Determination of the detection threshold for Polyethylene Terephthalate (PET) Nuclear Track Detector (NTD)

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• 作者：R. Bhattacharyya^a ; S. Dey^a ; Sanjay K. Ghosh^a ; ^b ; A. Maulik^a ; ^{atanu.maulik@jcbose.ac.in" class="auth_mail" title="E-mail the corresponding author} ; Sibaji Raha^a ; ^b ; D. Syam^a
• 关键词：NTD ; PET ; Detection threshold
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2016
• 出版时间：1 March 2016
• 年：2016
• 卷：370
• 期：Complete
• 页码：63-66
• 全文大小：1449 K

文摘

In this work we investigated the detection threshold of the polymer material Polyethylene Terephthalate (PET) intended to be used as Nuclear Track Detector (NTD) in the search for rare events (e.g. strangelets) in cosmic rays. 11 MeV ¹²C and 2 MeV proton beams from the accelerator at the Institute of Physics (IOP), Bhubaneswar were utilized for this study. The results show that the PET detector has a much higher detection threshold (rc">rmulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0168583X16000598&_mathId=si4.gif&_user=111111111&_pii=S0168583X16000598&_rdoc=1&_issn=0168583X&md5=d0ae3a2a2a474197e60a6f0f35d69218" title="Click to view the MathML source">Z/β∼140r hidden">roll">row>Z/β∼140row>) compared to many other commercially available and widely used detector materials like CR-39 (rc">rmulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0168583X16000598&_mathId=si5.gif&_user=111111111&_pii=S0168583X16000598&_rdoc=1&_issn=0168583X&md5=a7cb51342107f34492d235962f30e6bc" title="Click to view the MathML source">Z/β∼6–20r hidden">roll">row>Z/β∼6–20row>) or Makrofol (rc">rmulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0168583X16000598&_mathId=si6.gif&_user=111111111&_pii=S0168583X16000598&_rdoc=1&_issn=0168583X&md5=502d7d99bda3fe81858c8eb66113c7b5" title="Click to view the MathML source">Z/β∼57r hidden">roll">row>Z/β∼57row>). This makes PET a particularly suitable detector material for testing certain phenomenological models which predict the presence of strangelets as low energy, heavily ionizing particles in cosmic radiation at high mountain altitudes.