Low-energy elastic-scattering of alpha particles from 34S, 50Cr and 62Ni

Bredback, Å.; Brenner, M.; Källman, K.-M.; Manngård, P.; Máté, Z.; Szilágyi, Sándor; Zolnai, L.

doi:10.1016/0375-9474(94)90237-2

Cited by 26 publications

(26 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A suitable description of the (α, x) reaction data below the Coulomb barrier is no longer possible by means of the optical potential provided by the elastic-scattering data analysis above this barrier, a modified surface imaginary potential being necessary. A reliable assessment of the final ROP below the Coulomb barrier has been given by its straightforward and successful use in calculations of reaction cross sections for the target nuclei 44 Ti, 55 Mn, 56 Fe, 59 Co, 58 Ni, 65 Cu, and 70 Ge.…”

Section: Discussionmentioning

confidence: 99%

“…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%

“…A similar case but due to a distinct reason occurs for cross sections of the (α, γ) reaction on 56 Fe and 70 Ge obtained as well as for (α, n) reaction (Fig. 13) by using straightforwardly the final ROP.…”

Section: A ∼63 Target Nucleimentioning

confidence: 99%

See 2 more Smart Citations

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

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.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

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

“…2 and 3). The data point for 44 Ti at E red ≈ 2.52 MeV has been taken from the analysis of elastic 44 Ti(α,α) 44 Ti scattering in [36]; it is hardly visible because it overlaps with a data point for 34 S. The low-energy data points for 44 Ti will be explained later (Sec. 4.7).…”

Section: Introductionmentioning

confidence: 99%

“…The experimental σ red data for 34 S and 50 Cr have been derived from the experimental angular distributions of Bredbecka et al [34] by phase shift fits according to [35] (see Figs. 2 and 3).…”

Section: Introductionmentioning

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

View full text Add to dashboard Cite

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

show abstract