Absorbed Dose in Water: Comparison of Several Methods Using a Liquid Ionization Chamber

Authors

  • O. Mattsson DEPARTMENT OF RADIATION PHYSICS, SAHLGRENSKA SJUKHUSET, GöTEBORG; THE RADIATION PHYSICS DEPARTMENT, UNIVERSITY OF UMEÅ, UMEÅ, SWEDEN; THE CENTER FOR RADIATION RESEARCH, NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, GAITHERSBURG, MD, USA
  • H. Svensson DEPARTMENT OF RADIATION PHYSICS, SAHLGRENSKA SJUKHUSET, GöTEBORG; THE RADIATION PHYSICS DEPARTMENT, UNIVERSITY OF UMEÅ, UMEÅ, SWEDEN; THE CENTER FOR RADIATION RESEARCH, NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, GAITHERSBURG, MD, USA
  • G. Wickman DEPARTMENT OF RADIATION PHYSICS, SAHLGRENSKA SJUKHUSET, GöTEBORG; THE RADIATION PHYSICS DEPARTMENT, UNIVERSITY OF UMEÅ, UMEÅ, SWEDEN; THE CENTER FOR RADIATION RESEARCH, NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, GAITHERSBURG, MD, USA
  • S. R. Domen DEPARTMENT OF RADIATION PHYSICS, SAHLGRENSKA SJUKHUSET, GöTEBORG; THE RADIATION PHYSICS DEPARTMENT, UNIVERSITY OF UMEÅ, UMEÅ, SWEDEN; THE CENTER FOR RADIATION RESEARCH, NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, GAITHERSBURG, MD, USA
  • J. S. Pruitt DEPARTMENT OF RADIATION PHYSICS, SAHLGRENSKA SJUKHUSET, GöTEBORG; THE RADIATION PHYSICS DEPARTMENT, UNIVERSITY OF UMEÅ, UMEÅ, SWEDEN; THE CENTER FOR RADIATION RESEARCH, NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, GAITHERSBURG, MD, USA
  • R. Loevinger DEPARTMENT OF RADIATION PHYSICS, SAHLGRENSKA SJUKHUSET, GöTEBORG; THE RADIATION PHYSICS DEPARTMENT, UNIVERSITY OF UMEÅ, UMEÅ, SWEDEN; THE CENTER FOR RADIATION RESEARCH, NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, GAITHERSBURG, MD, USA

DOI:

https://doi.org/10.3109/02841869009126550

Keywords:

Absorbed dose, water, cobalt-60, air-ionization-chamber, water calorimetry, ferrous-sulphate dosimeter, comparison

Abstract

In the present investigation a liquid ionization chamber has been used as a transfer instrument for the quantity absorbed dose in water in a cobalt-60 gamma-ray beam. The characteristics of the liquid ionization chamber are described. The transferred dosi-metric information has been compared with absorbed-dose determination using air-ionization-chamber dosimetry, water calori-metry and ferrous-sulphate dosimetry. The agreement between the different measured absorbed-dose values is very good, i.e. within 0.2%. This is an indication that the consistency in the methods used to determine absorbed dose in water is good. The impact of the new standard for air kerma in air, introduced in 1986 by the BIPM, on the air-ionization-chamber dosimetry is investigated. It is shown that any differences in the dosimetry when using the old or the new set of data cancel out for the cobalt-60 beam. The investigation also shows that the value of E, C for the ferrous-sulphate dosimeter recommended in ICRU 35 for electrons can be used also in cobalt-60 beams.

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Published

1990-01-01

How to Cite

Mattsson, O., Svensson, H., Wickman, G., Domen, S. R., Pruitt, J. S., & Loevinger, R. (1990). Absorbed Dose in Water: Comparison of Several Methods Using a Liquid Ionization Chamber. Acta Oncologica, 29(2), 235–240. https://doi.org/10.3109/02841869009126550

Issue

Vol. 29 No. 2 (1990): Acta Oncologica

Section

Articles