Total cross sections for some (α, n) and (α, p) reactions in medium-weight nuclei

Vlieks, A.E.; Morgan, J.F.; Blatt, S.L.

doi:10.1016/0375-9474(74)90551-x

Cited by 44 publications

(40 citation statements)

References 6 publications

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“…11). The same has been proved [13] to be true also for an enlarged systematics [78,79,80,81,82,85,86] discussed recently [23], and several data sets [83,87] lastly taken into account. The related incident-energy range can hardly explain the difference with respect to the same comparison just above A=60 (Fig.…”

Section: A≤54 Target Nucleisupporting

confidence: 60%

“…Table 1 The experimental data of α-particle elastic scattering analysed in this work. where: [73] Figure captions Table 1) angular distributions of the elastic scattering of α-particles at 25 MeV on 51 V, 53 Cr, 56,58 Fe, 59 Co, 63 Cu, 70,74,76 Ge, 76,78,80 Se, 94 Mo, 107 Ag and 112,124 Sn, divided by the Rutherford cross section, with OMP calculations by using either the present local parameter sets of Table 2 (solid curves), the regional parameter set in Table 3 (dash-dotted curves), or the global OMP parameter set of Kumar et al [23] (dotted curves). 9.…”

Section: Discussionmentioning

confidence: 99%

“…The data for the target nuclei 58,62,64 Ni [80,89,90,91] have been important for the aims of the present work since they illustrate the cross-sections trend for nearby isotopes of the same element and the (α, γ) as well as (α, n) and (α, p) reactions, which represent the total α-reaction cross section in the former and latter halves of the energy range concerned, respectively (Fig. 12).…”

Section: A ∼63 Target Nucleimentioning

confidence: 99%

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Complementary optical-potential analysis of -particle elastic scattering and induced reactions at low energies

Avrigeanu

Obreja

Román

et al. 2009

Atomic Data and Nuclear Data Tables

175

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A previously derived semi-microscopic analysis based on the Double Folding Model, for α-particle elastic scattering on A ∼100 nuclei at energies below 32 MeV, is extended to medium mass A ∼50-120 nuclei and energies from ∼13 to 50 MeV. The energy-dependent phenomenological imaginary part for this semi-microscopic optical model potential was obtained including the dispersive correction to the microscopic real potential, and used within a concurrent phenomenological analysis of the same data basis. A regional parameter set for low-energy α-particles entirely based on elastic-scattering data analysis was also obtained for nuclei within the above-mentioned mass and energy ranges. Then, an ultimate assessment of (α, γ), (α, n) and (α, p) reaction cross sections concerned target nuclei from 45 Sc to 118 Sn and incident energies below ∼12 MeV. The former diffuseness of the real part of optical potential as well as the surface imaginary-potential depth have been found responsible for the actual difficulties in the description of these data, and modified in order to obtain an optical potential which describe equally well both the low energy elastic-scattering and induced-reaction data of α-particles.

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Section: A≤54 Target Nucleisupporting

confidence: 60%

Section: Discussionmentioning

confidence: 99%

Section: A ∼63 Target Nucleimentioning

confidence: 99%

See 1 more Smart Citation

Complementary optical-potential analysis of -particle elastic scattering and induced reactions at low energies

Avrigeanu

Obreja

Román

et al. 2009

Atomic Data and Nuclear Data Tables

175

View full text Add to dashboard Cite

show abstract

“…Earlier data by Vlieks et al [55] are slightly higher especially at energies above 9 MeV. Recent stackedfoil data by Peng et al [11] and Chowdhury et al [12] are in good agreement with the other data whereas earlier stacked-foil data [59,60,61,62,63,64] deviate significantly at the lowest energies.…”

Section: Vmentioning

confidence: 56%

“…Only at the lowest energies below about 5 MeV the (α,p) cross section becomes comparable to the (α,n) cross section whereas at higher energies the (α,p) reaction contributes by less than 20 % [57]. The data points at the lowest energies for the (α,p) reaction in [58] [55,57,58,11,12] are shown. The agreement between the experimental (α,n) data and the calculated total reaction cross section σ reac and reduced cross section σ red is excellent up to E red ≈ 1.5 MeV.…”

Section: Vmentioning

confidence: 99%

Cross sections of α-induced reactions for targets with masses A ≈ 20–50 at low energies

Mohr

2015

Eur. Phys. J. A

100

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Abstract. A simple reduction scheme using so-called reduced energies E red and reduced cross sections σ red allows the comparison of heavy-ion induced reaction cross sections for a broad range of masses of projectile and target and over a wide energy range. A global behavior has been found for strongly bound projectiles whereas much larger reduced cross sections have been observed for weakly bound and halo projectiles. It has been shown that this simple reduction scheme works also well for α-particle induced reactions on heavy target nuclei, but very recently significant deviations have been seen for α+ 33 S and α+ 23 Na. Motivated by these unexpected discrepancies, the present study analyses α-induced reaction cross sections for targets with masses A ≈ 20 − 50. The study shows that the experimental data for α-induced reactions on nuclei with A ≈ 20 − 50 deviate slightly from the global behavior of reduced cross sections. However, in general the deviations evolve smoothly towards lower masses. The only significant outliers are the recent data for 33 S and 23 Na which are far above the general systematics, and some very old data may indicate that 36 Ar and 40 Ar are below the general trend. As expected, also the doubly-magic 40 Ca nucleus lies slightly below the results for its neighboring nuclei. Overall, the experimental data are nicely reproduced by a statistical model calculation utilizing the simple α-nucleus potential by McFadden and Satchler. Simultaneously with the deviation of reduced cross sections σ red from the general behavior, the outliers 23 Na, 33 S, 36 Ar, and 40 Ar also show significant disagreement between experiment and statistical model calculation.PACS. 25.55.-e 3H-, 3He-, and 4He-induced reactions -24.10.Pa Thermal and statistical models

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Measurement and Hybrid Model Analysis of Integral Excitation Functions for α-Induced Reactions on Vanadium and Manganese

Michel

Brinkmann

Stück

1983

Nuclear Data for Science and Technology

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Total cross sections for some (α, n) and (α, p) reactions in medium-weight nuclei

Cited by 44 publications

References 6 publications

Complementary optical-potential analysis of -particle elastic scattering and induced reactions at low energies

Complementary optical-potential analysis of -particle elastic scattering and induced reactions at low energies

Cross sections of α-induced reactions for targets with masses A ≈ 20–50 at low energies

Measurement and Hybrid Model Analysis of Integral Excitation Functions for α-Induced Reactions on Vanadium and Manganese

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