HI<subscript>γ</subscript>S) and tritium gas contained in thin-walled cells. The main components of the pla<subscript>nn</subscript>ed 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 a<subscript>nn</subscript>. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
21016275
Volume :
113
Database :
Complementary Index
Journal :
EPJ Web of Conferences
Publication Type :
Conference
Accession number :
114051289
Full Text :
https://doi.org/10.1051/epjconf/201611308007