Channeling of 1-MeV<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">He</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>Ions in NaCl: Damage and Temperature Effects

Hollis, M.J.

doi:10.1103/physrevb.8.931

Cited by 39 publications

(4 citation statements)

References 14 publications

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“…A plot of log D" the dose at which the first drop occurred, versus inverse temperature yielded a straight line with an enthalpy of I:!.H = o. I I ±O.03 e V, for both high and low flux, although the drops occurred at higher dose values in the high-flux case. Similar effects have been reported for the alkali halides (Hollis, 1973), in BaTi0 3 (Gemmell and Mikkelson, 1972 ), and in Ge (Holmen and H6gberg, 1972 ), but to our knowledge this is the first time that a thermallyactivated process has been shown to take place. In agreement with HOllis ( 1973), we believe that these effects are due to beam-induced re-arrangement of displaced defects in the lattice.…”

Section: Methodssupporting

confidence: 86%

Radiation Damage in Ice at Low Temperatures Studied by Proton Channelling

Golecki¹,

Jaccard²

1978

J. Glaciol.

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100 keV protons with fluxes between 3 × 1015 and 3 × 1016 m-2 s-1 and in doses up to 4 × 1020 m-2 have been used in ice between - 191°C and -87°C to create damage and to analyse it. The Rutherford backscattering minimum yield along the c-axis (about 0.05 in good monocrystals) increases up to unity with the dose, according to a function which can be scaled by a critical dose depending mainly on temperature (Arrhenius law with activation enthalpy of 0.17 ± 0.04 eV above -185°C). Higher flux produces more damage above -180°C, but less below. A beam in a random direction is more efficient below - 180°C, but less at higher temperature than an aligned beam. Beam-induced reordering is observed at definite temperatures and doses. The damage is shown to be due to energy loss by electronic excitations, which decay and produce disordered molecule clusters, mainly by incoherent aggregation of vacancies and interstitials.

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Section: Methodssupporting

confidence: 86%

Radiation Damage in Ice at Low Temperatures Studied by Proton Channelling

Golecki¹,

Jaccard²

1978

J. Glaciol.

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“…for X ;;;:; 0.5) , were fluctuations in the minimum yield which were larger than expected from the statistics alone, and a series of sudden drops in X occurring a t reproducible dose values, as seen in the -170°C curve (low Aux) in Figure 2 (Hollis, 1973), in BaTi0 3 (Gemmell and Mikkelson, 1972 ), and in Ge (Holmen and H6gberg, 1972 ), but to our knowledge this is the first time that a thermallyactivated process has been shown to take place. In agreement with HOllis ( 1973), we believe that these effects are due to beam-induced re-arrangement of displaced defects in the lattice.…”

