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A Study of Energy Absorption and Exposure Buildup Factors in Medicinal Samples
Corresponding Author(s) : Neslihan Ekinci
Asian Journal of Chemistry,
Vol. 28 No. 7 (2016): Vol 28 Issue 7
Abstract
g-Ray energy absorption and exposure buildup factors were computed using the five-parameter geometric progression (G-P) fitting formula for 11 vitamins in the energy range 0.015-15 MeV and for penetration depths up to 40 mfp (mean free path). The generated energy absorption (EABF) and exposure (EBF) buildup factors of vitamins have been studied as a function of penetration depth and incident photon energy. The significant variations in EABF and EBF for vitamins have been observed at the intermediate energy region. It has been concluded that the buildup of photons is less in cobalamin (B12) and is more in b-carotene (vitamin A) compared with other vitamins. Also buildup factors of cobalamin and ascorbic acid, antioxidant vitamins, which have radio protective effects, are minimum. Buildup factors investigated in the present work could be useful in radiation dosimetry and therapy.
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- U. Funegård, I. Johansson, B. Malmer, R. Henriksson and T. Ericson, Eur. J. Cancer, 31A, 2347 (1995); doi:10.1016/0959-8049(95)00400-9.
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- S.P. Singh, T. Singh and P. Kaur, Ann. Nucl. Energy, 35, 1093 (2008); doi:10.1016/j.anucene.2007.10.007.
- Y. Harima, Y. Sakamoto, S. Tanaka and M. Kawai, Nucl. Sci. Eng., 94, 24 (1986).
- J.H. Hubbell, Phys. Med. Biol., 44, R1 (1999); doi:10.1088/0031-9155/44/1/001.
- G.S. Brar, G.S. Sidhu, P.S. Sandhu and G.S. Mudahar, Appl. Radiat. Isot., 49, 977 (1998); doi:10.1016/S0969-8043(97)10104-X.
- L. Gerward, N. Guilbert, K.B. Jensen and H. Levring, Radiat. Phys. Chem., 71, 653 (2004); doi:10.1016/j.radphyschem.2004.04.040.
- M.J. Berger and J.H. Hubbell, XCOM: Photon Cross Sections Database. Web Version 1.2, available at http://physics.nist.gov/xcom; National Institute of Standards and Technology, Gaithersburg, MD 20899, USA, August (1999); Originally published as NBSIR 87-3597.
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- ANSI/ANS-6, 4.3, Gamma Ray Attenuation Coefficient and Buildup Factors for Engineering Materials, American Nuclear Society, La Grange Park, Illinois (1991).
- Y. Harima, Radiat. Phys. Chem., 41, 631 (1993); doi:10.1016/0969-806X(93)90317-N.
- V.P. Singh, N.M. Badiger, N. Chanthima and J. Kaewkhao, Radiat. Phys. Chem., 98, 14 (2014); doi:10.1016/j.radphyschem.2013.12.029.
- S.R. Manohara, S.M. Hanagodimath and L. Gerward, J. Appl. Clin. Med. Phys., 12, 296 (2011); doi:10.1120/jacmp.v12i4.3557.
- V.P. Singh and N.M. Badiger, Radiat. Phys. Chem., 104, 61 (2014); doi:10.1016/j.radphyschem.2013.11.025.
- K.S. Mann and T. Korkut, Ann. Nucl. Energy, 51, 81 (2013); doi:10.1016/j.anucene.2012.08.024.
References
U. Funegård, I. Johansson, B. Malmer, R. Henriksson and T. Ericson, Eur. J. Cancer, 31A, 2347 (1995); doi:10.1016/0959-8049(95)00400-9.
R.S. Al-Meer, O.H.M. El-Habit and A.A. Al-Hazaa, J. King Saud Univ.-Sci., 23, 197 (2011); doi:10.1016/j.jksus.2010.07.009.
C.S. Birch, N.E. Brasch, A. McCaddon and J.H.H. Williams, Free Radic. Biol. Med., 47, 184 (2009); doi:10.1016/j.freeradbiomed.2009.04.023.
G.S. Sidhu, P.S. Singh and G.S. Mudahar, J. Radiol. Prot., 20, 53 (2000); doi:10.1088/0952-4746/20/1/306.
S.P. Singh, T. Singh and P. Kaur, Ann. Nucl. Energy, 35, 1093 (2008); doi:10.1016/j.anucene.2007.10.007.
Y. Harima, Y. Sakamoto, S. Tanaka and M. Kawai, Nucl. Sci. Eng., 94, 24 (1986).
J.H. Hubbell, Phys. Med. Biol., 44, R1 (1999); doi:10.1088/0031-9155/44/1/001.
G.S. Brar, G.S. Sidhu, P.S. Sandhu and G.S. Mudahar, Appl. Radiat. Isot., 49, 977 (1998); doi:10.1016/S0969-8043(97)10104-X.
L. Gerward, N. Guilbert, K.B. Jensen and H. Levring, Radiat. Phys. Chem., 71, 653 (2004); doi:10.1016/j.radphyschem.2004.04.040.
M.J. Berger and J.H. Hubbell, XCOM: Photon Cross Sections Database. Web Version 1.2, available at http://physics.nist.gov/xcom; National Institute of Standards and Technology, Gaithersburg, MD 20899, USA, August (1999); Originally published as NBSIR 87-3597.
F.H. Attix, Introduction to Radiological Physics and Radiation Dosimetry, Introduction to Radiological Physics and Radiation Dosimetry, John Wiley & Sons, New York (1986).
ANSI/ANS-6, 4.3, Gamma Ray Attenuation Coefficient and Buildup Factors for Engineering Materials, American Nuclear Society, La Grange Park, Illinois (1991).
Y. Harima, Radiat. Phys. Chem., 41, 631 (1993); doi:10.1016/0969-806X(93)90317-N.
V.P. Singh, N.M. Badiger, N. Chanthima and J. Kaewkhao, Radiat. Phys. Chem., 98, 14 (2014); doi:10.1016/j.radphyschem.2013.12.029.
S.R. Manohara, S.M. Hanagodimath and L. Gerward, J. Appl. Clin. Med. Phys., 12, 296 (2011); doi:10.1120/jacmp.v12i4.3557.
V.P. Singh and N.M. Badiger, Radiat. Phys. Chem., 104, 61 (2014); doi:10.1016/j.radphyschem.2013.11.025.
K.S. Mann and T. Korkut, Ann. Nucl. Energy, 51, 81 (2013); doi:10.1016/j.anucene.2012.08.024.