Direct Interactions and the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Li</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>6</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow><mml:mo>+</mml:mo><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Li</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>6</mml:mn></mml:mrow><mml:mrow /><mml:

Gadeken, L.L.; Norbeck, E.

doi:10.1103/physrevc.6.1172

Cited by 10 publications

(8 citation statements)

References 7 publications

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“…These results were obtained by Gadeken and Norbeck [8] at 6 and 13 MeV incident energy. Their data were well fitted by a plane wave Born approximation (PWBA) calculation.…”

Section: Introductionsupporting

confidence: 85%

Energy dependence of direct effects in the6Li +6Li → 3α reaction around the Coulomb Barrier

Латтуада

Riggi

Vinciguerra

et al. 1988

Z. Physik A - Atomic Nuclei

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“…These results were obtained by Gadeken and Norbeck [8] at 6 and 13 MeV incident energy. Their data were well fitted by a plane wave Born approximation (PWBA) calculation.…”

Section: Introductionsupporting

confidence: 85%

Energy dependence of direct effects in the6Li +6Li → 3α reaction around the Coulomb Barrier

Латтуада

Riggi

Vinciguerra

et al. 1988

Z. Physik A - Atomic Nuclei

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“…In these plots, any event correlation appearing as a horizontal or vertical or bended line, gives evidence of the formation of an excited intermediate 8 Be, finally decaying into two α's. From this representation there is evidence of correlation corresponding to the ground state of 8 Be and mildly to the doublet at 16.6 and 16.9 MeV and to the 3.03-MeV state although affected by the limited phase space populated in the experiment. In addition, a strong contribution in the region of the 22.2-MeV state of 8 Be is apparent in the E α 1 α 2 variable.…”

Section: Selection Of the 3-α Channelmentioning

confidence: 97%

“…In previous years, the 6 Li + 6 Li → 3α reaction around the Coulomb barrier was experimentally investigated by several authors [1][2][3][4][5][6][7][8][9][10][11][12][13][14], in several cases for astrophysical studies via the Trojan Horse method [15][16][17][18][19][20][21][22]. Both sequential decay (SD) through 8 Be excited states and direct processes were seen to contribute to the reaction cross section.…”

Section: Introductionmentioning

confidence: 99%

“…Both sequential decay (SD) through 8 Be excited states and direct processes were seen to contribute to the reaction cross section. Such direct contributions have been mainly interpreted as from quasifree (QF) processes, in which an α cluster, either in the target or in the projectile, is spectator of the 6 Li+d → 2α virtual reaction.…”

Section: Introductionmentioning

confidence: 99%

“…The aim was to investigate the existence of QF processes at such low energy that from kinematics appear well separated. Two steps were employed in the analysis of experimental data: first "energy sharing" (ES) and "angular correlation" (AC) analysis was performed to check the existence of the QF mechanisms, then a new interpretation of the huge peak in the α-α angular correlation spectra based on the population of the 22.2-MeV state of 8 Be is suggested.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quasifree mechanism in theLi6+Li6→3αreaction at low energy

et al. 2015

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The 6 Li + 6 Li → 3α reaction was measured in a kinematically complete experiment at 3.1 and 2.5 MeV to investigate the presence of quasifree processes at sub-Coulomb energies. Results from the present experiment show a very clear evidence of quasifree mechanisms with an α-particle spectator either in the target or in the projectile. To check the occurrence of quasifree processes, "energy sharing" and "angular correlation" analyses have been performed in the framework of the plane wave impulse approximation, both leading to consistent results. The huge peak in the angular correlation spectra, previously ascribed to the "anomalous quasifree" process, corresponds instead to the population of the 22.2-MeV (2 + , = 800 keV) state of 8 Be.

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The electron screening puzzle and nuclear clustering

et al. 2016

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Accurate measurements of nuclear reactions of astrophysical interest within, or close to, the Gamow peak, show evidence of an unexpected effect attributed to the presence of atomic electrons in the target. The experiments need to include an effective "screening" potential to explain the enhancement of the cross sections at the lowest measurable energies. Despite various theoretical studies conducted over the past 20 years and numerous experimental measurements, a theory has not yet been found that can explain the cause of the exceedingly high values of the screening potential needed to explain the data. In this letter we show that instead of an atomic physics solution of the "electron screening puzzle", the reason for the large screening potential values is in fact due to clusterization effects in nuclear reactions, in particular for reaction involving light nuclei.Comment: 6 pages, 2 figures, accepted for publication in Physics Letters

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Direct Interactions and theLi6+Li6

Cited by 10 publications

References 7 publications

Energy dependence of direct effects in the6Li +6Li → 3α reaction around the Coulomb Barrier

Energy dependence of direct effects in the6Li +6Li → 3α reaction around the Coulomb Barrier

Quasifree mechanism in theLi6+Li6→3αreaction at low energy

The electron screening puzzle and nuclear clustering

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