Decay Curves of NaI (Tl) Scintillators with Different Tl^+ Concentrations under Excitation of Electrons,Alpha Particles and Fission Fragments

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概要

• 論文の詳細を見る

• Decay cturves of Nal(Tl) crystals with Tl" concentr?ttions of' 0.01, 0.07, 0.1 and 0.22 naoIe'7 havebeen rneastrred trnder excitation by photo-electrons f'roraa a ""Cs source, alpha particles frona an"'Alll sotrrce and fission fraguaaents froraa a "'Cf sotrrce. A striking difl'erez'nce between the decaycttrve for electron excitation and those f'or excitation by alplua particles and fission f'ragunents isobserved. A flat top of the decay ctrrve which is oloserxzed trnder electr'on excitation is anarlyzedon the bases of' energy transfer processes of' electrons and Vj. centers to Tl" ions reportedby Dietrich et at. [Phys. Rev. B 8 (1973) 589]. A flat top of tire decay ctmrve f'rom Nal(Tl)with a Tl concentration of 0.01 rnole% trnder alpha particle excitation is also observed. Fasterdecay components of 34:l:5 ns (in addition to the taaain scintill?ttion conaponent of' 1504 l O ns) and1585 ns (in addition to tlae unain couaaponent of l0OflO ns) are obser'ved trnder aljcha particleexcitation and fission fragzment excitation, respectively. This finding indicates the presence of'a non-radiative process of' (Tl")" dtne to interactiozu with excited atorns trnder high specificenergy loss dE/Ax. This non-radiative process shotrld be partly respc>nsilcle to the decrease inscintillation efficiency for high dE/Ax particles.

• 社団法人日本物理学会の論文
• 1999-01-15

著者

• Kubota Shigeyuki

  Department Of Electrical Engineering Nagoya University

• Kubota S

  Rikkyo University

• KUBOTA Shinzou

  Rikkyo University

• SHIRAISHI Fumio

  Institute for Atomic Energy, Rikkyo University

• TAKAMI Yasukiyo

  Institute for Atomic Energy, Rikkyo University

• Takami Yasukiyo

  Institute For Atomic Energy Rikkyo University

• Shiraishi Fumio

  Institute For Atomic Energy Rikkyo University

• Shiraishi Fumio

  Rikkyo University

• Kubota Shinzou

  Institute for Atomic energy,Rikkyo University

関連論文

• Far-Infrared Laser Interferometry Measurements on the STP-3(M) Reversed-Field Pinch
• New Features of the Reversed-Field Pinch Dynamo
• Scintillation Process in NaI(Tl) : Comparison with Scintillation Models : Condensed Matter: Electronic Properties, etc.
• Radiation Damage of NaI (Tl) by Fast Neutron Irradiation:Blocking of the Energy Transfer Prosesses from V_k Centers and Electrons to the Activator of Tl
• Decay Curves of NaI (Tl) Scintillators with Different Tl^+ Concentrations under Excitation of Electrons,Alpha Particles and Fission Fragments

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