Study of the Positronium Peak in the Angular Correlation Curve of NaF Crystal

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概要

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• Positron annihilation 2y angular correlation curve of NaF has bee?? measuredat temperatures ranging from 4.5 K to 300 K. The temperature depeuadence ofthe narrow peaks originating from the self-annihilation of singlet j:?ositronium(Ps) is analysed. In the lower temperature region, the peak width inc:reases in arate that shows the Ps is in free state with the effective mass 1.5 :[:0.2 ti?nes heavierthan the bare mass. At temperatures higher than 150 K, tlae peak widl:h increasesmore rapidly than in the lower term)cerature region, which indicates thatt a numberof the Ps are trapped in some localized state.

• 社団法人日本物理学会の論文
• 1980-12-15

著者

• HYODO Toshio

  Institute of Physics,College of Arts and Sciences,University of Tokyo

• Hyodo Toshio

  Institute Of Physics College Of Arts And Sciences University Of Tokyo

• TAKAKUSA Yasuo

  Institute of Physics,College of General Education,University of Tokyo

• Takakusa Yasuo

  Institute Of Physics College Of General Education University Of Tokyo

• Takakusa Yasuo

  Institute Of Physics College Of General Education University Of Tokyo:hitachi Medical Corporation

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• An Examination of the Angular Correlation of Annihilation Radiation in Silicon Single Crystal
• Study of Umklapp Annihilation of Positrons in Copper by Means of Rotating-Specimen Method
• Positron Polarons and Positron Trapping by Defects in LiF
• Effect of the Diffraction of Annihilation γ-Rays on Their Angular Correlation in a Single Crystal Specimen
• Study of the Positronium Peak in the Angular Correlation Curve of NaF Crystal
• Direct Observaion of Delocalized Positronium in KCI
• Positron Annihilation in [fe(ptz)_6](BF_4)_2 and [Zn(ptz)_6](BF_4)_2 Single Crystals Studied with One-Dimensional Angular Correlation of Annihilation Radiation
• On the Existence of Delocalized Positronium in NaF at Room Temperature
• A Liquid Helium Cryostat for Positron Annihilation 2_γ Angular Correlation Measurements
• Evidence for Positronium-Like States in NaF and NaCl
• Comments on the Diffraction Effect in Positron Annihilation
• A Lattice Effect on the Enhancement of the Partial Annihilation Rate Inferred from a Numerical Computation on a Nonspherical Fermi Surface
• Enhancement of Annihilation Rate of Electron-Positron Pairs in Periodic Fields

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