Mesoporous silica films with varying porous volume fraction: Direct correlation between ortho-positronium annihilation decay and escape yield into vacuum

L. Liszkay; C. Corbel; L. Raboin; J. P. Boilot; P. Perez; A. Brunet-Bruneau; P. Crivelli; U. Gendotti; A. Rubbia; T. Ohdaira; R. Suzuki

doi:10.1063/1.3234381

Mesoporous silica films with varying porous volume fraction: Direct correlation between ortho-positronium annihilation decay and escape yield into vacuum

L. Liszkay
, C. Corbel
, L. Raboin
, J. P. Boilot
, P. Perez
, A. Brunet-Bruneau
, P. Crivelli
, U. Gendotti
, A. Rubbia
, T. Ohdaira
, R. Suzuki

Universite Paris-Saclay
Wigner Research Centre for Physics
CNRS, UMR 7588, INSP
ETH Zurich
URFJ
National Institute of Advanced Industrial Science and Technology

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

Abstract

The behavior of ortho-positronium (o-Ps) in mesoporous silica films implanted with low-energy positrons has been studied as a function of the film porous volume fraction. A lifetime spectrometer allowed determination of o-Ps annihilation decay both inside and outside of the film. A kinetic model is introduced that permits the determination of the yield and rate of escape of o-Ps into vacuum as well as the annihilation decay rate of the trapped o-Ps in the film. It is shown that these undergo a sudden change at a threshold porous volume fraction, above which the o-Ps escape rate to vacuum varies linearly with volume fraction.

Original language	English
Article number	124103
Journal	Applied Physics Letters
Volume	95
Issue number	12
DOIs	https://doi.org/10.1063/1.3234381
Publication status	Published - 1 Jan 2009
Externally published	Yes

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Liszkay, L., Corbel, C., Raboin, L., Boilot, J. P., Perez, P., Brunet-Bruneau, A., Crivelli, P., Gendotti, U., Rubbia, A., Ohdaira, T., & Suzuki, R. (2009). Mesoporous silica films with varying porous volume fraction: Direct correlation between ortho-positronium annihilation decay and escape yield into vacuum. Applied Physics Letters, 95(12), Article 124103. https://doi.org/10.1063/1.3234381

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title = "Mesoporous silica films with varying porous volume fraction: Direct correlation between ortho-positronium annihilation decay and escape yield into vacuum",

abstract = "The behavior of ortho-positronium (o-Ps) in mesoporous silica films implanted with low-energy positrons has been studied as a function of the film porous volume fraction. A lifetime spectrometer allowed determination of o-Ps annihilation decay both inside and outside of the film. A kinetic model is introduced that permits the determination of the yield and rate of escape of o-Ps into vacuum as well as the annihilation decay rate of the trapped o-Ps in the film. It is shown that these undergo a sudden change at a threshold porous volume fraction, above which the o-Ps escape rate to vacuum varies linearly with volume fraction.",

author = "L. Liszkay and C. Corbel and L. Raboin and Boilot, \{J. P.\} and P. Perez and A. Brunet-Bruneau and P. Crivelli and U. Gendotti and A. Rubbia and T. Ohdaira and R. Suzuki",

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doi = "10.1063/1.3234381",

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Liszkay, L, Corbel, C, Raboin, L, Boilot, JP, Perez, P, Brunet-Bruneau, A, Crivelli, P, Gendotti, U, Rubbia, A, Ohdaira, T & Suzuki, R 2009, 'Mesoporous silica films with varying porous volume fraction: Direct correlation between ortho-positronium annihilation decay and escape yield into vacuum', Applied Physics Letters, vol. 95, no. 12, 124103. https://doi.org/10.1063/1.3234381

TY - JOUR

T1 - Mesoporous silica films with varying porous volume fraction

T2 - Direct correlation between ortho-positronium annihilation decay and escape yield into vacuum

AU - Liszkay, L.

AU - Corbel, C.

AU - Raboin, L.

AU - Boilot, J. P.

AU - Perez, P.

AU - Brunet-Bruneau, A.

AU - Crivelli, P.

AU - Gendotti, U.

AU - Rubbia, A.

AU - Ohdaira, T.

AU - Suzuki, R.

PY - 2009/1/1

Y1 - 2009/1/1

N2 - The behavior of ortho-positronium (o-Ps) in mesoporous silica films implanted with low-energy positrons has been studied as a function of the film porous volume fraction. A lifetime spectrometer allowed determination of o-Ps annihilation decay both inside and outside of the film. A kinetic model is introduced that permits the determination of the yield and rate of escape of o-Ps into vacuum as well as the annihilation decay rate of the trapped o-Ps in the film. It is shown that these undergo a sudden change at a threshold porous volume fraction, above which the o-Ps escape rate to vacuum varies linearly with volume fraction.

AB - The behavior of ortho-positronium (o-Ps) in mesoporous silica films implanted with low-energy positrons has been studied as a function of the film porous volume fraction. A lifetime spectrometer allowed determination of o-Ps annihilation decay both inside and outside of the film. A kinetic model is introduced that permits the determination of the yield and rate of escape of o-Ps into vacuum as well as the annihilation decay rate of the trapped o-Ps in the film. It is shown that these undergo a sudden change at a threshold porous volume fraction, above which the o-Ps escape rate to vacuum varies linearly with volume fraction.

U2 - 10.1063/1.3234381

DO - 10.1063/1.3234381

M3 - Article

AN - SCOPUS:70349653369

SN - 0003-6951

VL - 95

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 12

M1 - 124103

ER -

Mesoporous silica films with varying porous volume fraction: Direct correlation between ortho-positronium annihilation decay and escape yield into vacuum

Abstract

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