Positron annihilation in α-HgI2

Y. F. Nicolau; P. Moser; C. Corbel

doi:10.1016/0168-9002(89)91352-1

Positron annihilation in α-HgI₂

Y. F. Nicolau
, P. Moser
, C. Corbel

Research output: Contribution to journal › Article › peer-review

Abstract

The lifetime of the delocalized positrons in α-HgI₂ crystals is found to be 320±4 ps. Some crystals grown from the vapor phase in an excess of iodine have native mercury vacancies. The lifetime of positrons localized in mercury vacancies is 360±5 ps. Some crystals grown in unstabilized solutions with respect to added iodine show shorter lifetime components of 180-200 ps attributed to positron annihilation inside mercury-rich and/or impurity-rich clusters. Other crystals show both shorter and longer lifetime components than the lifetime in the bulk, indicating the coexistence of mercury vacancies with clusters rich in mercury interstitials and/or impurities. The energy resolution of the γ-ray detectors is correlated to the positron-lifetime spectra of the crystals.

Original language	English
Pages (from-to)	167-171
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	283
Issue number	2
DOIs	https://doi.org/10.1016/0168-9002(89)91352-1
Publication status	Published - 1 Nov 1989
Externally published	Yes

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title = "Positron annihilation in α-HgI2 ",

abstract = "The lifetime of the delocalized positrons in α-HgI2 crystals is found to be 320±4 ps. Some crystals grown from the vapor phase in an excess of iodine have native mercury vacancies. The lifetime of positrons localized in mercury vacancies is 360±5 ps. Some crystals grown in unstabilized solutions with respect to added iodine show shorter lifetime components of 180-200 ps attributed to positron annihilation inside mercury-rich and/or impurity-rich clusters. Other crystals show both shorter and longer lifetime components than the lifetime in the bulk, indicating the coexistence of mercury vacancies with clusters rich in mercury interstitials and/or impurities. The energy resolution of the γ-ray detectors is correlated to the positron-lifetime spectra of the crystals.",

author = "Nicolau, \{Y. F.\} and P. Moser and C. Corbel",

year = "1989",

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T1 - Positron annihilation in α-HgI2

AU - Nicolau, Y. F.

AU - Moser, P.

AU - Corbel, C.

PY - 1989/11/1

Y1 - 1989/11/1

N2 - The lifetime of the delocalized positrons in α-HgI2 crystals is found to be 320±4 ps. Some crystals grown from the vapor phase in an excess of iodine have native mercury vacancies. The lifetime of positrons localized in mercury vacancies is 360±5 ps. Some crystals grown in unstabilized solutions with respect to added iodine show shorter lifetime components of 180-200 ps attributed to positron annihilation inside mercury-rich and/or impurity-rich clusters. Other crystals show both shorter and longer lifetime components than the lifetime in the bulk, indicating the coexistence of mercury vacancies with clusters rich in mercury interstitials and/or impurities. The energy resolution of the γ-ray detectors is correlated to the positron-lifetime spectra of the crystals.

AB - The lifetime of the delocalized positrons in α-HgI2 crystals is found to be 320±4 ps. Some crystals grown from the vapor phase in an excess of iodine have native mercury vacancies. The lifetime of positrons localized in mercury vacancies is 360±5 ps. Some crystals grown in unstabilized solutions with respect to added iodine show shorter lifetime components of 180-200 ps attributed to positron annihilation inside mercury-rich and/or impurity-rich clusters. Other crystals show both shorter and longer lifetime components than the lifetime in the bulk, indicating the coexistence of mercury vacancies with clusters rich in mercury interstitials and/or impurities. The energy resolution of the γ-ray detectors is correlated to the positron-lifetime spectra of the crystals.

UR - https://www.scopus.com/pages/publications/0024772053

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DO - 10.1016/0168-9002(89)91352-1

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AN - SCOPUS:0024772053

SN - 0168-9002

VL - 283

SP - 167

EP - 171

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

IS - 2

ER -

Positron annihilation in α-HgI₂

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