title: Neutron kerma factors and water equivalence of some tissue substitutes.
abstract: The Kerma factors and Kerma relative to the air and water of 24 compounds that are used as tissue substitutes were calculated for neutron energies ranging from 2.53×10(-8) to 29 MeV. The Kerma ratios of the tissue substitutes relative to air and water were calculated. The water equivalence of the selected tissue substitutes was observed above neutron energies of 100 eV. The Kerma ratio relative to the air for poly-vinylidene fluoride and Teflon were nearest to unity at very low energy (up to 1 eV) and above 63 eV, respectively. It was found that the natural rubber was a water-equivalent tissue substitute compound. The results of the Kerma factors in our investigation show good agreement with those published in ICRU-44. We found that at higher neutron energies, the Kerma factors and Kerma ratios of the selected tissue substitute compounds were approximately the same, but though the differences were large for energies below 100 eV.
authors.affiliation: Department of Physics, Karnatak University, Dharwad 580003, India; Health Physics Section, Kaiga Atomic Power Station-3&4, NPCIL, Karwar 581400, India. Electronic address: kudphyvps@rediffmail.com.
authors.forename: V P
authors.initials: VP
authors.lastname: Singh
authors.affiliation: Department of Physics, Karnatak University, Dharwad 580003, India.
authors.forename: N M
authors.initials: NM
authors.lastname: Badiger
authors.affiliation: Unidad Academica de Estudios Nucleares, Universidad Autonoma de Zacatecas, C. Cipres 10, Fracc. La Penuela, 98068 Zacatecas, Zac., Mexico. Electronic address: fermineutron@yahoo.com.
authors.forename: Hector Rene
authors.initials: HR
authors.lastname: Vega-Carrillo
mesh_terms: D000818:Animals; D040761:Biomimetic Materials / Q000737:chemistry* / Q000528:radiation effects; D003198:Computer Simulation; D004735:Energy Transfer; D006801:Humans; D008954:Models, Biological; D008956:Models, Chemical; D009502:Neutrons; D011829:Radiation Dosage; D012408:Rubber / Q000737:chemistry* / Q000528:radiation effects; D012542:Scattering, Radiation; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water; D012408:Rubber
keywords: KERMA; Neutron; Tissue substitute; Water equivalence