GSI Forum - RDF feed
type: channel
description: GSI Helmholtzzentrum für Schwerionenforschung
items: differential cross section
items: Re: differential cross section

differential cross section
type: item
description: Greetings, I am new in Pluto and I have the following problem: I am trying to simulate differential cross section distributions which are energy dependent. I have deuteron as a beam and a proton target. As a reaction output I get p+p+n and in an experiment we measure the coincident protons and obtaine the (five-fold) differential cross sections for a given theta prot1, theta prot2 and their relative azimuthanl angle in function of energy. Which model should I use to simulate such distributions ? Thank U very much f or help.
creator: elder1
date: 2014-12-19T21:06:30-00:00

Re: differential cross section
type: item
description: Do you have a coherent breakup reaction, or a quasi-elastic scattering with a spectator? For a coherent reaction, one can use PAngularDistribution (see http://web-docs.gsi.de/~hadeshyp/pluto/v5.42/examples/useAngularDistribu tion.C.html for a demo macro) to model the theta angle in the c.m. system relative to the beam momentum. The 2-dimensional version with TF2 gives the energy dependence (y is the total c.m. energy). For the relative phi distribution, there is no flexible template at the moment existing, but it should be not much work to add one into Pluto
creator: Ingo Fröhlich
date: 2015-01-12T15:05:54-00:00