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 …

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 …

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) …

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 …

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 …

Ion induced effects in polymers

YK Vijay, S Wate, DK Awasthi, D Das, S Ghughre - 2000 - nopr.niscpr.res.in
Polymer films are finding many applications like microfilters for gas separation, water
purification and blood filtration, etc. The effect of irradiation of 85 MeV O+ 6 ions on …

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 …

[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 …

Positron annihilation lifetime and Doppler broadening study in 50 MeV Li3+ ion irradiated polystyrene films

SA Ali, R Kumar, PMG Nambissan, F Singh… - Nuclear Instruments and …, 2010 - Elsevier
Swift heavy ion (SHI) irradiation of polymeric materials results in the change of their free
volume properties which have strong correlation with their macroscopic properties. The …

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 …