Damage of swift ions in crystalline calcium fluoride. Evolution of the ion explosion spike into a thermal spike

Young, David A.

doi:10.1016/j.nimb.2006.05.032

Cited by 10 publications

(2 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The agreement in the description of the different track shells in CaF 2 suggests a general correlation of the electron-phonon coupling with the optical band gap energy. 54,59 Moreover such a core-shell structure was predicted by molecular dynamics calculations 125 as a possible track description in CaF 2 . These results improve the understanding of track formation but may also shed light on processes induced by high electronic excitation from femto-second laser pulses.…”

Section: Discussionmentioning

confidence: 95%

Dense and nanometric electronic excitations induced by swift heavy ions in an ionic CaF2crystal: Evidence for two thresholds of damage creation

et al. 2012

View full text Add to dashboard Cite

CaF 2 crystals as representatives of the class of ionic nonamorphizable insulators were irradiated with many different swift heavy ions of energy above 0.5 MeV/u providing a broad range of electronic energy losses (S e ). Beam-induced modifications were characterized by Channeling Rutherford Backscattering Spectrometry (C-RBS) and x-ray diffraction (XRD), complemented by transmission electron microscopy (TEM). Results from C-RBS give evidence of significant damage appearing above a S e threshold of 5 ± 2 keV/nm. A second critical S e appears around 18 ± 3 keV/nm; below this value the damage as function of ion fluence saturates at 20%, while above this the damage saturation level increases with S e , reaching ∼60% for ions of S e = 30 keV/nm. XRD measurements also show effects indicating two threshold values. Above 5 keV/nm, the widths of the XRD reflection peaks increase due to the formation of nanograins, as seen by TEM, while a significant decrease of the peak areas only occurs above 18 keV/nm. The track radii deduced from C-RBS measurements are in agreement with those extracted from the fluence evolution of the widths of the XRD peaks. Moreover, track radii deduced from the peak area analysis are slightly smaller but in agreement with previous track observations by high resolution electron microscopy. Calculations based on the inelastic thermal spike model suggest that the lower threshold at 5 keV/nm is linked to the quenching of the molten phase, whereas the threshold at 18 keV/nm can be interpreted as quenching of the boiling phase. The results of CaF 2 are compared with other nonamorphizable materials such as LiF and UO 2 .

show abstract

Section: Discussionmentioning

confidence: 95%

Dense and nanometric electronic excitations induced by swift heavy ions in an ionic CaF2crystal: Evidence for two thresholds of damage creation

et al. 2012

View full text Add to dashboard Cite

show abstract

“…They did not reappear until 1994 when I was clearing out a filing cabinet and found them in a folder labelled ''Chapman-Enskog Theory of Dense Fluids'', and were eventually published in this journal (Young, 1995). Apart from some very recent attempts to see whether it is even possible to model an ion explosion spike by molecular dynamics, where one gets striking evidence of the speed with which a coulomb explosion developsdwhile everything else is subject to heavy reservations (Young, 2006)dthe decision not to publish my KC1 colouration results in 1959 marked my effective departure from the field. I was in a group ill equipped to study tracks, and the possibility of an academic post at Imperial College, which led to an association with Arthur Moore and the development in 1963 of HOPG, began to look attractive.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

The discovery of solid-state nuclear tracks—A personal memoir from 1956–1959

Young

2009

Radiation Measurements

Self Cite

View full text Add to dashboard Cite

Track‐Etching

Apel¹

2013

Encyclopedia of Membrane Science and Technology

View full text Add to dashboard Cite

Track‐etch membranes (TMs) are produced by irradiating polymer films with highly ionizing particles followed by chemical etching. They differ from most conventional polymeric membranes because of their precisely controlled structure. Their pore size, shape, and density can be varied in a controllable manner to produce membranes with the required retention and transport properties. Polymer films are irradiated with either fission fragments or accelerated ions to form the so‐called latent tracks. The process of track etching then converts the latent tracks into hollow channels. Different etching methods have been developed that allow for the formation of cylindrical, conical, funnel‐like, cigar‐like, and other shapes of track‐etched pores. Commercial TMs are produced from polycarbonate, polyethylene terephthalate and polyimide, and their basic properties are presented in this article. TMs are used for diverse applications such as precise filters, model capillary systems, porous substrates, and templates for the synthesis of micro‐ and nanostructured materials.

show abstract

Damage of swift ions in crystalline calcium fluoride. Evolution of the ion explosion spike into a thermal spike

Cited by 10 publications

References 29 publications

Dense and nanometric electronic excitations induced by swift heavy ions in an ionic CaF2crystal: Evidence for two thresholds of damage creation

Dense and nanometric electronic excitations induced by swift heavy ions in an ionic CaF2crystal: Evidence for two thresholds of damage creation

The discovery of solid-state nuclear tracks—A personal memoir from 1956–1959

Track‐Etching

Contact Info

Product

Resources

About