In order to carry out the measurement of heavy nuclei in accelerator mass spectrometry, characteristic X-rays of the incident projectile have been explored and used as a method for isobar discrimination. The projectil...In order to carry out the measurement of heavy nuclei in accelerator mass spectrometry, characteristic X-rays of the incident projectile have been explored and used as a method for isobar discrimination. The projectile X-ray combined with AMS technique has been set up in China institute of Atomic Energy. The measurement of 79Se was performed by resorting to the projectile X-ray AMS technique and the detection sensitivity of 79Se was improved more than 2 orders of magnitude. The detection limit was about 3.6x 10-9 for 79Se/Se.展开更多
So far accelerator mass spectrometry （AMS） technique has been used for the determination of numbers of important long-lived radioisotopes, such as <sup>10</sup>Be, <sup>14</sup>C, <sup>...So far accelerator mass spectrometry （AMS） technique has been used for the determination of numbers of important long-lived radioisotopes, such as <sup>10</sup>Be, <sup>14</sup>C, <sup>26</sup>Al, <sup>36</sup>Cl, <sup>41</sup>Ca and <sup>129</sup>I, in their applications of geoscienee, environmental science, archaeology and biomedical research. It is interesting to determine <sup>79</sup>Se with AMS technique for its potential application in biomedical research and environmental science presently. The published half-life values of <sup>79</sup>Se are more than 2 orders of magnitude apart, ranging from 10<sup>3</sup> to 10<sup>6</sup> a. The uncertainty of the half life has been an obstacle to the <sup>79</sup>Se application as a tracer. Selenium is one of the impor-展开更多
基金the Nation Natural Science Foundation of China China Nuclear Industry Corporation
文摘In order to carry out the measurement of heavy nuclei in accelerator mass spectrometry, characteristic X-rays of the incident projectile have been explored and used as a method for isobar discrimination. The projectile X-ray combined with AMS technique has been set up in China institute of Atomic Energy. The measurement of 79Se was performed by resorting to the projectile X-ray AMS technique and the detection sensitivity of 79Se was improved more than 2 orders of magnitude. The detection limit was about 3.6x 10-9 for 79Se/Se.
文摘So far accelerator mass spectrometry （AMS） technique has been used for the determination of numbers of important long-lived radioisotopes, such as <sup>10</sup>Be, <sup>14</sup>C, <sup>26</sup>Al, <sup>36</sup>Cl, <sup>41</sup>Ca and <sup>129</sup>I, in their applications of geoscienee, environmental science, archaeology and biomedical research. It is interesting to determine <sup>79</sup>Se with AMS technique for its potential application in biomedical research and environmental science presently. The published half-life values of <sup>79</sup>Se are more than 2 orders of magnitude apart, ranging from 10<sup>3</sup> to 10<sup>6</sup> a. The uncertainty of the half life has been an obstacle to the <sup>79</sup>Se application as a tracer. Selenium is one of the impor-
