Studies of the o-Ps lifetime and free volume in ion irradiated Makrofol-KG polycarbonate by positron annihilation

R Kumar, SA Ali, U De, AH Naqvi, SK Chaudhary… - Radiation …, 2008 - Elsevier
Passage of energetic heavy ions produces damage in a polymeric material resulting into the
creation of latent tracks due to dissociation of bonds, cross-linking, formation of free radicals …

Study of ion induced modification in Makrofol-KG polycarbonate by positron annihilation lifetime measurements

R Kumar, R Prasad - 2006 - nopr.niscpr.res.in
Latent ion tracks produced in the polymers due to the damage produced by the passage of
swift heavy ions contain amorphous material with highest degree of disorder, changing the …

Ion induced modification in free volume in PN-6 and PES polymers by positron annihilation lifetime studies

R Kumar, R Prasad - Nuclear Instruments and Methods in Physics …, 2007 - Elsevier
The irradiation of polymeric materials with swift heavy ions (SHI) results in a change of their
free volume properties which have strong correlation with their macroscopic properties …

[PDF][PDF] Positron Annihilation Lifetime Measurements for C5+ Ion Irradiated Makrofol-N Polycarbonate

R Kumar, BK Nath, D Das, R Prasad - Indian Journal of Physics, 2004 - arxiv.iacs.res.in
Pnivcarbonatc (PC), or specifically polycarbonate of bisphenol IS an amorphous polymer
with attractive engineering pinpcrtics, including high impact strength, low moisture …

70 MeV Carbon C5+ ion induced modification in polystyrene by positron annihilation

R Kumar, R Prasad - Radiation measurements, 2005 - Elsevier
Polystyrene is the radiation resistant polymer and occupies a unique position in the study of
radiation effects. The bombardment with swift heavy ions (SHI) results in the change of free …

SHI induced modification in CR-39 polycarbonate by positron annihilation lifetime studies

R Kumar, S Rajguru, D Das, R Prasad - Radiation measurements, 2003 - Elsevier
CR-39 is a polycarbonate widely used as SSNTD for recording nuclear charged particles
and in other applications. Latent ion tracks produced in the polymers due to the damage …

Free volume evolution in 50 MeV Li3+ ion-irradiated polymers studied by positron annihilation lifetime spectroscopy

P Singh, R Kumar, R Prasad - Radiation Effects and defects in …, 2013 - Taylor & Francis
This article is aimed at studying the effect of ion irradiation on free volume of
polyethersulphone (PES) and polyamide nylon-6 (PN-6) polymers by positron annihilation …

Nano scale free volume study of 70 MeV carbon C5+ ion induced modification in Makrofol‐KL polycarbonate by positron annihilation

R Kumar, R Prasad - physica status solidi c, 2009 - Wiley Online Library
Latent ion tracks produced in the polymers due to the damage produced by the passage of
swift heavy ions (SHI) contain amorphous material with highest degree of disorder, resulting …

Nano scale free volume study of high energy (MeV) ion beam irradiated polyamide nylon-6 polymer

R Kumar - 2010 - nopr.niscpr.res.in
Characterization of the effect of energetic high energy heavy ion irradiation on free-volume
parameters in polyamide nylon-6 polymer has been studied by positron annihilation lifetime …

Free volume study of 70 MeV carbon induced modification in polymers through positron annihilation

R Kumar, SA Ali, AK Mahur, D Das, AH Naqvi… - Nuclear Instruments and …, 2006 - Elsevier
Free volume properties of polymers have strong correlation with macroscopic properties and
can be modified by radiations and ions. Positron annihilation lifetime spectroscopy (PALS) …