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

Conference Paper

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.

Full Text

Duke Authors

Cited Authors

  • Friesen, FQL; Ahmed, MW; Crowe, BJ; Crowell, AS; Cumberbatch, LC; Fallin, B; Han, Z; Howell, CR; Malone, RM; Markoff, D; Tornow, W; Witała, H

Published Date

  • March 25, 2016

Published In

Volume / Issue

  • 113 /

Electronic International Standard Serial Number (EISSN)

  • 2100-014X

International Standard Serial Number (ISSN)

  • 2101-6275

Digital Object Identifier (DOI)

  • 10.1051/epjconf/201611308007

Citation Source

  • Scopus