Farklı metotlar ile sürekli enerji aralığında toplam foton etkileşimi için farklı tipteki malzemelerin etkin atom numarası ve elektron yoğunluklarının hesaplanması
Etkin atom numarası (Zeff) ve elektron yoğunluğu (Neff) teknik ve endüstriyel uygulamalarda, radyasyon zırhlama tasarımında, soğurma dozu ve foton çoğalma faktörü hesaplamalarında çoklu elementli bir malzemenin radyasyona tepkisini karakterize etmek için kullanılan uygun parametrelerdir. Dolayısıyla, bu parametreleri tartışmasız bir şekilde belirlemek için doğru metodu seçmek çok önemlidir. Bu çalışmada, farklı tipteki malzemelerin etkin atom numarası ve elektron yoğunlukları 1 keV - 100 GeV enerji aralığında toplam foton etkileşimi için doğrudan ve interpolasyon metotları kullanılarak hesaplanmıştır. Ayrıca, metotların uyumluluğu ve uyumsuzlukları tartışılmış ve sonuçlardan, farklı enerji bölgelerinde malzemeler için hesaplamak için kullanılan metotlar arasında önemli farklılıklar gözlenmiştir.
Calculation of effective atomic numbers and electron densities of different types of material for total photon interaction in the continuous energy region via different methods
Effective atomic number (Zeff) and electron density (Neff) are convenient parameters used to characterise the radiationresponse of a multi-element material in the technical and industrial applications, radiation shielding design, absorbeddose and build-up factor calculations. Thus, it is very significant to choose accurate method to determine theseparameters unambiguously. In the present study, effective atomic numbers and electron densities of different types ofmaterials have been calculated by using a direct method and an interpolation method for total photon interaction in theenergy region of 1 keV to 100 GeV. In addition, agreements and disagreements of the used methods have beendiscussed, and from the results, significant variations have been observed between the methods used to compute forthe materials in the different energy regions.
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- G.J. Hine, “The effective atomic numbers of
materials for various gamma interactions”,
Physics Review, 85, 725–737, 1952.
- S.R. Manohara, S.M. Hanagodimath, K.S.
Thind and L. Gerward, “On the effective
atomic number and electron density: a
comprehensive set of formulas for all types
of materials and energies above 1 keV”,
Nucl. Instrum. Methods B, 266, 3906-3912,
2008.
- M. Kurudirek, M. Büyükyıldız, Y. Özdemir,
“Effective atomic number study of
various alloys for total photon interaction in
the energy region of 1 keV-100 GeV”, Nucl.
Instrum. Methods A, 613, 251-256, 2010.
- M. Kurudirek, “Effective atomic numbers
and electron densities of some human tissues
and dosimetric materials for mean energies
of various radiation sources relevant to
radiotherapy and medical applications”,
Radiation Physics and Chemistry, 102, 139-
146, 2014.
- T. Singh, P. Kaur, P.S. Singh, “A study of
photon interaction parameters in some
commonly used solvents”, J. Radiol. Prot,
27, 79–85, 2007.
- M. Kurudirek, M. Aygun, and S.Z.
Erzeneoglu, “Chemical composition,
effective atomic number and electron density
study of trommel sieve waste (TSW),
Portland cement, lime, pointing and their
admixtures with TSW in different
proportions”, Appl. Radiat. Isot, 68, 1006–
1011, 2010.
- O. Içelli, S.Z. Erzenoğlu, R. Boncukoğlu,
“Determination of molecular, atomic,
electronic cross-sections and effective
atomic number of some boron compounds
and TSW”, Nucl. Instrum.Methods B, 266,
3226–3230, 2008.
- I. Han, L. Demir, “Determination of mass
attenuation coefficients, effective atomic and
electron numbers for Cr, Fe and Ni alloys at
different energies”, Nucl. Instrum. Methods
B, 267, 3-8, 2009.
- J. Kaewkhao, J. Laopaiboon, W.
Chewpraditkul, “Determination of effective
atomic numbers and effective electron
densities for Cu/Zn alloy”, JQSRT, 109,
1260-1265, 2008.
- I. Akkurt, “Effective atomic and electron
numbers of some steels at different Energies”, Ann. Nucl. Energy, 36, 1702-
1705, 2009.
- I. Akkurt, A.M. El-Khayatt, “Effective
atomic number and electron density of
marble concrete”, J. Radioanal. Nucl.
Chem., 295, 633-638, 2013.
- S. Gowda, S. Krishnaveni, T. Yashoda, T.K.
Umesh, R. Gowda, “Photon mass attenuation
coefficients, effective atomic numbers and
electron densities of some
thermoluminescent dosimetric compounds”,
Pramana J. Phys, 63, 529-541, 2004.
- S. Gowda, S. Krishnaveni, R. Gowda,
“Studies on effective atomic numbers and
electron densities in amino acids and sugars
in the energy range 30-1333 keV”, Nucl.
Instrum. Methods B, 239, 361-369, 2005.
- O. Içelli, Z. Yalçin, M. Okutan, R.
Boncukçuoglu , A. Sen, “The determination
of the total mass attenuation coefficients and
the effective atomic numbers for
concentrated colemanite and Emet
colemanite clay”, Ann. Nucl. Energy, 38,
2079-2085, 2011.
- Y. Elmahroug, B. Tellili, C. Souga,
“Determination of total mass attenuation
coefficients, Effective atomic numbers and
electron densities for different shielding
materials”, Ann. Nucl. Energy, 75, 268-274,
2015.
- L. Demir L, I. Han, “Mass atternuation
coefficients, effective atomic numbers and
electron densities of undoped and differently
doped GaAs and InP crystals”, Ann. Nucl.
Energy, 36, 869-873, 2009.
- S.R. Manohara, S.M. Hanagodimath. L.
Gerward, “The effective atomic numbers of
some biomolecules calculated by two
methods: A comparative study”, Med. Phys.,
36, 137-141, 2009.
- Atomic weights of the elements, IUPAC,
2007. The table is based on the 2005 table at
Pure Appl. Chem., 78, 2051–2066 (2006)
with 2007 changes to the values for lutetium,
molybdenum, nickel, ytterbium and zinc.
.
- L. Gerward, N. Guilbert, K.B. Jensen. H.
Levring, “X-ray absorption in matter.
Reengineering XCOM”, Radiat.Phys.
Chem., 60, 23-24, 2001.
- L. Gerward, N. Guilbert, K.B. Jensen. H.
Levring, “WinXCom- a program for
calculating X-ray attenuation coefficients”,
Radiat.Phys. Chem., 71, 653-654, 2004.
- K.S. Mann, A. Rani, M.S. Heer, “Shielding
behaviors of some polymer and plastic
materials for gamma-rays”, Radiat.Phys.
Chem., 106, 247-254, 2015.
- M. Tapan, Z. Yalçın, O. İçelli, H. Kara, S.
Orak, A. Özvan, T. Depeci, “Effect of
physical, chemical and electro-kinetic
properties of pumice samples on radiation
shielding properties of pumice material”,
Ann. Nucl. Energy, 65, 290-298, 2014.