From: Joseph Comfort (Joseph.Comfort@asu.edu)
Date: Sat Apr 14 2007 - 06:46:19 CEST
I am looking at particle production from 12.9-GeV/c protons incident on a
Pt target (8 mm diam. by 6 cm long). The Release Notes indicate that the
card PHYSICS...PEATHRESH is intended to provide better physics, especially
for thin targets, but is still under development. I have made some
comparisons with and without the option. Lists of particle productions
are given below. The number of produced particles with the card is larger,
for almost every species, that without the card. I do not see a lot of
difference in, for example, the neutron spectra, but there is some.
My question is whether the PEATHRESH option is sufficiently reliable to
use for studies of beam lines, detector responses, etc. Initially, the
flux of particles is not too important, but we will later wish to have
pretty good estimates of the fluxes (as well as one can manage in the
absence of a good body of constraining data).
Thank you.
Joe Comfort
-------------------------------------
No PHYSICS...PEATHRESH
IDpart Number
gamma 107454
e+ 3133
e- 3415
ntrno 0
mu+ 38
mu- 28
pi0 0
pi+ 3562
pi- 2600
K0L 143
K+ 237
K- 67
n 8890
p 131225
pbar 8
K0S 0
eta 0
Lamda 21
Sig+ 0
Sig0 0
With PHYSICS...PEATHRESH
IDpart Number
gamma 161114
e+ 4641
e- 4934
ntrno 0
mu+ 50
mu- 50
pi0 0
pi+ 5160
pi- 3807
K0L 178
K+ 318
K- 62
n 9608
p 130250
pbar 1
K0S 0
eta 0
Lamda 64
Sig+ 0
Sig0 0
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