返回Google圖書搜尋

Residual Injury Caused by Irradiation with Fast Neutrons

出版	U.S. Naval Radiological Defense Laboratory, 1962
URL	http://books.google.com.hk/books?id=kDA-keckh2wC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋The LD 50 of C[3H female mice for fission-spectrum neutrons was found to be 274.5 #+ 4.2 rad. The previously reported value in the same mice for 250 kvp X ray was 632 rad, giving an RBE of 2.30. Conditioning exposure of the mice to a total neutron dose of 482.3 #+ 7.2 rad over an interval of 8-10 weeks resulted in lowering the LD 50 for neutrons by 41.8 #+ 5.9 rad, or 8.67 #+ 1.23 percent of the total conditioning dose. The previously reported value in the same mice for 250 kvp X ray was 9.58 percent of the conditioning dose. Continued exposure of the mice to 166 rad doses of neutrons at intervals of 4-5 weeks gave a median survival time of 22 weeks. This was greater than that produced by exposure to 420 rad and less than that produced by exposure to 280 rad of 250 kvp X ray given at the same time.