Reaction channel contributions to the helion optical potential

Mackintosh, R. S.; Keeley, N.

doi:10.1103/physrevc.100.064613

Cited by 9 publications

(43 citation statements)

References 32 publications

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“…The calculations presented here for 3 H projectiles are as close * nicholas.keeley@ncbj.gov.pl † raymond.mackintosh@open.ac.uk as possible to similar calculations performed previously for 49 3 He projectiles [4]. Apart from the various points of interest 50 in the comparison of the interactions of the pair 3 H and 3 He 51 on a doubly closed-shell nucleus, we are concerned to put 52 beyond doubt the essential contributions of the coupling ef-53 fects that we study.…”

Section: Introductionsupporting

confidence: 80%

“…In Ref. [4], a considerable contribution from coupling to inelastic and pickup channels was found for the 3 He OMP for target nuclei 16 O and 40 Ca. The present paper applies the same methodology to the 3 H OMP for the same nuclei for the following reasons.…”

mentioning

confidence: 99%

“…For exam-64 ple, in the case of the contribution of neutron pickup (PU) to 65 proton scattering, the breakup of the deuteron was generally 66 not taken into account. In this respect, the contribution of the 67 coupling of 4 He channels to the 3 H OMP is favorable, and is 68 studied in this paper, along with the contribution of collective 69 excitation of the target nucleus. A substantial contribution of nucleon pickup coupling to the mass-3 OMP was found long ago [11], but that work has been superseded by major improvements to coupled reaction channel (CRC) codes: finite range coupling and nonorthogonality corrections are included in the FRESCO code [12] employed in the present paper.…”

mentioning

confidence: 99%

“…The contribution of coupled reaction channels to the OMP 61 has been studied for protons (for recent contributions see 62 [5][6][7][8][9]), deuterons [10], and helions [4] but in all these cases 63 many effects were omitted or treated incompletely. For exam-64 ple, in the case of the contribution of neutron pickup (PU) to 65 proton scattering, the breakup of the deuteron was generally 66 not taken into account.…”

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confidence: 99%

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Reaction channel contributions to the triton optical potential

Keeley

Mackintosh

2020

Phys. Rev. C

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Section: Introductionsupporting

confidence: 80%

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confidence: 99%

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Reaction channel contributions to the triton optical potential

Keeley

Mackintosh

2020

Phys. Rev. C

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“…[228] Finally,a ctivity-induced molecular transport may also shed new light on the rheological features of live cells that have been found to be critically related to some diseases and pathologies. [229,230] Importantly,t he available theories on diffusion enhancement of passive tracers in biological cells do not rely on potential swimming or selfpropulsion strategies of active molecules.I nstead, such enhancement is attributed either to the random contractions caused by myosin motors in the cellular skeleton acting as an active gel, [231] or to the hydrodynamic stirring caused by cyclic conformational changes in active proteins in the cytoplasm. [205,206,208] Such enhancements are further believed to be due to the combination of both of these effects in viscoelastic media.…”

Section: Angewandte Chemiementioning

confidence: 99%

Dynamic Coupling at Low Reynolds Number

Dey

2019

Angew Chem Int Ed

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Collective and emergent behaviors of active colloidal assemblies provide useful insights into the statistical physics of out-of-equilibrium systems. Colloidal suspensions containing microscopic active swimmers have recently been studied with much vigor to understand principles of energy transfer at low Reynolds number conditions. Using molecules of active enzymes and ångström sized organometallic catalysts it has further been demonstrated that energy can be transferred even by molecules to their surroundings, influencing substantially the overall dynamics of the systems. Monitoring the diffusion of non-reacting tracers dispersed in active solutions, it has been shown that the nature of energy transfer in systems containing different swimmers is surprisingly similar - irrespective of their differences in sizes, modes of energy transduction and propulsion strategies. These observations provide motivation not only to characterize reaction generated force fields under complex fluidic environment but also to look for possible similarity in their behavior across multiple length scales. This review discusses research results obtained so far in this direction, highlighting the common features observed regarding dynamic coupling of swimmers with their surroundings. Activity-induced force generation and its collective effects are expected to find wide importance in transport and organization of materials at smaller length scales. Underscoring the nature of reaction generated perturbations, especially under crowded cytosolic conditions, is further likely to advance our knowledge of intracellular mechanics of small molecules during various metabolic processes and chemical transformations.

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A nucleon–nucleus optical model for A ≤ 13 nuclei at 65–75 MeV projectile energy

Weppner¹

2018

J. Phys. G: Nucl. Part. Phys.

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Small nuclei (A<16) test the limits of optical potential theory, most recently there has been difficulty matching the helium isotopes' analyzing powers at 71 MeV per nucleon. We provide a phenomenological optical potential that has been fit to a variety of experimental proton-nucleus and neutron-nucleus scattering data between A=4 and A=13 with a projectile energy between 65 and 75 MeV; the motivation being the helium isotopes. The resulting potential is dependent only on projectile isospin, neutron, and proton numbers. It fits the analyzing power of 6 He satisfactorily only by including a nontraditional negative surface depth and a spin-orbit force which is significant at a distance larger than traditional models. We offer physical interpretations of our non-traditional results, suggest directions for microscopic calculations, and proffer calculations for future experiments.

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Reaction channel contributions to the helion optical potential

Abstract: Reaction channel contributions to the helion optical potential. Physical Review C, 100(6), article no. 064613. For guidance on citations see FAQs.

Cited by 9 publications

References 32 publications

Reaction channel contributions to the triton optical potential

Reaction channel contributions to the triton optical potential

Dynamic Coupling at Low Reynolds Number

A nucleon–nucleus optical model for A ≤ 13 nuclei at 65–75 MeV projectile energy

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