Abstract:
:Neutron dose is transferred to biological materials through the recoil protons produced by elastic scattering. When a low-velocity proton collides with the atoms or molecules of a target, it changes to a hydrogen atom by electron capture; this hydrogen atom then changes to a proton by losing the electron. Because the hydrogen atom has a different ionization cross section from that of a proton, the charge exchange processes need to be considered to calculate stopping power for low energy protons. The proton neutralization effect has been simulated by using a proton track structure code developed by taking into account charge exchange processes. The microdosimetric spectrum for 1 MeV neutrons was calculated by assuming a continuous slowing down approximation (csda) and the results of the proton track code. It was found that hydrogen atoms after proton neutralized by electron capture contribute about 24% to neutron dose.
journal_name
J Radiat Resjournal_title
Journal of radiation researchauthors
Endo Sdoi
10.1269/jrr.45.351keywords:
subject
Has Abstractpub_date
2004-09-01 00:00:00pages
351-5issue
3eissn
0449-3060issn
1349-9157pii
JST.JSTAGE/jrr/45.351journal_volume
45pub_type
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