TY - JOUR
T1 - Induced radioactive nuclides of 10-MeV radiotherapy accelerators detected by using a portable HP-Ge survey meter
AU - Fujibuchi, Toshioh
AU - Obara, Satoshi
AU - Yamaguchi, Ichiro
AU - Oyama, Masaya
AU - Watanabe, Hiroshi
AU - Sakae, Takeji
AU - Katoh, Kazuaki
N1 - Funding Information:
This survey was conducted as a part of the research by the JSRT research group on the control and disposal of radioactive waste and was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Health, Labour and Welfare for research on medical safety and health technology assessment entitled “Research on securing safety of medical radiation” (H19-medical treatment-common-003) (chief researcher: Makoto Hosono).
PY - 2012/1
Y1 - 2012/1
N2 - The radioactivation of linear accelerator components for radiation therapy is interest for radiation protection in general, and particularly, when decommissioning these structures. The energy spectra of gamma rays emitted from the heads of two accelerator models, EXL-15SP and Clinac iX, after 10-MeV X-ray irradiation, were measured using a high-purity germanium semiconductor survey meter. After spectrum analyses, activities of 24Na, 28Al, 54Mn, 56Mn, 57Ni, 58Co, 60Co, 64Cu, 65Zn, 122Sb, 124Sb, 181W, 187W, 196Au, and 198Au were detected. One centimetre deep dose-equivalent rate of the heads of the linear accelerator was measured using the survey meter. The dose rate decreased to ~10 % of its initial rate after 1 week. Long-term activations were few, the radioactivity level was low, and a cooling time of several days was effective for reducing dose rate to an acceptable level for decommissioning.
AB - The radioactivation of linear accelerator components for radiation therapy is interest for radiation protection in general, and particularly, when decommissioning these structures. The energy spectra of gamma rays emitted from the heads of two accelerator models, EXL-15SP and Clinac iX, after 10-MeV X-ray irradiation, were measured using a high-purity germanium semiconductor survey meter. After spectrum analyses, activities of 24Na, 28Al, 54Mn, 56Mn, 57Ni, 58Co, 60Co, 64Cu, 65Zn, 122Sb, 124Sb, 181W, 187W, 196Au, and 198Au were detected. One centimetre deep dose-equivalent rate of the heads of the linear accelerator was measured using the survey meter. The dose rate decreased to ~10 % of its initial rate after 1 week. Long-term activations were few, the radioactivity level was low, and a cooling time of several days was effective for reducing dose rate to an acceptable level for decommissioning.
UR - http://www.scopus.com/inward/record.url?scp=84856153076&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84856153076&partnerID=8YFLogxK
U2 - 10.1093/rpd/ncr005
DO - 10.1093/rpd/ncr005
M3 - Article
C2 - 21317145
AN - SCOPUS:84856153076
SN - 0144-8420
VL - 148
SP - 168
EP - 173
JO - Radiation Protection Dosimetry
JF - Radiation Protection Dosimetry
IS - 2
M1 - ncr005
ER -
