Bochum 1998 – scientific programme

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HK: Hadronen und Kerne

HK 66: Hadronic Probes VII, Bremsstrahlung

HK 66.5: Talk

Thursday, March 19, 1998, 15:30–15:45, G

Radiative capture of protons by deuterons — •S. Schadmand^1,2,3, J.C.S. Bacelar¹, M.J. van Goethem^1,3, M.N. Harakeh¹, M. Hoefman^1,3, H. Huisman¹, N. Kalantar-Nayestanaki¹, A. Kugler^4,3, H. Löhner^1,3, J.G. Messchendorp¹, R.W. Ostendorf^1,3, M. Seip¹, R. Simon^5,3, M. Volkerts¹, V. Wagner^4,3, and H.W. Wilschut^1,3 — ¹KVI, Groningen — ²Univ. Giessen — ³for the Taps Collaboration — ⁴NPI, Řež u Prahy — ⁵GSI, Darmstadt

A number of nucleon–nucleon bremsstrahlung measurements below the particle-production threshold has been performed at KVI,Groningen. The goal is to provide a complete and high–accuracy measurement of cross sections and analyzing powers of the production of high-energy photons in the most fundamental processes. These are pp and pn scattering where the latter case is extracted from pd scattering–measurements. This contribution focuses on d(p,γ)³He radiative capture as this process represents one of the important channels in pd bremsstrahlung.

The experimental setups used included the proton detection system SALAD coupled to the segmented γ-ray detection system TAPS. Photons from radiative capture are recognized in γ singles spectra as E_γ is fixed kinematically. Coincident ³He detection is strongly limited by the opening angle of SALAD. Inclusive and coincidence cross sections and analyzing powers for both experimental configurations will be presented and compared to calculations.