Summary
Measurements on water and ice at several temperatures down to −144 °C have been performed using the standard set-up of the linear detectors of positron annihilation radiation. The nature of the narrow component that changes with temperature or state is studied. The shape of such a component is evaluated by simplified theoretical calculations. Positronium formation and its decay modes are discussed quantitatively.
Riassunto
Sono state fatte misure sull’acqua e sul ghiaccio a varie temperature fino a - 144 °C usando il dispositivo « standard » dei rivelatori estesi della radiazione di annichilamento del positrone. È stato notato che la componente stretta si restringe “bruscamente tra − 18° e − 25 °C. Sono riportati alcuni calcoli approssimati allo scopo di interpretare le varie oomponenti in oui si possono risolvere le curve sperimentali.
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References
L. A. Page, M. Heimberg, J. Wallace andT. Trout:Phys. Rev.,98, 206 (1955).
A. T. Stewart:Phys. Rev.,99, 594 (1955).
R. L. De Zafra andW. T. Joyner:Phys. Rev.,112, 19 (1958).
P. Colombino, S. De Benedetti, I. Degregori andL. Trossi:Nuovo Cimento,8, 508 (1958).
L. A. Page andM. Heimberg:Phys. Rev.,102, 1545 (1956).
G. Iaci, I. F. Quercia andE. Turrisi:Nuovo Cimento,24, 746 (1962).
G. Fabri, E. Germagnoli, I. F. Quercia andE. Turrisi:Nuovo Cimento,30, 21 (1963).
P. Colombino, B. Fiscella andL. Teossi:Nuovo Cimento,27, 589 (1963).
P. Colombino, B. Fiscella andL. Trossi:Nuovo Cimento,31, 950 (1964).
L. G. Lang andS.De Benedetti:Phys. Rev.,108, 941 (1957).
S. De Benedetti, C. E. Cowan, W. E. Conneker andH. Primakoff:Phys. Rev.,77, 205 (1950).
A. T. Stewart andR. E. Green:Phys. Rev.,98, 232, 486 (1955).
P. Colombino, I. Degregori, L. Mayrone andL. Trossi:Nuovo Cimento,18, 632 (1960).
W. Brandt, S. Berko andW. W. Walker:Phys. Rev,120, 1289 (1960).
B. Podolsky andL. Pauling:Phys. Rev.,34, 109 (1929).
J. C. Slater:Phys. Rev.,6, 357 (1930).
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This work was partly supported by C.N.R.
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Colombino, P., Fiscella, B. & Trossi, L. Study of positronium in water and ice from 22 to -144 °C by annihilation quanta measurements. Nuovo Cim 38, 707–723 (1965). https://doi.org/10.1007/BF02748591
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DOI: https://doi.org/10.1007/BF02748591