1. I A E A (IAEA); “Technical Data on Nucleonic Gauges”, IAEA-TECDOC-1459 (2005) 1. 2. W Boyes, “Instrumentation Reference Book”; Butterworth-Heinemann (2009). 3. I A E A (IAEA); “Manual on Nuclear Gauges”, IAEA-PRSM-3 (1996) 1. 4. M Falahati, M R Vaziri, A M Beigzadeh, and H Afarideh, J. Instrum. 13, 02 (2018) 02028. 5. P K Bhatnagar and A Nagaratnam, Defence. Sci. J. 37 (1987) 339. 6. M B Holstad, “Gamma-Ray Scatter Methods Applied to Industrial Measurement Systems”, Ph. D. Thesis, University of Bergen (2004). 7. M S Hakim Abad, R Kohi Faygh, and H M Hadi, Iranian J. Phys. Res. 2, 3 (2000) 151. 8. R Izadi-Najafabadi, R Koohi-Fayegh, H Afarideh. Iranian J. Phys. Res. 4, 1 (2003) 13. 9. S T Cousins, T A Jones, J R Brisson, J E McFee, T J Jamieson, E J Waller, F J LeMay, H Ing, E T H Clifford, and E B Selkirk, J. Radioan. Nucl. CH. 235 (1998) 53. 11. H A Beigzadeh, H Afarideh, E A Amirabadi, Z Soltani, and G R Etaati, International Journal of Innovaion and Apllied Studies 4, 2 (2013) 408. 12. W E Shoupp, L M Tichvinsky, “Thickness Gauge for Rolling Mills”, U.S. Patent 2 (1941) 264. 13. H A Froehlich, “Soil Compaction From Logging Equipment: Effects on Growth of Young Ponderosa Pine”. Forest Service, US Department of Agriculture (1979). 14. A M Beigzadeh, M R R Vaziri, Z Soltani, and H Afarideh, Measurement 138 (2019) 157. 15. M Tanaka, G Girard, R Davis, A Peuto, and N Bignell, Metrologia 38, 4 (2001) 301. 17. G F Knoll, “Radiation Detection and Measurement”, John Wiley & Sons (2010). 18. N Tsoulfanidis, “Measurement and Detection of Radiation”, CRC press (2010). 19. R Loxton, P Pope, “Instrumentation: A Reader: A Reader”, Springer Science & Business Media (2012). 20. B G Liptak, “Instrument Engineers' Handbook, Volume One: Process Measurement and Analysis”, CRC press (2003). 21. M J Berger and J H Hubbell, “XCOM: Photon Cross Sections on a Personal Computer”, Natl. Bureau. Stand. (1987). 22. L Gerward, N Guilbert, K B Jensen, and H Levring, Radiat. Phys. Chem. 60, 1-2 (2001) 23. 23. A M El-Khayatt, A M Ali, and V P Singh,. Nucl. Instrum. Methods Phys. Res. 735 (2014) 207. 24. R Biswas, H Sahadath, A S Mollah, and M F Huq, J. Radiat. Res. Appl. Sci. 9, 1 (2016) 26. 25. D W Rankin, “CRC Handbook of Chemistry and Physics”, Edited by David R. Lide, CRC Taylor and Francis Group, Boca Raton (2009).