Swift heavy ions on polymers: Hydrocarbon gas release

Picq, V.; Ramillon, J.M.; Balanzat, E.

doi:10.1016/s0168-583x(98)00497-2

Cited by 70 publications

(39 citation statements)

References 14 publications

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“…deformation and H 2 O asymmetric stretching, respectively. It indicates that the above bonds were broken during ion irradiation [17]. The breaking of these bonds paves the way for reactions between the molecules liberated from the irradiated layers of the crystal as shown in Fig.…”

Section: Residual Gasesmentioning

confidence: 92%

“…Similarly, H can also abstract Cl to form HCl. The source of the free H atom is from C-H, N-H, COOH, NH 3 and CH 2 bond breaking processes and also from side chain scissions [17,18] of ion bombarded LAHCl·H 2 O molecule. The observed CO, CO 2 and O 2 are due to the cleavage of COOH and N 2 is due to the N-H, C N, NH 3 bond cleavages of irradiated LAHCl·H 2 O single crystal.…”

Section: Residual Gasesmentioning

confidence: 99%

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Spectral studies on Ag8+ ions irradiated LAHCl·H2O and LAHBr·H2O single crystals

Sangeetha

Babu

Ramamurthi

et al. 2011

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Section: Residual Gasesmentioning

confidence: 92%

Section: Residual Gasesmentioning

confidence: 99%

Spectral studies on Ag8+ ions irradiated LAHCl·H2O and LAHBr·H2O single crystals

Sangeetha

Babu

Ramamurthi

et al. 2011

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…By using high-energy heavy ions, dramatic modifications in the polymer material have been observed. Some of the changes have been attributed to the scissoring of polymer chains by incident ions, breaking of covalent bonds, cross-linking, formation of carbon clustures, liberation of volatile species and in some cases even formation of new chemical bonds [8][9][10][11]. High energy ions by electronic excitation and ionization create tracks, latent tracks in the polymers and also can cause creation of triple bonds [12,13].…”

Section: Introductionmentioning

confidence: 99%

Interaction of oxygen (O+7) ion beam on polyaniline thin films

et al. 2009

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High-energy ion beam irradiation of the polymers is a good technique to modify the properties such as electrical conductivity, structural behaviour and mechanial properties. Polyaniline thin films doped with hydrochloric acid (HCl) were prepared by oxidation of ammonium persulphate. The effect of Swift Heavy Ions irradiation on the electrical and structural properties of polyaniline has been measured in this study. Polyaniline films were irradiated by oxygen ions (energy 80 MeV, charge state O +7 ) with fluence varying from 1 × 10 10 to 3 × 10 12 ions/cm 2 . The studies on electrical and structural properties of the irradiated polymers were investigated by measuring V-I using four probe set-up and X-ray diffraction (XRD) using Bruker AXS, X-ray powder diffractometer. V-I measurements shows an increase in the conductivity of the film, XRD pattern of the polymer shows that the crystallinity improved after the irradiation with Swift Heavy Ions (SHI), which could be attributed to cross linking mechanism.

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“…This happens due to high value of the electronic stopping power or high linear energy transfer (LET) of the ions which induces an unusual density of the electron hole pairs close to ion path. Energetic heavy ions create cylindrical tracks with complex damage structures such as radical formation, main chain scission, intermolecular cross-linking, creation of triple bond and unsaturated bond and loss of volatile fragments [4,5]. The effects of ion irradiations are mostly due to electronic excitations and ionization.…”

Section: Introductionmentioning

confidence: 99%

Dielectric response of makrofol-KG polycarbonate irradiated with 145 MeV Ne6+ and 100 MeV Si8+ ions

Kumar

Ali

et al. 2009

Indian J Phys

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The passage of heavy ions in a track detector polymeric material produces lattice deformations. These deformations may be in the form of latent tracks or may vanish by self annealing in time. Heavy ion irradiation produces modifications in polymers in their relevant electrical, chemical and optical properties in the form of rearrangement of bonding, cross-linking, chain scission, formation of carbon rich clusters and changes in dielectric properties etc. Modification depends on the ion, its energy and fluence and the polymeric material. In the present work, a study of the dielectric response of pristine and heavy ion irradiated Makrofol-KG polycarbonate is carried out. 40 μm thick Makrofol-KG polycarbonate films were irradiated to various fluences with Si 8+ ions of 100 MeV energy from Pelletron at Inter University Accelerator Centre (IUAC), New Delhi and Ne 6+ ions of 145 MeV from Variable Energy Cyclotron Centre, Kolkata. On irradiation with heavy ions dielectric constant ( ) decreases with frequency where increases with fluence for both the ions. Variation of loss factor (tan ) with frequency for pristine and irradiated with Si ions reveals that tan increases as the frequency increases. Tan also increases with fluence. While Ne irradiated samples tan shows slight variation with frequency as well as with fluence. Tan has positive values indicating the dominance of inductive behavior.

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Swift heavy ions on polymers: Hydrocarbon gas release

Cited by 70 publications

References 14 publications

Spectral studies on Ag8+ ions irradiated LAHCl·H2O and LAHBr·H2O single crystals

Spectral studies on Ag8+ ions irradiated LAHCl·H2O and LAHBr·H2O single crystals

Interaction of oxygen (O+7) ion beam on polyaniline thin films

Dielectric response of makrofol-KG polycarbonate irradiated with 145 MeV Ne6+ and 100 MeV Si8+ ions

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