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Studies of the nano scale voids and free volume in ⁴⁰Ar ion irradiated solid state nuclear track detector by positron annihilation

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Title Studies of the nano scale voids and free volume in ⁴⁰Ar ion irradiated solid state nuclear track detector by positron annihilation
 
Creator Kumar, Rajesh
Prasad, Rajendra
 
Subject Ion beam modification
Makrofol-N polycarbonate film
Positron annihilation lifetime
Nano scale voids
Free volume
 
Description 709-713
The bombardment of the polymeric materials with Swift Heavy Ions (SHI) results in the change of their free volume properties which have strong correlation with macroscopic properties of the polymeric material. Positron Annihilation Lifetime Spectroscopy (PALS) provides direct information about the dimension, content and hole size distribution of free volume in polymers. Makrofol-N polycarbonate films (40 μm) were irradiated with ⁴⁰Ar ions of energy 14.9 MeV/n to the fluences of 10⁵ ions/cm² from UNILAC, GSI Darmstadt, Germany. The effect of ion irradiation on free volume and characterization by Positron Annihilation Lifetime Spectroscopy (PALS) has been studied. Observed lifetime spectra were resolved into three components and o-Ps lifetime component was associated with the pick off annihilation of positronium trapped by the free volume. The o-Ps lifetime and the average free volume are found to increase on irradiation.
 
Date 2008-12-26T05:14:28Z
2008-12-26T05:14:28Z
2008-09
 
Type Article
 
Identifier 0019-5596
http://hdl.handle.net/123456789/2659
 
Language en_US
 
Relation H01F41/30, H01L
 
Publisher CSIR
 
Source IJPAP Vol.46(9) [September 2008]