Large<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mi>T</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>from the fragmentation of 1.2-GeV/nucleon<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>139</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>nuclei
F.P. BradyDepartment of Physics and Crocker Nuclear Laboratory, University of California, Davis, California 95616W. ChristieDepartment of Physics and Crocker Nuclear Laboratory, University of California, Davis, California 95616J. L. RomeroDepartment of Physics and Crocker Nuclear Laboratory, University of California, Davis, California 95616C. E. TullDepartment of Physics and Crocker Nuclear Laboratory, University of California, Davis, California 95616B. McEachernDepartment of Physics and Crocker Nuclear Laboratory, University of California, Davis, California 95616Michael L. WebbDepartment of Physics and Crocker Nuclear Laboratory, University of California, Davis, California 95616J.C. YoungDepartment of Physics and Crocker Nuclear Laboratory, University of California, Davis, California 95616H. J. CrawfordDepartment of Physics and Crocker Nuclear Laboratory, University of California, Davis, California 95616D. GreinerDepartment of Physics and Crocker Nuclear Laboratory, University of California, Davis, California 95616P. J. LindstromDepartment of Physics and Crocker Nuclear Laboratory, University of California, Davis, California 95616H. SannDepartment of Physics and Crocker Nuclear Laboratory, University of California, Davis, California 95616
1988lv
ABI
Аннотация
The first measurements of the transverse momenta (${p}_{T}$) of heavy projectile fragments produced by fragmentation of 1.2-GeV/nucleon La are presented. The momentum distributions of the fragments (Z\ensuremath{\simeq}26--56) are Gaussians and broader than predicted by models based on internal momenta of the projectile nucleons. The larger ${p}_{T}$ observed do not appear to be due solely to Coulomb effects, but are consistent with a simple model whereby nucleons from the (hot) overlap region recoil collectively into the (colder) projectile fragments. Thus, ${p}_{T}$ and the fragment mass may provide a good indication of the vector impact parameter b.
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