AT.energy.straggling.MeV2.cm2.g: AT.energy.straggling.MeV2.cm2.g

In libamtrack: Computational Routines for Proton and Ion Radiotherapy

Description

Get energy spread with depth according to Bohr's classical theory Bohr, N. (1915), Phil. Mag. 30, 581ff, see also Evans, R.D. (1955), The atomic nucleus, McGraw Hill, New York, p. 661 In the literature dsE2dz is often given in units ergs2/cm. Here we report it mass-normalized MeV2*cm2/g Since the effective charge of the particle enters the equation, particle types and energies have to be given The equation is however limited to energies > 10 MeV/u and not too heavy ions TODO: add William extension for relativistic effects (Williams, E.J. (1945), Revs. Mod. Phys. 17, 217ff)

Usage

AT.energy.straggling.MeV2.cm2.g(E.MeV.u, particle.no, material.no)

Arguments

E.MeV.u	vector of energies of particle per nucleon [MeV] (array of size n) (see also E.MeV.u).
particle.no	type of the particles in the mixed particle field (array of size n) (see also particle.no).
material.no	index number for slab material (see also material.no).

Value

dsE2dz.MeV2.cm2.g

Increase of energy straggling variance sigma.E^2 per unit length of material (array of size n)

See Also

View the C source code here: http://sourceforge.net/apps/trac/libamtrack/browser/tags/0.6.3/src/AT_PhysicsRoutines.c#L301

libamtrack documentation built on May 1, 2019, 6:47 p.m.