Measurement and parametrization of proton elastic scattering cross sections for nitrogen

Radović, Iva Bogdanović; Siketić, Zdravko; Jakšić, Milko; Gurbich, A.F.

doi:10.1063/1.2988276

Cited by 9 publications

(3 citation statements)

References 16 publications

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“…The 8 arrows in the top panel indicate the positions of the known low-lying resonances with significant total widths, corresponding well to the peaks appearing in the experimental data. For known excited levels [33] in the corresponding energy region, most resonance energies and total widths have been well determined via proton elastic and inelastic scattering on 14 N, and some spins, parities and orbital angular momenta were assigned by R-matrix analysis [34,35], but no α partial widths were known. Here we do not demonstrate R-matrix analysis on these data, because we have only limited statistics for each resonances, the resonance widths are comparable to the energy resolution, and the most resonances overlap each other, which would unlikely lead any new information or constraints beyond what was determined in the previous works.…”

Section: Astrophysical S-factorsmentioning

confidence: 99%

First direct measurement of the $^{11}$C($α$, p)$^{14}$N stellar reaction by an extended thick-target method

Hayakawa,

Kubono,

Kahl

et al. 2016

Preprint

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The 11 C(α, p) 14 N reaction is an important α-induced reaction competing with β-limited hydrogenburning processes in high-temperature explosive stars. We directly measured its reaction cross sections both for the ground-state transition (α, p0) and the excited-state transitions (α, p1) and (α, p2) at relevant stellar energies 1.3-4.5 MeV by an extended thick-target method featuring time of flight for the first time. We revised the reaction rate by numerical integration including the (α, p1) and (α, p2) contributions and also low-lying resonances of (α, p0) using both the present and the previous experimental data which were totally neglected in the previous compilation works. The present total reaction rate lies between the previous (α, p0) rate and the total rate of the Hauser-Feshbach statistical model calculation, which is consistent with the relevant explosive hydrogenburning scenarios such as the νp-process.

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Section: Astrophysical S-factorsmentioning

confidence: 99%

First direct measurement of the $^{11}$C($α$, p)$^{14}$N stellar reaction by an extended thick-target method

Hayakawa,

Kubono,

Kahl

et al. 2016

Preprint

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“…Several important parameters concerning NRA experiments for light elements like C, O and N have been reported in the literature [4][5][6][7]. Depth profiling of light elements employing (p,ac), ( 3 He,p) and (d,p) reactions have been reported [8].…”

Section: Introductionmentioning

confidence: 99%

The role of micro-NRA and micro-PIXE in carbon mapping of organic tissues

Niekraszewicz

Souza

Stori

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

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a b s t r a c tThis study reports the work developed in the Ion Implantation Laboratory (Porto Alegre, RS, Brazil) in order to implement the micro-NRA technique for the study of light elements in organic tissues. In particular, the work was focused on nuclear reactions employing protons and alphas with carbon. The (p,p) resonances at 0.475 and 1.734 were investigated. The (a,a) resonance at 4.265 MeV was studied as well. The results indicate that the yields for the 0.475 and 1.734 MeV resonances are similar. Elemental maps of different structures obtained with the micro-NRA technique using the 1.734 MeV resonance were compared with those obtained with micro-PIXE employing a SDD detector equipped with an ultra-thin window. The results show that the use of micro-NRA for carbon at 1.734 MeV resonance provides good results in some cases at the expense of longer beam times. On the other hand, micro-PIXE provides enhanced yields but is limited to surface analysis since soft X-rays are greatly attenuated by matter.

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“…In the past, benchmarking results have usually been reported, related to the validity of specific experimentally determined differential cross-section datasets [e.g. [3][4][5]. However, such measurements have never been performed in a systematic and consistent way, taking into account all the fine steps and details of the benchmarking process.…”

Section: Introductionmentioning

confidence: 99%

The benchmarking procedure: Implementation in the case of proton backscattering

Paneta

Colaux

Gurbich

et al. 2019

hnps

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The benchmarking procedure in IBA regards the validation of charged-particle differential cross- section data via the acquisition of EBS spectra from uniform thick target of known composition followed by their detailed simulation. In the present work such benchmarking measurements have been performed for the elastic scattering of protons on 23Na, 31P and natS in the energy range of 1– 3.5 MeV in steps of 250 keV at three backward angles, at 120.6°, 148.8° and 173.5° in order to validate the corresponding existing evaluated cross-section datasets from SigmaCalc and to facilitate their extension at higher energies. The measurements were performed using the 2 MV Tandetron Accelerator of the Ion Beam Center of the University of Surrey. The EBS spectra acquired were compared with simulated ones using the DataFurnace code, along with an a posteriori treatment of the surface roughness. All the experimental parameters were thoroughly investigated and the results obtained and the discrepancies found are discussed and analyzed. Moreover, the benchmarking procedure in complicated cases, such as the natB(p,p) studied at NCSR “Demokritos”, where background contributions exist, is also discussed.

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Measurement and parametrization of proton elastic scattering cross sections for nitrogen

Cited by 9 publications

References 16 publications

First direct measurement of the $^{11}$C($α$, p)$^{14}$N stellar reaction by an extended thick-target method

First direct measurement of the $^{11}$C($α$, p)$^{14}$N stellar reaction by an extended thick-target method

The role of micro-NRA and micro-PIXE in carbon mapping of organic tissues

The benchmarking procedure: Implementation in the case of proton backscattering

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