Sains Malaysiana 34(1): 41-43 (2005)

 

Penentuan Faktor Gama untuk satu Radionuklid 60Co

(Determination of Gamma Factor for a 60Co Radionuclide)

 

 

Faridah Lisa Supian

Jabatan Fizik

Fakulti Sains dan Teknologi

Universiti Pendidikan Sultan Idris (UPSI)

35900 Tanjong Malim

Perak Darul Ridzuan

 

 

 

ABSTRAK

 

Badan Tenaga Atom Antarabangsa (IAEA) pada tahun 1992 telah melaporkan faktor gama 60Co, ГIAEA-Co-60 sebagai 0.351 mSv m-2 (GBqj)-1. Eksperimen yang dilakukan di Institut Penyelidikan Teknologi Nuklear (MINT) pada tahun 2003 mendapati faktor gama 60Co, ГEKS-Co-60 sebagai 0.368 + 0.017 mSv m-2 (GBq j)-1. Walaupun perbezaan sebanyak 4.84%, ГEKS-Co-60 dianggap dekat dengan ГIAEA-Co-60, kerana tiga nilai yang dilaporkan sebelum ini mempunyai perbezaan yang lebih besar. Lagipun, julat  ГEKS-Co-60 iaitu 0.351-0.385 merangkumi ГIAEA-Co-60,

 

 

ABSTRACT

 

The International Atomic Energy Agency (IAEA) in 1992 has reported a 60Co gamma factor ГIAEA-Co-60 as 0.351 mSv m-2 (GBq h)-1. Experiments that were carried-out in 2003 at the Malaysian Institute for Nuclear Technology (MINT) obtained a gamma factor,  ГEKS-Co-60 as 0.368 + 0.017 mSv m-2 (GBq j)-1. Despite a difference of 4.84%,   ГEKS-Co-60 is considered closer to   ГIAEA-Co-60 as three previously reported value have recorded a larger difference. In fact, the range of   ГEKS-Co-60 i.e. 0.351-0.385 covers  ГIAEA-Co-60.

 

 

RUJUKAN/REFERENCES

 

Buchler A. 1987a. Certificate No. 100921-6 of sealed radioactive sources, radionuclide: Cobalt-60. DIm. Amersham Buchler, 1987, Operation manual for Calibration OB85/l, Nuclides: Caesium-137, Cobalt-60, Radium-226, Americium-241, Instructions for use. Braunschweig.

Buchler A. 1987b. Operation manual for Calibration OB85/1, Nuclides: Caesium-137, Cobalt-60, Radium-226, Americium­-241, 1nstructions for use. Braunschweig.

Faridah Lisa Supian. 2004. Penentuan faktor gama Co-60. Tesis Sarjanamuda Sains dengan Kepujian, Program Fizik, Universiti Kebangsaan Malaysia.

Knoll, G.F. 1979. Radiation detectation and measurement. New York: John Wiley & Sons.

Lilley, J. S. 2001. Nuclear physics. New York: John Wiley & Sons.

Mahesh, K. & Vij, D. R., 1985. Techniques of radiation dosimetry. New Delhi: Wiley Eastern Limited.

The isotope products, 1998. Registry of radioactive sealed sources and devices safety evaluation of sealed source, http:// www.ipl.isotopeproducts.com/rrssd/i pU04060 122. pdf.

The University of Missouri, 1997. Radionuclide data sheet for Co-60, http://www.missouri .ed u/muehs/draft/newrsm2/Radnuc%20stuff%20in%20PDF/Co%2060%20sheet.PDF.

The University of Sheffield, 2000. Radiation safety organisation anindividualresponsibilities, http://www.shef.ac.uklsafety/ ir /resitriction. html.

Unterweger, M.P. 2002. Half- life measurements at the National Institute of Standards and Technology. Applied Radiation and Isotopes 56: 125-130.

Williams, J.L. & Dunn, T.S. 1979. Radiation sources-gamma; Radiation physics & chemistry, Vol. 13-14. Great Britain: Pergamon Press Ltd.

 

 

 

 

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