Message: Re: Creation of Neutrons for a 1.94MeV Proton beam Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

None Re: Creation of Neutrons for a 1.94MeV Proton beam 

Forum: Physics List
Re: Question Creation of Neutrons for a 1.94MeV Proton beam (Alan Shippen)
Date: 28 Jul, 2008
From: Alan Shippen <Alan Shippen>

Hello, I'm still having problems with this... I've tried looking at the various cross section tables, which has thrown up two questions:

Firstly, What format is the G4NDL tables produced in? is it the ENDF-6 format, i cant tell if it is.

Secondly, when I use QGSP_BIC_HP no neutrons are produced even after a 100,000,000 proton history run; aimed directly at the target. The ENDF entry for this Li-7(p,n) reaction is as follows:

Cross Section

1.880300+6 0.000000+0 1.881000+6 5.301900-2 1.882000+6 9.483900-2 328 3 50 4 1.883000+6 1.185600-1 1.884000+6 1.357300-1 1.885000+6 1.492700-1 328 3 50 5 1.886000+6 1.604500-1 1.887000+6 1.699500-1 1.888000+6 1.782000-1 328 3 50 6 1.889000+6 1.854500-1 1.890000+6 1.919100-1 1.895000+6 2.162000-1 328 3 50 7 1.900000+6 2.324100-1 1.905000+6 2.440900-1 1.910000+6 2.528900-1 328 3 50 8 1.915000+6 2.597400-1 1.920000+6 2.652000-1 1.930000+6 2.732700-1 328 3 50 9 1.940000+6 2.788900-1 1.950000+6 2.829800-1 1.960000+6 2.861100-1 328 3 50 10 1.970000+6 2.886300-1 1.980000+6 2.907800-1 1.990000+6 2.927600-1 328 3 50 11

Angular/Energy Distr

0.000000+0 1.920000+6 0 0 6 6 328 6 50 39 -3.369800-2 2.783200-3 3.135900-5 1.205500-6-3.014200-9-5.22360-11 328 6 50 40 0.000000+0 1.930000+6 0 0 6 6 328 6 50 41 -3.987200-2 3.434800-3 4.832100-5 2.079400-6-5.720700-9-1.11830-10 328 6 50 42 0.000000+0 1.940000+6 0 0 6 6 328 6 50 43 -4.620800-2 3.993700-3 6.905200-5 3.246900-6-9.594300-9-2.08670-10 328 6 50 44 0.000000+0 1.950000+6 0 0 6 6 328 6 50 45 -5.293700-2 4.444800-3 9.353700-5 4.724000-6-1.470700-8-3.51780-10 328 6 50 46 0.000000+0 1.960000+6 0 0 6 6 328 6 50 47

which clearly shows that at least some neutrons should be produced. Is there any reason why this physics list is NOT producing the expected neutrons?

Any help at all would be greatfully received.

Regards, Alan

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

1 None: Re: Creation of Neutrons for a 1.94MeV Proton beam   (Koi, Tatsumi - 13 Aug, 2008)
(_ None: Re: Creation of Neutrons for a 1.94MeV Proton beam   (Alan Shippen - 13 Aug, 2008)
(_ Feedback: Re: Creation of Neutrons for a 1.94MeV Proton beam   (Gunter Folger - 14 Aug, 2008)
 Add Message Add Message
to: "Re: Creation of Neutrons for a 1.94MeV Proton beam"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews


[ Geant 4 Home | Geant 4 HyperNews | Search | Request New Forum | Feedback ]