The Radioactive Ion Beams in Brazil (RIBRAS) facility

Lépine‐Szily, A.; Lichtenthäler, R.; Guimarães, V.

doi:10.1140/epja/i2014-14128-4

Cited by 47 publications

(59 citation statements)

References 116 publications

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“…This trend becomes nicely visible when so-called reduced cross sections σ red are plotted versus the reduced energy E red as suggested by [19]. However, very recently huge discrepancies have been found for the light nuclei 23 Na and 33 S where much larger values for σ red have been observed; a detailed dis-cussion of α-induced reactions of 33 S was provided recently in [20].…”

Section: Introductionmentioning

confidence: 69%

“…The strong deviation between expected reduced cross sections σ red and experimental results for 40 Ar, 36 Ar, 33 S, and 23 Na is correlated with a poor agreement between the experimental data and the StM calculations. From the otherwise smooth behavior of σ red values for nuclei with A ≈ 20 − 50 it is obvious that it is not possible to find an α-nucleus potential with smoothly varying parameters which is able to reproduce the general trend of σ red and the lower outliers 40 Ar and 36 Ar and the upper outliers 33 S and 23 Na simultaneously.…”

Section: Discussionmentioning

confidence: 88%

“…4.30). As for both 33 S and 23 Na only one data set is available in the relevant energy range, new experimental data would be very helpful to confirm the unexpected behavior of these two nuclei.…”

Section: Discussionmentioning

confidence: 99%

“…6,7 Li) or halo projectiles (e.g. 6 He), see [32,33]. Results for α-induced reactions on heavy target nuclei fit into the systematics of heavy-ion induced reactions [17,18].…”

Section: Introductionmentioning

confidence: 95%

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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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Section: Introductionmentioning

confidence: 69%

Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

“…6,7 Li) or halo projectiles (e.g. 6 He), see [32,33]. Results for α-induced reactions on heavy target nuclei fit into the systematics of heavy-ion induced reactions [17,18].…”

Section: Introductionmentioning

confidence: 95%

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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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“…The scattering of nuclei away from the nuclear stability line has been one of the principal fields of research in lowenergy nuclear physics over the last decades [1][2][3][4][5][6][7][8]. As one moves away from the valley of stability we find the socalled exotic nuclei which often have several interesting properties.…”

Section: Introductionmentioning

confidence: 99%

B8+Al27 scattering at low energies

et al. 2017

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We present 8 B+ 27 Al elastic scattering angular distributions for the proton-halo nucleus 8 B at two energies above the Coulomb barrier, namely E lab = 15.3 MeV and 21.7 MeV. The experiments have been performed in the Radioactive Ion Beams in Brasil facility (RIBRAS) in São Paulo, and in the TwinSol facility at the University of Notre Dame, USA. The angular distributions were measured in the angular range of 15-80 degrees. Optical model and Continuum Discretized Coupled Channels calculations have been performed and the total reaction cross sections have been derived. A comparison of the 8 B+ 27 Al total reaction cross sections with similar systems including exotic, weakly and tightly bound projectiles impinging on the same target is presented.

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