Few-nucleon system dynamics studied via deuteron-deuteron collisions at 160 MeV

I Ciepał ,A Łobejko ,R Ramazani-Sharifabadi ,D Rozpȩdzik ,I Skwira‐Chalot ,A Wrońska ,B Kłos ,B Włoch ,Andrzej Wilczek ,A Magiera ,K Bodek ,E Stephan ,I Mazumdar ,S Kistryn ,P Kulessa ,J G Messchendorp ,N Kalantar Nayestanaki ,J Kuboś ,A Kozela ,W Parol ,G Khatri ,J Zejma

doi:10.21468/scipostphysproc.3.018

Abstract

Four nucleon scattering at intermediate energies provides unique opportunities to study effects of the two key ingredients of the nuclear dynamics, the nucleon-nucleon P-wave (NNP-wave) and the three-nucleon force (3NF). This is possible only with systematic and precise data, in conjunction with exact theoretical calculations. Using the BINA detector at KVI Groningen, the Netherlands, a rich set of differential cross section of the ^{2}2H(d,dp)n breakup reaction at 160 MeV deuteron beam energy has been measured. Besides the three-body breakup, also cross sections of the ^{2}2H(d, ^{3}3He)n proton transfer reaction have been obtained. The data are compared to the recent calculations for the three-cluster breakup.

Highlights

Four-nucleon (4N) system has many advantages over three-nucleon (3N) one what makes it a perfect laboratory to study nuclear forces
The data have been compared to the recent theoretical predictions which are available only for configurations around the quasi-free scattering (QFS) region, in the so-called single-scattering approximation (SSA) for the three-cluster breakup [26], see Sec. 1
In the investigated part of the phase space, corresponding to the forward part of the Big Instrument for Nuclear Polarization Analysis (BINA) setup, the breakup channel is dominated by the quasi-free scattering of the deuteron beam on proton from the deuteron target

Summary

Introduction

Four-nucleon (4N) system has many advantages over three-nucleon (3N) one what makes it a perfect laboratory to study nuclear forces. Only the Lisbon-Vilnius group calculates observables for multi-channel reactions above the breakup threshold [6,7,8], and with the Coulomb force included. They use the momentum space equations of Alt, Grassberger and Sandhas (AGS) [9] for the transition operators. Measurements of the differential cross section at 160 MeV beam energy for the elastic scattering and proton transfer will be presented along with three-body breakup around the quasi-free scattering (QFS) kinematical regime

BINA detection system

Results

Further studies at higher energies

Conclusions