Results 21 to 30 of about 337,692 (304)

Vibrational Excitation Cross-Section by Positron Impact: A Wave-Packet Dynamics Study

Atoms, 2021
The vibrational excitation cross-section of a diatomic molecule by positron impact is obtained using wave-packet propagation techniques. The dynamics study was carried on a two-dimensional potential energy surface, which couples a hydrogenlike harmonic ...
Luis A. Poveda, Marcio T. do N. Varella, José R. Mohallem   +2 more
doaj   +1 more source

Kinematically complete experiments for positron-impact ionization of helium atoms at the NEPOMUC facility [PDF]

, 2011
12th International Workshop on Slow Positron Beam Techniques (SLOPOS12), 1–6 August 2010, Magnetic Island, North Queensland, AustraliaPositron impact ionization of helium is studied with fully resolved momentum vectors of all continuum particles.
Senftleben, A., J C Lower, Buckman, S., Senftleben, A, J Ullrich, Holzwarth, M, Hargreaves, Leigh Randall, Hargreaves, L.R., M Holzwarth, Ullrich, Joachim, Lower, J., X Ren, S J Buckman, Lohmann, Birgit, J P Sullivan, Slaughter, D., B Lohmann, T Pflüger, Slaughter, Daniel, Dorn, A., Ren, X, Lohmann, B., A Dorn, Sullivan, J., Sullivan, James, Dorn, Alexander R, Buckman, Stephen J., Pflüger, T, Sullivan, J. P., D S Slaughter, Ullrich, J., A Senftleben, Hargreaves, L., Holzwarth, M., Ren, X. N., Lower, Julian, Pfluger, T., Buckman, Stephen, Slaughter, D. S., Ren, X., L R Hargreaves   +40 more
core   +1 more source

ELECTRON-POSITRON- COLLIDERS [PDF]

International Journal of Modern Physics A, 2002
An electron-positron linear collider in the energy range between 500 and 1000 GeV is of crucial importance to precisely test the Standard Model and to explore the physics beyond it. The physics program is complementary to that of the Large Hadron Collider.
openaire   +2 more sources

Imaging plasma docosahexaenoic acid (dha) incorporation into the brain in vivo, as a biomarker of brain DHA: Metabolism and neurotransmission

Oléagineux, Corps gras, Lipides, 2011
Docosahexaenoic acid (DHA) is critical for normal brain structure and function, and its brain concentration depends on dietary DHA content and hepatic conversion from its dietary derived n-3 precursor, a-linolenic acid (α-LNA).
Rapoport Stanley I., Ramadan Epolia, Basselin Mireille   +2 more
doaj   +1 more source

The three-center two-positron bond [PDF]

, 2022
peer reviewedComputational studies have shown that one or more positrons can stabilize two repelling atomic anions through the formation of two-center positronic bonds.
Pedraza González, Laura Milena, Moncada, Felix, TKATCHENKO, Alexandre, CHARRY MARTINEZ, Jorge Alfonso, Varella, Marcio Teixeira, Reyes, Andrés, BARBORINI, Matteo   +6 more
core   +1 more source

Study of Positron Impact Scattering from Methane and Silane Using an Analytically Obtained Static Potential with Correlation Polarization

Atoms, 2021
A detailed study of positron impact elastic scattering from methane and silane is carried out using a model potential consisting of static and polarization potentials.
Dibyendu Mahato, Lalita Sharma, Rajesh Srivastava   +2 more
doaj   +1 more source

Simulations of pulses in a buffer gas positron trap [PDF]

, 2016
In this study we simulate positron transport properties for various configurations of the gases and electric fields used in the Australian Positron Beamline Facility positron trap, which is based on the Surko buffer-gas trap.
Robson, Robert E., White, Ronald Douglas, Sullivan, James, Buckman, Stephen, Tattersall, Wade   +4 more
core   +1 more source

The aluminium-[18F]fluoride revolution: simple radiochemistry with a big impact for radiolabelled biomolecules

EJNMMI Radiopharmacy and Chemistry, 2021
The aluminium-[18F]fluoride ([18F]AlF) radiolabelling method combines the favourable decay characteristics of fluorine-18 with the convenience and familiarity of metal-based radiochemistry and has been used to parallel gallium-68 radiopharmaceutical ...
Stephen J. Archibald, Louis Allott
doaj   +1 more source

Ovarian Sex Cord Stromal Tumors in Children and Adolescents—The European Standard Clinical Practice Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider, Kris‐Ann Schultz, Nora Schnitzler, Michael Abele, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Ines B. Brecht, Maja Cesen, Andrea Ferrari, Michaela Kuhlen, Malgorzata A. Krawczyk, Ricardo Lopez‐Almaraz, Yves Reguerre, Calogero Virgone, Daniel Orbach   +15 more
wiley   +1 more source

Positron emission tomography compartmental models: A basis pursuit strategy for kinetic modelling

, 2002
A kinetic modelling approach for the quantification of in vivo tracer studies with dynamic positron emission tomography (PET) is presented. The approach is based on a general compartmental description of the tracer’s fate in vivo and determines a ...
Roger N. Gunn, Gunn, S R, Turkheimer, F E ; id_orcid, Aston, J A D, John A. D. Aston, Cunningham, T J, Turkheimer, F.E., Aston, J.A.D., Gunn, S.R., Gunn, R.N., Federico E. Turkheimer, Steve R. Gunn, Vincent J. Cunningham, Cunningham, V.J., Gunn, R N   +14 more
core   +2 more sources