Studies of Few-Body Nuclei with Tagged Photons at MAX-lab (Open call for Nuclear Physics Travel requests)

Lead Research Organisation: University of Glasgow
Department Name: School of Physics and Astronomy


This project seeks funding for travel to carry of programme of experiments at the Tagged-Photon facility of MAX-lab in Lund Sweden. Experiments will use energetic photons (high-energy X rays) to probe the structure of 3He and 4He atomic nuclei. They will also provide structure information on the protons and neutrons, which make up these nuclei. The protons and neutrons themselves are composites of elementary quarks and gluons which interact via the strong force, described by Quantum Chromo Dynamics (QCD). The measurements, allied to new 'chiral effective field theory' developments in few-body structure theory, will provide a quantitative link between nuclear properties and the fundamental colour force, described by QCD. The measurements will be based on He gas scintillator active target technology. Particles which interact in the gas to cause ionisation produce scintillations, signalling detection of an event where an energetic photon disintegrates a target nucleus (He) into two or more fragments. The target is designed to be highly efficient for detecting nuclear fragments but highly inefficient for detecting electrons produced by atomic interactions of the photon beam with target material. Thus the target effectively suppresses background processes which otherwise would obscure the signals of interest. Commissioning of the completely new active target will be completed in March 2009, after which 'full production' measurements of He photo disintegration characteristics can start. We plan to use tagged-photon beam periods in June 2009 and also in September-October of 2009. Final scheduling for nuclear physics operations in the second half of 2009 will take place after June.


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Description Kharkov 
Organisation Kharkov Institute of Physics and Technology
Country Russian Federation 
Sector Academic/University 
PI Contribution We provide the 4He gas scintillator active target and expertise with neutron and photon detection systems.
Collaborator Contribution Exchange of ideas Expertise in interactions of relativistic electrons with crystaline materials
Impact New He photodisintegration experiments using polarized photons and the Glasgow active target
Start Year 2009
Description Lund University 
Organisation Lund University
Department Department of Physics
Country Sweden 
Sector Academic/University 
PI Contribution Provide He active target system for photonuclear research
Collaborator Contribution Maintain tagged photon beam, and central detector systems
Impact PhD Seian al Jebali.....2013 projected Publications 2