This simple project needs little explanation.

The project is used to check that Kalypso correctly calculates the  relationship
between scattering angle and scattered projectile energy in a binary collision.

The project uses a target that consists of a single atom.

Projectile: 3 keV Ne. Target: K

The  projectile is  incident from  the +z  direction. The  scattering angle  is
obtained as the  sum: 90+ alt,  where alt represents  the antitudinal angle  of
'emission' of the projectile (after scattering).

The table below compares the  simulated results, and also gives  the theoretical
energy that should be observed for the stated scattering angle. The small energy
errors (< 0.03%) can be attributed to integration errors.

impact parameter alt. angle  scat. energy    theor. energy
 0.00000E+0000  9.00000E+0001  3.05650E+0002  [3.0564E2]
 1.00000E-0011  3.60154E-0001  9.50351E+0002  [9.5033E2]
 2.00000E-0011 -3.69819E+0001  1.94749E+0003  [1.9475E3]
 3.00000E-0011 -5.73359E+0001  2.53967E+0003  [2.5395E3]
 4.00000E-0011 -6.93257E+0001  2.80551E+0003  [2.8053E3]

The simulated data are  obtained by applying the  Format Columns command to  the
output file, using the expressions: bx, alt, ke.

Here,  bx  represents  the  impact  parameter,  alt  represents  the altitudinal
'emission'  angle  after  scattering;  ke  represents  the  scattered projectile
energy. (Add 90.0 to alt to get the scattering angle.)

