München 2019 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 12: Structure and Dynamics of Nuclei II

HK 12.2: Talk

Monday, March 18, 2019, 16:45–17:00, HS 14

Determining the Neutron-Neutron scattering length with a high resolution relative energy measurement — •Vadim Wagner, Thomas Aumann, and Heiko Scheit — TU Darmstadt, Darmstadt, Deutschland

In this contribution a short overview about a proposed experiment at Riken (Japan) for a high precision measurement of neutron-neutron relative energies produced in ⁶He(p,pα)²n reactions to determine the neutron-neutron scattering length will be presented. Previous measurements with two different methods do not agree well, therefore this experiment was proposed with the goal to achieve a total uncertainty of ± 0.2 fm. The sensitivity of this method lies in the shape of the relative energy spectrum, therefore it is crucial that the shape of spectrum is not changed due to acceptance and cross talk rejection. This was investigated with a simulation of the response of the neutron detector HIME.

This work is supported by the BMBF under contract number 05P15RDFN1 and the SFB grand no. 1245.