The annealing of irradiation damage in graphite

Kelly, Brian; Martin, W.H.; Price, A.M.; Dolby, P.; Smith, Katherine L.

doi:10.1016/0022-3115(66)90008-0

Cited by 43 publications

(3 citation statements)

References 12 publications

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“…Lattice atoms are assumed to be knocked from their original positions to others which are not necessarily regular lattice sites. This type of damage restricted to the surface is known (23) and the required minimum energies can be estimated. For zinc silicate, for instance, they are about 2,0-25 eV.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

Phosphor Deterioration in Fluorescent Lamps

Lehmann

1983

J. Electrochem. Soc.

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The well‐known deterioration of phosphors in fluorescent lamps consists essentially of two parts, a short‐time degradation over roughly one hour possibly due to color center formation, and a long‐time effect extending over thousands of hours explained by a slow build‐up of a disordered and non‐luminescent layer on the phosphor particles. Such layer has been observed on deteriorated zinc silicate, it is very thin. Its optical absorption is the main reason of decreasing lamp brightness. Mercury buried in, but not absorbed on, the dead layer may contribute to the optical absorption. The brightness‐time function of the long‐time degradation is B/B0=expfalse(−√normalt/τfalse) with τ as a time constant. This model agrees well with observations. Conclusions are drawn concerning the stability of phosphors in lamps and its dependence on some parameters.

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Section: Theoretical Considerationsmentioning

confidence: 99%

Phosphor Deterioration in Fluorescent Lamps

Lehmann

1983

J. Electrochem. Soc.

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“…The atomic collision in the first step is responsible for the intermixing between the Co and Cu metal layers, as the Co and Cu atoms are excited by the impinging ions into motion and migrate, crossing the interfaces. To describe atomic displacements and defect creation induced by irradiation, a parameter 'dpa' (standing for the number of displacement events per atom) is defined [13], which can be calculated from…”

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confidence: 99%

Formation of a dodecagonal phase in an equilibrium immiscible Co-Cu system induced by ion irradiation and associated evolution

Liu²

2001

J. Phys.: Condens. Matter

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Abnormal structural changes were observed in the equilibrium immiscible Co50Cu50 multilayers induced by 200 keV xenon-ion irradiation at 77 K. First, a dodecagonal quasicrystal phase was formed at an irradiation dose of 1×1015 Xe+ cm-2. Secondly, series of selected diffraction patterns taken later showed that the dodecagonal phase formed evolved to feature a high degree of ordering with increasing ion dose. Moreover, molecular dynamics simulations verified the possibility of formation of a metastable phase in the Co-Cu system. A mechanism possibly responsible for the observed structural changes upon ion irradiation is also discussed.

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“…i n Petroleum Asphalt (wt-%) 37 26-24B 0 20 3 7 26-2 6-1 l i g h t i n g . The g r a p h i t e c r y s t a l s appeared t o grow from a m e t a l l i c n u c l e u s .…”

Section: T H I Smentioning

confidence: 99%