Niveaux du 10B excités dans la diffusion élastique 9Be + p à 2 ≤ Ep ≤ 5 MeV

Allab, M.; Boucenna, A.; Haddad, Mohammad Ali

doi:10.1051/jphys:01983004405057900

Cited by 13 publications

(8 citation statements)

References 24 publications

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“…The differential cross-section in the laboratory system is shown in Fig. 5 together with the data from Liu [10], Allab [11], Yasue [12], Mashkarov [13], and Tsan [14]. The determined cross-section values are tabulated in Table 2.…”

Section: The 9 Be(pp 0 ) 9 Be Backscattering Cross-sectionmentioning

confidence: 99%

“…Unfortunately there are only scarce data available for the 9 Be(p,p 0 ) 9 Be backscattering cross-section, which are at least twenty years old [10][11][12][13][14]. Three data sets are close to a scattering angle of 160° [11,13,14], but each covers only a limited energy range. The data by Liu [10] cover the whole energy range from 0.15 to 3 MeV at a scattering angle of 170°.…”

Section: Introductionmentioning

confidence: 99%

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The 9Be(p,p0)9Be, 9Be(p,d0)8Be, and 9Be(p,α0)6Li cross-sections for analytical purposes

Krat

Mayer

Poroşnicu

2015

Nuclear Instruments and Methods in Physics Research Section B:

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a b s t r a c tThe cross-sections for the 9 Be(p,d 0 ) 8 Be nuclear reaction and for 9 Be(p,p 0 ) 9 Be backscattering were measured at a laboratory scattering angle of 165°in the energy range from 400 to 4150 keV, the cross-section for the 9 Be(p,a 0 ) 6 Li nuclear reaction was determined in the energy range from 400 to 1300 keV. The cross-sections were determined using thin films. The absolute accuracies are about 4.4-8.6% for the backscattering, 4.6-24% for the 9 Be(p,d 0 ) 8 Be nuclear reaction, and 4.5-5% for the 9 Be(p,a 0 ) 6 Li nuclear reaction cross-section. The derived cross-section data were benchmarked in the energy range 1100-4100 keV by comparison to measured spectra from bulk beryllium. The cross-section data are presented in graphical and tabular forms.Ó 2015 Elsevier B.V. All rights reserved. 9 Be þ p ! d 0 þ 8 Be ðIÞ 9 Be þ p ! a 0 þ 6 Li ðIIÞ 9 Be þ p ! a 1 þ 6 Li ðIIIÞ Reaction (I) has a relatively large cross-section in the energy range 1-2.5 MeV and has to be taken into account when analyzing thick Be layers. The lifetime of the produced 8 Be is very short and it further disintegrates into two a-particles. Cross-section data for http://dx.

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Section: The 9 Be(pp 0 ) 9 Be Backscattering Cross-sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The 9Be(p,p0)9Be, 9Be(p,d0)8Be, and 9Be(p,α0)6Li cross-sections for analytical purposes

Krat

Mayer

Poroşnicu

2015

Nuclear Instruments and Methods in Physics Research Section B:

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“…Therefore, the absolute normalization of the cross section was performed by evaluating the product of the effective target thickness and integral of accumulated 9 Be beam ions from the simultaneously measured 1 H( 9 Be,p) 9 Be elastic scattering cross section known from previous experiments [15,16]. The uncertainty of this procedure was evaluated using 3 pairs of identical beam energy data points that were measured in six separate runs at 22.9 MeV, 37.…”

Section: Methodsmentioning

confidence: 99%

Molecular structures inT=1states of10B

et al. 2011

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“…The spectrum evaluation has been performed as an iterative manual procedure treating a set of spectra in turn until selfconsistency has been achieved between the He + -RBS and p-EBS spectra recorded on the same sample at different tilt angles. In the evaluation, the Rutherford cross-section data for He + backscattering were considered, while the non-Rutherford elastic proton backscattering crosssection data for Be [20,21,29], O [30,31], Mg [32], and Al [33][34][35] were adopted from the literature. Note for Be data from Leavitt [21] and data from Mashkarov [29] agree well within A c c e p t e d M a n u s c r i p t the Leavitt's experimental uncertainty of 5% in the energy range of interest (2500-2530 keV).…”

Section: Methodsmentioning

confidence: 99%

“…In the case of Be containing ZnO and MgZnO, a strong resonance with an enhancement factor of 60(3) appears in the elastic backscattering cross-section of the 9 Be(p,p) 9 Be reaction for proton energies around 2.5 MeV [20,21]. Although the concept of monitoring Be with this reaction was proposed and applied for BeZnO [22], actually there has been no experimental demonstration with a detailed analysis of the measured backscattering spectra.…”

Section: Introductionmentioning

confidence: 99%

Nondestructive atomic compositional analysis of BeMgZnO quaternary alloys using ion beam analytical techniques

Zolnai

Toporkov

Volk

et al. 2015

Applied Surface Science

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HighlightsBeMgZnO thin layers were grown with plasma assisted molecular beam epitaxy (MBE)The Be contents were accurately measured with RBS and proton elastic backscattering The Tauc bandgap was measured from optical transmittance experiments The bandgap has been varied between 3.26 eV and 4.62 eV via the Be and Mg content Experimental and density functional theory calculated bandgaps were in good agreement AbstractThe atomic composition with less than 1-2 atom % uncertainty was measured in ternary BeZnO and quaternary BeMgZnO alloys using a combination of nondestructive Rutherford backscattering spectrometry with 1 MeV He + analyzing ion beam and nonRutherford elastic backscattering experiments with 2.53 MeV energy protons. An enhancement factor of 60 in the cross-section of Be for protons has been achieved to monitor Be atomic concentrations. Usually the quantitative analysis of BeZnO and BeMgZnO systems is challenging due to difficulties with appropriate experimental tools for the detection of the light Be element with satisfactory accuracy. As it is shown, our applied ion beam technique, Page 2 of 22A c c e p t e d M a n u s c r i p t supported with the detailed simulation of ion stopping, backscattering, and detection processes allows of quantitative depth profiling and compositional analysis of wurtzite BeZnO/ZnO/sapphire and BeMgZnO/ZnO/sapphire layer structures with low uncertainty for both Be and Mg. In addition, the excitonic bandgaps of the layers were deduced from optical transmittance measurements. To augment the measured compositions and bandgaps of BeO and MgO co-alloyed ZnO layers, hybrid density functional bandgap calculations were performed with varying the Be and Mg contents. The theoretical vs. experimental bandgaps show linear correlation in the entire bandgap range studied from 3.26 eV to 4.62 eV. The analytical method employed should help facilitate bandgap engineering for potential applications, such as solar blind UV photodetectors and heterostructures for UV emitters and intersubband devices.

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Niveaux du 10B excités dans la diffusion élastique 9Be + p à 2 ≤ Ep ≤ 5 MeV

Cited by 13 publications

References 24 publications

The 9Be(p,p0)9Be, 9Be(p,d0)8Be, and 9Be(p,α0)6Li cross-sections for analytical purposes

The 9Be(p,p0)9Be, 9Be(p,d0)8Be, and 9Be(p,α0)6Li cross-sections for analytical purposes

Molecular structures inT=1states of10B

Nondestructive atomic compositional analysis of BeMgZnO quaternary alloys using ion beam analytical techniques

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