Longitudinal and transverse momentum distributions of 9Li fragments from break-up of 11Li

F Humbert,G Münzenberg,C Scheidenberger,K Grimm,H Irnich,A Magel,E Zude,W Trautmann,H Emling,E Wajda,R Holzmann,G Schrieder,B Franzke,Y Leifels,W Schwab,H Freiesleben,O Klepper,K Riisager,L Johannsen,R Kulessa,Th Blaich,H Klingler,Daniel S Lambrecht ,B M Sherrill ,J Stroth ,H Simon ,K Stelzer ,G Nyman ,M F Mohar ,M Zinser ,P Møller ,A Richter ,F Nickel ,Th W Elze ,A C Mueller ,B Jonson ,D Guillemaud‐Mueller ,L V Chulkov ,P G Hansen ,J V Kratz ,T Nilsson ,H Geißel ,J G Keller ,O Tengblad ,María José García Borge

doi:10.1016/0370-2693(95)00072-s

Abstract

Transverse and longitudinal momentum distributions of 9Li fragments from 11Li break-up reactions in C, Al and Pb targets have been measured at 280 MeV/u. The two-neutron removal cross-section was measured to be σ −2 n = 0.26 ± 0.02 b for the carbon target, σ −2 n = 0.47 ± 0.08 b for the aluminum target and σ −2 n = 1.9 ± 0.4 b for the lead target. No significant difference is observed between the narrow widths (FWHM ≈ 47 MeV/c) of the transverse and longitudinal momentum distributions of the 9Li fragments. The physical implications of this are discussed.

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