Positronium chemistry of the Ps quenchers adsorbed on to the mesoporous resin
K Sudarshan, PN Patil, A Goswami… - … status solidi c, 2009 - Wiley Online Library
physica status solidi c, 2009•Wiley Online Library
The positron annihilation lifetime studies were carried out on XAD‐4 resin loaded with
different Ps quenchers in sub‐monolayer quantities. The o‐Ps intensity and lifetime of the
longest lived component, corresponding to positronium annihilation in mesopores, were
seen to reduce with adsorption of β‐naphthol. In the case of nitroaniline and nitrobenzene
adsorption, only the intensity of this component reduced. The studies showed that the
physical dimension of the quencher should also be large to manifest as positronium …
different Ps quenchers in sub‐monolayer quantities. The o‐Ps intensity and lifetime of the
longest lived component, corresponding to positronium annihilation in mesopores, were
seen to reduce with adsorption of β‐naphthol. In the case of nitroaniline and nitrobenzene
adsorption, only the intensity of this component reduced. The studies showed that the
physical dimension of the quencher should also be large to manifest as positronium …
Abstract
The positron annihilation lifetime studies were carried out on XAD‐4 resin loaded with different Ps quenchers in sub‐monolayer quantities. The o‐Ps intensity and lifetime of the longest lived component, corresponding to positronium annihilation in mesopores, were seen to reduce with adsorption of β‐naphthol. In the case of nitroaniline and nitrobenzene adsorption, only the intensity of this component reduced. The studies showed that the physical dimension of the quencher should also be large to manifest as positronium quencher when adsorbed on to the porous materials if the porous material has large surface fractals. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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