Measurements of the elastic scattering cross sections for proton on T, 4He

Cai, Tommaso; Li, J.Q.; Wang, X.F.; Shi, Liqun

doi:10.1016/j.nimb.2010.07.016

Cited by 3 publications

(8 citation statements)

References 13 publications

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“…However, because of the cross-section dependence on angle, the available data are valid only in the case of a scattering geometry very close to the geometry used in the cross-section measurements. Intensive research work can be found in the literature; ,,− however, some discrepancies in reported cross-sections are related to the target nature and associated restrictions. , In this work, we present a comparison between our data and those reported in the literature by other authors for similar conditions and targets of different nature, ,,− evidencing the use of our coatings as solid He targets.…”

Section: Introductionsupporting

confidence: 52%

Characterization and Validation of a-Si Magnetron-Sputtered Thin Films as Solid He Targets with High Stability for Nuclear Reactions

et al. 2016

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In this work, we present our magnetron sputtering based methodology to produce amorphous silicon coatings with closed porosity, as a strategy to fabricate solid helium targets, in the form of supported or self-supported thin films, for nuclear reactions. We show how by changing the He working pressure it is possible to obtain highly porous homogeneous structures incorporating different He amounts. These porous coatings (a-Si:He) are very reproducible from run to run, and the high He amount incorporated makes them excellent candidates for solid He targets. The possibility of producing self-supported films is illustrated here, and its potential use in inverse kinematics experiments with radioactive beams is shown through the dispersion in forward geometry of a stable 6 Li beam. Also the elastic scattering cross-sections for proton from helium were determined using an a-Si:He coating. The results agree well with the ones reported in the literature. These two examples validate our coatings as good candidates to be used as solid He targets in nuclear reactions. The stability of He inside the coatings, fundamental for its use as solid He targets, was investigated, both over time and after irradiation. The coatings proved to be very stable, and the amount of He inside the pores remains unaltered at least 2 years after deposition and after high irradiation fluence (5 × 10 17 particles/cm 2 ; with a dose rate of 5 × 10 12 particles/(cm 2 s)).

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Section: Introductionsupporting

confidence: 52%

Characterization and Validation of a-Si Magnetron-Sputtered Thin Films as Solid He Targets with High Stability for Nuclear Reactions

et al. 2016

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“…In particular, the ratios of these non-RBS to corresponding RBS cross sections at the scattering angle of 0 o or below the energies determined by Bozoian's formulae [27] are set to be one. The cross sections data at 165 o for tritium from ENDF/B-VII.1 database are also compared with the available experimental data [7], and they are in good agreement [16].…”

Section: Corteo Codementioning

confidence: 99%

“…Among the analysis techniques developed for measuring tritium and helium in materials, ion beam analysis (IBA) techniques, including nuclear reaction analysis (NRA) [3,4], elastic recoil detection analysis (ERDA) [5,6] and enhanced proton backscattering (EPBS) [7,8] have been developed for many years and can provide information of tritium and helium concentration and depth distribution in materials in an almost nondestructive manner. In recent years, based on the work of Matsuyama, et al [9], we tried to develop the β-decay induced X-ray spectroscopy (BIXS) into a routine, accurate and in situ tritium analysis method for tritium-containing films by incorporating Monte Carlo simulation and Tikhonov regularization for dealing with the ill-posed inverse problems involved in the BIXS method [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…We examined several possible reasons for this situation [16], for example, the energy deposits in Au(Si) surface barrier detector used to detect backscattered protons due to tritium β-decay electrons and neutrons produced in the reaction T(p,n) 3 He when the incident energy of proton was larger than the threshold energy, 1.02 MeV, and possible inaccuracy of non-Rutherford backscattering (non-RBS) cross sections of T(p,p)T. We observed that these possible reasons can not explain the disagreement between the experimental EPBS spectra and the fitting spectra given by SIMNRA code at the low-energy part for tritium analysis. Moreover, we noticed that SIMNRA code utilizes Rutherford backscattering (RBS) cross sections, instead of non-RBS cross sections which are usually one to three orders of magnitude larger than RBS cross sections ( in particular for tritium, the ratio of non-RBS cross sections to RBS cross sections can be ~1000 at ~3.5 MeV [7]), to calculate the dual scattering contributions for non-RBS light elements (e.g., T, 4 He, 12 C, 14 N, 16 O, nat Si and so on). For small-angle scattering, non-RBS cross sections tend to be equal to RBS cross sections, therefore whether non-RBS cross sections or RBS cross sections are used are not important in this case.…”

Section: Introductionmentioning

confidence: 99%

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Tritium and helium analyses in thin films by enhanced proton backscattering

Fu¹,

An²,

Zhu³

et al. 2014

Chinese Phys. C

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“…The beam was confined by a set of collimating slits to 1 mm in diameter when bombarding the target. The beam current was measured by a Faraday cup located behind the target [9,10], and the currents used in the experiment were about 30 nA. The beam current was confined not too high, thus the dead time of the ADC was in a very low range and the pulse pileup could be minimized.…”

Section: Experimental Systemmentioning

confidence: 99%