Section: Methodsmentioning

confidence: 84%

Radiation Damage in Ice at Low Temperatures Studied by Proton Channelling

Golecki

Jaccard

1978

J. Glaciol.

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ABSTRACT. 100 keV protons with flux es between 3 X 10 15 and 3 X 10 16 m -2 S-I and in doses up to 4 X 10 20 m -2 have been used in ice between -19 1°C a nd -B7°C to create damage and to analyse it. T h e Rutherford backsca ttering minimum yield a long the c-axis (about 0.05 in good monocrystals) increases up to uni ty with the dose, according to a function w h ich ca n be scaled by a critical dose d epending mainly on temperature (Arrhenius law with activation enthalpy ofo.17 ± 0.04eV a bove -IB5°C ) . Higher flu x prod u ces more damage above -IBo°C, but less below. A beam in a random d irection is more effici ent below -IBo°C, but less at higher temperature than a n a ligned bea m. Beam-induced reord ering is observed at d efinite temperat ures and doses. T h e damage is sh own to be due to energy loss by electron ic excitations, whi ch d ecay and produce disordered molecule clusters, m a inly by incoherent aggregation of vacancies and interstitia ls. 100 kcV Protonc n mit Fli.issen zwisehe n 3 X 10 15 un d 3 X 10 16 m -2 S-I und D ose n bis 4 X 10 20 m -2 wurden in E is zw ischen -191°C und -B7°C be nutz t, um St ra hlungssehiiden zu er zeugen und zu a nal ys ie re n. Das minima le Ruthe rfordsehe Ru ckstre uungsvermogen entla n g del' c-Achse (e twa 0,05 in gute n E inkrista ll en ) nimmt m it der Dose zu (bis 1,0 ) , gemiiss einer Funktion, d ie a ls Pa rameter e in e kritische Dose enthiilt , welche ha uptsiiehli ch von der Temperatur abhangt (A rrhen ius Gesctz mit 0 , 17 ± 0,04 eV Aktivierungse ntha lpi e oberhalb -IB5°C). Ein hbherer Fluss erzeugt mehr Schaden o b crhalb -IBo°C , abcr weniger un terha lb dieser Temperatur. E in Strahl mit Zufa llsri ch tung ist unter -IBo°C w irksamer a ls e in g erichteter Strahl, aber we niger bei hoheren Temperaturen. E ine vom Stra hl induzie rte Unordnung wird bei wohl bes timmten Dosen und Temperaturen beobachtct. Die Schiiden ruhren von dem durch e le ktronische Anregungen verursachtcn En ergie-Ve rlust her. Sie besteh e n aus ungeordnete n Bezirken, w elch e hauptsiichlich durch Agregat ion von Lee rs tell e n unci Zwisch engittermoleku len e ntsteh en. I. I NTRODUCTIONFor several d ecades considerable interest has b een devoted to the radiation d a mage produced by energe tic particles in solids, not only from the point of view of technological a pplications (e.g. nuclear power) but also in ord er to assess the effect of nuclear technology or of outer-space conditions o n a nimate and inanimate matter. A lthough the d a mage mechanisms are complex, sign ificant a nalogies can be found in quite different materials.W e have been prompted to stud y the damaging which lOO keY protons cause in ice in the course of an investigation into the ch annelling of the surface stru cture of ice monocrystals (Huber andothers, 1972, 1973;Huber, unpublished). For details of the method the reader is referred to a comprehensive review of Cem mell ( 1974), Briefly, one measures the backscattering yield X of a well-collimated proton b eam incident on the crystal. The yield is norma...

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“…2. Near the surface the number of atoms displaced into channels is approximately related to the minimum yield by [5] D =n ( χ min -χ 0 min ) / (1-χ 0 min ),…”

Section: Rutherford Backscattering Studymentioning

confidence: 99%

Annealing Behavior of Defects in Multiple-Energy Nitrogen Implanted ZnO Bulk Single Crystal

Kuriyama

Matsumoto

Ooi

et al. 2008

MSF

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Multiple-energy nitrogen ions (energies:1 to 100 keV and a net concentration:2.24 x 1020 cm-3) are implanted into ZnO bulk single crystals grown by the hydrothermal method. Rutherford backscattering-channeling studies show the presence of displaced Zn atoms (Zni) of about 4 % in as-implanted samples. An A-emission band related to the interstitial oxygen (Oi) is observed at 580 nm in 600 oC-annealed samples, and a new emission appears at 515 nm in 800 oC-annealed samples. It is proposed that the new emission band consists of the superposition of the green band (~525 nm) observed in unimplanted ZnO and the residual A-emission band. In 800 oC-annealed samples, a band to acceptor transition at 3.26 eV is also observed in addition to a donor to acceptor pair transition, suggesting that nitrogen acceptor is located at about 180 meV above the valence band. A thermally stimulated current peak, P1 (165 meV), which has been attributed to a native point defect, observed in unimplanted samples almost disappears in nitrogen-implanted samples annealed at 800 oC.

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Channeling of 1-MeVHe+Ions in NaCl: Damage and Temperature Effects

Cited by 39 publications

References 14 publications

Radiation Damage in Ice at Low Temperatures Studied by Proton Channelling

Radiation Damage in Ice at Low Temperatures Studied by Proton Channelling

Radiation Damage in Ice at Low Temperatures Studied by Proton Channelling

Annealing Behavior of Defects in Multiple-Energy Nitrogen Implanted ZnO Bulk Single Crystal

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