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Chinese Physics C> 2008, Vol. 32> Issue(S2) : 210-213 

A Bragg curve detector and its application in AMS measurements for medium-weight nuclides

  • The schematic layout and principle of a Bragg curve detector were showed in this paper. A Bragg curve detector was systemically modified and its performance was improved. The total energy resolution of the detector is 0.9% for alpha particle at energy of 5.48 MeV from 241Am source, and the Bragg Peak resolution is 1.6%. Measurement of medium-weight nuclides by using the Bragg curve detector were carried at CIAE-AMS system. series of 36Cl and 41Ca standard samples were measured. The results showed that this Bragg curve detector could clearly identify isobars 36Cl-36S and 41Ca-41K. The results also showed that the ΔZ/Z of 1/47, corresponding to Bragg Peak resolution is 2.1% at ion atomic number of about 16. The Bragg curve detector can be successfully used for AMS measurement.
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    [1] . Bennett C L. Beukens R P. Clover M R et al. Science, 1977,198(4316): 508-5102. Nelson D E. Korteling R G. Stott W R. Science, 1977,198(4316): 507-5083. JIANG Song-Sheng. JIANG Shan. MA Tei-Jun et al. Nucl.Instum. Methods B, 1990, 52: 285-2894. Cruhn C R et al. Nucl. Instrum. Methods, 1982, 196: 33-405. XIE Yuan-Xiang, WANG Xiao-Ming, ZHU Yong-Tai. Nu-clear Techniques, 1987, 2: 41-44(in Chinese) 6. LI Zu-Yu, LIU Guo-Xing, FAN Zhi-Guo. Nuclear Tech-niques, 1987, 4: 19-22 (in Chinese)7. Tripathi A et al. Nucl. Instrum. Methods B, 1997, 192:423-4288. Santos G M et al. Nucl. Instrum. Methods B, 2000, 172:310-3159. LI Guo-Jiang, HE Ming, GUAN Yong-Jing et al. AtomicEnergy Science and Technology, 2005, 39(5): 458-462(in Chinese)

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LI Chao-Li, WANG Wei, HE Ming, WU Shao-Yong, Shen Hong-Tao, JIANG Shan and RUAN Xiang-Dong. A Bragg curve detector and its application in AMS measurements for medium-weight nuclides[J]. Chinese Physics C, 2008, 32(S2): 210-213.
LI Chao-Li, WANG Wei, HE Ming, WU Shao-Yong, Shen Hong-Tao, JIANG Shan and RUAN Xiang-Dong. A Bragg curve detector and its application in AMS measurements for medium-weight nuclides[J]. Chinese Physics C, 2008, 32(S2): 210-213. shu
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Received: 2008-07-17
Revised: 1900-01-01
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A Bragg curve detector and its application in AMS measurements for medium-weight nuclides

    Corresponding author: LI Chao-Li,
  • Received Date: 2008-07-17
  • Accepted Date: 1900-01-01
  • Available Online: 2008-01-03

Abstract: The schematic layout and principle of a Bragg curve detector were showed in this paper. A Bragg curve detector was systemically modified and its performance was improved. The total energy resolution of the detector is 0.9% for alpha particle at energy of 5.48 MeV from 241Am source, and the Bragg Peak resolution is 1.6%. Measurement of medium-weight nuclides by using the Bragg curve detector were carried at CIAE-AMS system. series of 36Cl and 41Ca standard samples were measured. The results showed that this Bragg curve detector could clearly identify isobars 36Cl-36S and 41Ca-41K. The results also showed that the ΔZ/Z of 1/47, corresponding to Bragg Peak resolution is 2.1% at ion atomic number of about 16. The Bragg curve detector can be successfully used for AMS measurement.

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