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Article
Open AccessCalculations of positron scattering from small molecules
Recently, convergent close-coupling calculations have been completed for positron scattering from the carbon and oxygen atomic targets. These, together with previously completed calculations for atomic hydroge...
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Article
Open AccessConvergent close-coupling calculations of positron scattering from neon and argon
Positron scattering from the noble gas atoms neon and argon is calculated using the single-center convergent close-coupling (CCC) method. Unlike previous CCC calculations, we have relaxed the frozen-core appro...
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Article
Open AccessCalculations of positron scattering from atomic oxygen
The single-center convergent close coupling (CCC) method has been applied to positron scattering from the oxygen atom. Cross sections have been calculated for total, elastic, momentum transfer, total ionizatio...
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Article
Open AccessDoubly differential cross sections for ionisation in proton–helium collisions at intermediate energies: energy and angular distribution of emitted electrons
Using the two-centre wave-packet convergent close-coupling approach, we continue our study of the proton–helium collision system. This method uses a correlated two-electron wave function to describe the helium...
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Article
Positron-impact direct ionization of lithium, sodium and potassium atoms
The distorted-wave and convergent close-coupling approaches are applied to positron-impact direct ionization of Li, Na and K. We find reasonable agreement between different theoretical approaches at higher ene...
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Article
Antihydrogen formation in low-energy antiproton collisions with excited-state positronium atoms
The convergent close-coupling method is used to obtain cross sections for antihydrogen formation in low-energy antiproton collisions with positronium (Ps) atoms in specified initial excited states with princip...
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Article
Open AccessQuantum suppression of antihydrogen formation in positronium-antiproton scattering
The interaction of antiprotons with low-energy positronium atoms is a fundamental three-body problem whose significance is its utility for formation of antihydrogen. Particular importance resides in understand...
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Article
Physics book: CRYRING@ESR
The exploration of the unique properties of stored and cooled beams of highly-charged ions as provided by heavy-ion storage rings has opened novel and fascinating research opportunities in the realm of atomic...
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Article
Experimental determination of the scattering length for positron scattering from krypton
We report the first experimentally supported determination of the scattering length for positron scattering from krypton. Our result of −10.3 ± 1.5 a.u. compares favourably with that from a convergent close ...
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Article
MicroRNAs 10a and 10b are potent inducers of neuroblastoma cell differentiation through targeting of nuclear receptor corepressor 2
MicroRNAs function as negative regulators of posttranscriptional gene expression, having major roles in cellular differentiation. Several neuroblastoma cell lines can be induced to undergo differentiation by a...
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Article
Double K-shell photoionization of low-Z atoms and He-like ions
We report on the investigation of the photon energy dependence of double 1s photoionization of light atoms and compare the cross sections for hollow atom and He-like ion production. Measurements of the Kα hype...
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Article
Near-threshold positron-hydrogen ionization
Ionization of hydrogen by positron impact near the breakup threshold is considered. The two-centre convergent close-coupling method is used. We find that convergence in the cross section is only practically ob...
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Chapter
Definition of Cross Sections for the Creation, Destruction, and Transfer of Atomic Multipole Moments by Electron Scattering: Quantum Mechanical Treatment
The rates for the creation, destruction, and transfer of atomic multipole moments by heavy-particle scattering have been studied for many years by Omont [1], by D'yakonov and Perel [2], and by Petrashen, Rebane, ...
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Chapter
Mechanisms of Photo Double Ionization of Helium by 530 eV Photons
We have measured fully differential cross sections for photo double ionization of helium 450 eV above the threshold using the COLTRIMS technique. We have found an extremely asymmetric energy sharing between th...
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Chapter
Convergent Close-Coupling Approach to Electron—Atom Collisions
The convergent close-coupling (CCC) method was developed in order to resolve the long-standing discrepancy between two consistent experiments and all available theories for 2p excitation of atomic hydrogen [1]...
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Article
Open AccessRecent trends and future directions for lung cancer mortality in Europe
Lung cancer mortality patterns throughout Europe are very heterogeneous and largely reflect past smoking habits. In order to clarify the changing patterns of lung cancer in Europe we have plotted the overall l...
