Measurement Profiles of Nanoscale Ion Beam for Optimized Radiation Energy Losses - Atomic Nanoscale Technology in the Nuclear Industry - page 77

TABLE 7.1
Organ.Co mpound

ChemicalCompound Density(g/cm 3 )

Pancreas H-11,.C-17, 1.04.(±0.05)

N-2,.O-69,
P-0.4,.S-0.4,
Cl-0.2,.K-0.2

Thyroid H-10,.C-12, 1.05.(±0.05)

N-2,.O-7,
Na-0.2,.Cl-0.2,
K-0.2,.I-0.1

of. Physics. at. Harvard. University. and. promptly. wrote. Radiological. Use. of.
Fast.Protons.(Wilson.1946)..After.that,.various.particles.were.used.for.clinical.
purposes..Higher.mass.ions.have.higher.dose.values,.a.fact.that.was.proiled.
by. the. Heidelberg. Ion-Beam. Therapy. Center. (HIT).. In. the. therapy,. the. ion.
beam. is. sharp. and. does. not. conform. to. the. cancer. cell. shape.. Therefore,. it.
is.very.important.to.design.a.treatment.plan.to.cover.the.entire.cancer.cell.
area..The.Bragg.peak.shows.the.characteristics.of.the.ions.of.interest.for.the.
energy.variable.(Cukier.and.McCullough.2001)..The.position.is.the.depth.of.
the.organ.tissue..The.analysis.includes.the.energy.loss.per.unit.length..The.
angular.frequency.is.shown.in.Equation.(7.1).

1

( ) =

. N ω

1 .

(7.1)

( ) −

exp ω kT

where
N (ω)..=.Frequency.of.phonon.
k = Boltzmann's.constant.

T = Temperature.

This.implies.that.the.thermal.phonon.can.be.made.by.random.energy.luctua-
tions.(Krauth.2006)..In.thermal.equilibrium.and.within.the.harmonic.regime,.
the.probability.of.inding.phonons.in.a.given.state.with.a.given.angular.fre-
quency.is.shown.in.Equation.(7.1)..The.energy.loss.is.calculated.as.a.unit.of.
(eV/Å).in.this.simulation.

7.3 Results
The.ion.beam.interaction.with.the.human.body.is.examined.within.several.
hundreds. of. nanometers.. Figure 7.1. shows. the. ion. interactions. in. pancreas.
tissue..Energy.losses.decrease.as.the.proton.energy.increases..The.difference.