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differential cross section [message #17688] Fri, 19 December 2014 22:06 Go to next message
elder1 is currently offline  elder1
Messages: 1
Registered: December 2014
occasional visitor
From: 212.244.23*
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.
Re: differential cross section [message #17729 is a reply to message #17688] Mon, 12 January 2015 16:05 Go to previous message
Ingo Froehlich is currently offline  Ingo Froehlich
Messages: 167
Registered: March 2004
Location: IKF - Frankfurt
first-grade participant
From: *x-matter.uni-frankfurt.de
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


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Ingo Froehlich
IKF - University of Frankfurt
069-798-47027, FAX: -47024
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