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 WJCMP  Vol.3 No.1 , February 2013
Nanoscale Track Diameter and Hydrogen Yield: Dependence upon Charge State of Incident Ion on Polystyrene
Abstract: The study of radiation damage of high- molecular weight substances due to MeV ion interactions is of interest for engineering and scientific applications. In the present study polystyrene (PS) was irradiated with 107Ag ions of three different charge states (q) 11+, 14+ and 25+ and of 130 MeV energy. The emission of hydrogen from PS was monitored as a function of the incident ion fluence. The experimental results showed that the hydrogen depletion per incident ion from PS varies as qn, where n was found to be 2.1 as compared to the value 2.7 to 3.0 reported in the literature. Radii of the nanometric damaged zones or ion tracks formed were analyzed from the slope of the hydrogen depletion versus ion fluence curves as a function of charge state of incident ion. These have values between 3.2 - 6.8 nm. These radii were found to depend upon the charge state of the incident ion and vary as qm, where m has the value 0.9.  
Cite this paper: D. Gupta, R. Chauhan, S. Kumar, P. Diwan, S. Khan, A. Tripathi, S. Ghosh and V. Mittal, "Nanoscale Track Diameter and Hydrogen Yield: Dependence upon Charge State of Incident Ion on Polystyrene," World Journal of Condensed Matter Physics, Vol. 3 No. 1, 2013, pp. 95-101. doi: 10.4236/wjcmp.2013.31016.
References

[1]   H. G. H. Kumar, R. D. Mathad and S. Ganesh, “ElectronBeam-Induced Modifications in High-Density Polyethylene,” Brazilian Journal of Physics, Vol. 41, No. 1, 2011, pp. 7-14.

[2]   D. P. Gupta, S. Kumar, P. C. Kalsi, V. K. Manchanda and V. K. Mittal, “γ-Ray Modifications of Optical/Chemical Properties of a PVC Polymer,” Radiation Effects and Defects in Solids, Vol. 167, No. 2, 2012, pp. 149-156.

[3]   T. Steckenreiter, E. Balanjat, H. Fuess and C. Trautmann, “Chemical Modifications of PET Induced by Swift Heavy ions,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 131, No. 1-4, 1997, pp. 159-166.

[4]   P. Apel, A. Schulz, R. Spohr, C. Trautmann and V. Vutsadakis, “Tracks of Very Heavy Ions in Polymers,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 131, No. 1-4, 1997, pp. 55-63.

[5]   S. Tsukuda, S. Seki, S. Tagawa, S. Sugimoto and M. Sugimoto, “Effect of Ion Beam Energy and Polymer Weight on the Thickness of Nanowires Produced by Ion Bombardment of Polystyrene Thin Films,” Applied Physics Letters, Vol. 87, No. 23, 2005, p. 233119.

[6]   D. K. Avasthi, J. P. Singh, A. Biswas and S. K. Bose, “Study on Evolution of Gases from Mylar under Ion Irradiation,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 146, No. 1-4, 1998, pp. 504-508.

[7]   V. K. Mittal, S. Lotha and D. K. Avasthi, “Hydrogen Loss under Heavy Ion Irradiation in Polymers,” Radiation Effects and Defects in Solids, Vol. 147, No. 3, 1999, pp. 199-209.

[8]   S. Della-Negra, J. Depauw, H. Joret and Y. Le-Beyec, “H+ Ion Emission from Solid Carbon Foil Bombarded by Multicharged Primary Ions at 0.5 MeV/u and 0.5 KeV/u,” IPN Annual Report, 1990, p. 138.

[9]   Brunelle, S. Della-Negra, J. Depauw, H. Joret, Y. Le Beyec and K. Wien, “Equilibrium Charge State of Fast Heavy Ions in Solids Measurements of Post-Ionizatton Effects,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 43, No. 4, 1989, pp. 484-489.

[10]   Brunelle, S. Della-Negra, J. Depauw, H. Joret and Y. Le Beyec, “A Simple Way to Study Secondary Ion Emission by Heavy Multicharged Ions at Medium Energy (115 keV. Application to Hydrogen Ion Emission,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 43, No. 4, 1989, pp. 586-588.

