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beta in the gamma generator in r3ball.C [message #19225]

Mon, 18 April 2016 15:00

Leyla Atar
Messages: 5
Registered: April 2016

occasional visitor

From: *ikp.physik.tu-darmstadt.de

I have a question about the r3bsim. In the file macros/r3b/califa/r3ball.C there is a defined beta in the gamma generator (line no: 337)

gammasGen->SetLorentzBoost(0.819750....) // beta=0.81975 for 700 AMeV

I generate the reaction with the appropriate beam energy, and then I give this as input in the simulation. My question is should I change the SetLorentzBoost every time depending on the simulated beam energy or should I ignore this command line?

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Re: beta in the gamma generator in r3ball.C [message #19228 is a reply to message #19225]

Mon, 18 April 2016 17:45

Hector Alvarez Pol
Messages: 21
Registered: July 2015
Location: Univ. Santiago de Compost...

occasional visitor

From: *red-176-83-220.dynamicip.rima-tde.net

Hi,
The command should be called with the fragments velocity as argument to produce a Lorentz boost in the energies and angles of the gammas.
Let me remember that this generator only generates the gammas and not fragments.

Best regards

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