Low-energy X-ray attenuation characteristics of Rhizophora spp.composites  

作　　者：Damilola Oluwafemi Samson Ahmad Shukri Mohd Zubir Mat Jafri Rokiah Hashim Mohd Zahri Abdul Aziz Sylvester Jande Gemanam Mohd Fahmi Mohd Yusof 

机构地区：[1]School of Physics,Universiti Sains Malaysia,11800 Gelugor,Penang,Malaysia [2]School of Industrial Technology,Universiti Sains Malaysia,11800 Gelugor,Penang,Malaysia [3]Advanced Medical and Dental Institute,Universiti Sains Malaysia,13200 Bertam,Penang,Malaysia [4]School of Health Sciences,Universiti Sains Malaysia,16150 Kota Bharu,Kelantan,Malaysia

出　　处：《Nuclear Science and Techniques》2021年第3期11-29,共19页核技术（英文）

基　　金：supported by the Universiti Sains Malaysia(USM);the Research University Grant allocation(Nos.304/PFIZIK/6316173,1001/PFIZIK/822173,203/PTEKIND/6711525)。

摘　　要：Photon absorption parameters such as mass attenuation coefficients(μ_m),molar extinction coefficients(ε),total molecular(σ_(t,m)),atomic(σ_(t,a))and electronic(σ_(t,el))cross sections,half-value layers(X_(1/2)),tenth-value layers(X_(1/10)),mean free paths(λ),effective atomic numbers(Z_(eff)),and effective electron densities(N_(el))were estimated for defatted soy flour(DSF),soy protein concentrate(SPC),and soy protein isolate(SPI)-based Rhizophora spp.particleboard composites substituted with 10 wt%sodium hydroxide(NaOH)and 0,5,10,and 15 wt%itaconic acid polyamidoamine-epichlorohydrin(IA-PAE)adhesives.Elemental composition was assessed using ultrahigh-resolution field emission scanning electron microscopy-energy dispersive X-ray spectrometry(UHR-FESEM-EDX).The interaction parameters were evaluated for K_(α1)photons at16.59,17.46,21.21,and 25.26 keV,employing a low-energy germanium(LEGe)detector system and an~(241)Amγ-ray source.X-ray diffraction characterization revealed an amorphous phase in the developed particleboard composites.Samples DSF15',SPC15',and SPI15'exhibited the highest values ofμ_m,ε,σ_(t,m),Zeff,and N_(el)among all of the studied particleboard samples,within the range of measured photon energies.In addition,all of the modified samples exhibited lower X_(1/2),X_(1/10),λ,σ_(t,a),andσ_(t,el)than the unmodified samples,with DSF-,SPC-,and SPI/NaOH/Rhizophora spp./IA-PAE(15 wt%),indicating insignificant changes.The current results of the particleboard samples'analysis can be useful for medical radiation applications and shielding research.

关 键 词：Photon interaction parameters SHIELDING DSF–SPC–SPI PARTICLEBOARDS NaOH/IA-PAE 

分 类 号：TB33[一般工业技术—材料科学与工程] O434.1[机械工程—光学工程]