[11]   P. Hakansson, I. Kamensky and B. Sundqvist, “Fast Heavy-Ion Induced Desorption of Biomolecules,” Nuclear Instruments and Methods in Physics, Vol. 198, No. 1, 1982, pp. 43-51.

[12]   K. Wien, O. Becker, W. Guthier, S. Della-Negra, Y. Le Beyec, B. Monart, K. G. Standing, G. Maynard and C. Deutsch, “The Charge State Dependence of Desorption. A Way to Study the Energy Transfer to the Surface,” International Journal of Mass Spectrometry and Ion Processes, Vol. 78, 1987, pp. 273-304.

[13]   D. P. Gupta, R. S. Chauhan, S. Kumar, P. K. Diwan, S. A. Khan, A. Tripathi, D. K. Avasthi and V. K. Mittal, “Dependence of Hydrogen Released on the Charge State of Incident Ions,” Radiation Effects and Defects in Solids, Vol. 161, No. 6, 2006, pp. 331-338.

[14]   I. Bitensky, E. Parilis, S. Della-Negra and Y. Le Beyek, “Emission of Hydrogen Ions under Multiply Charged Ion Bombardment,” Nuclear Instruments and Methods in Physics Research Se tion B, Vol. 72, No. 3-4, 1992, pp. 380-386.

[15]   M. Most, K. Wien, A. Brunelle, S. Della Negra, J. Depauw, D. Jacquet, M. Pautrat and Y. Le Beyec, “H2+, H3+ and H- Emission by MeV Ion Impact: Charge State Dependence of Energy and Angular Distributions,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 164, 2000, pp. 772-784.

[16]   M. Most, K. Wien, A. Brunelle, S. Della Negra, J. Depauw, D. Jacquet, M. Pautrat and Y. LeBeyec, “H+ Emission by MeV-Ion Impact: Charge State Dependence of Energy and Angular Distributions,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 168, No. 2, 2000, pp. 203-214.

[17]   G. Schiwietz and P. L. Grande, “Improved Charge-State Formulas,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 175, No. 2, 2001, pp. 125-131.

[18]   G. Schiwietz and P. L. Grande, “A Unitary Convolution Approxim Ation for the Impact-Parameter Dependent Electronic Energy Loss,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 153, No. 1-4, 1999, pp. 1-9.

[19]   J. Davenas and P. Thévenard, “Models of the Hydrogen Release from Polymers under Ion Beam Irradiation,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 208, 2003, pp. 170-175.

[20]   L. Calcagno, R. Percolla and G. Foti, “Ion Track Effects on Gel Formation of Polystyrene,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 95, No. 1, 1995, pp. 59-64.

[21]   L. Singh, K. S. samra and R. Singh, “Optical and Structural Modifications in Heavy Ion Irradiated Polystyrene,” Journal of Macromolecular Science, Part B, Vol. 46, No. 4, 2007, pp. 749-759.

[22]   G. K. Mehta and A. P. Patro, “15 UD Pelletron of the Nuclear Science Centre—Status Report,” Nuclear Instruments and Methods in Physics Research Section A, Vol. 268, No. 2-3, 1988, pp. 334-338.

[23]   R. Herrmann, C. L. Cocke, J. Ullrich, S. Hagmann, M. Stoeckli and H. Schmidt-Boecking, ”Charge-State Equilibration Length of a Highly Charged Ion inside a Carbon Solid,” Physical Review A, Vol. 50, No. 2, 1994, pp. 1435-1444.

[24]   S. Winecki, M. P. Stockli and C. L. Cocke, “Rapid Neutralization and Charge Equilibration of Highly Charged Ions at Grazing Incidence on a Surface,” Physical Review A, Vol. 56, No. 1, 1997, pp. 538-542.

[25]   R. Hellhammer, D. Fink and N. Stolterfoht, “Guiding of Highly Charged Ions through Nanocapillaries in PET: Dependence on the Projectile Energy and Charge,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 261, No. 1-2, 2007, pp. 149-152.

[26]   F. Fujimoto, M. Tanaka, Y. Iwata, A. Ootuka, K. Komaki, M. Haba and K. Kobayashi, “Hydrogen Release during Erd Analysis of Hydrogen in Amorphous Carbon Films Prepared by rf-Sputtering,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 33, No. 1-4, 1988, pp. 792-794.

 
 
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