نتایج جستجو برای: nuclear reaction and scattering

تعداد نتایج: 16945123  

Journal: :The British journal of ophthalmology 2000
W Qian P G Söderberg E Chen K Magnius B Philipson

AIM To determine if 3 year treatment of hypercholesterolaemia with simvastatin causes an increase of lens nuclear back scattering. METHODS 160 patients with hypercholesterolaemia in the Scandinavian Simvastatin Survival Study (4S) were followed for 3 years. Half (80) of the patients took simvastatin and half (80) received placebo. The lens was photographed with a Topcon SL-45 slit lamp camera...

Journal: :Physical review letters 2015
M P Minitti J M Budarz A Kirrander J S Robinson D Ratner T J Lane D Zhu J M Glownia M Kozina H T Lemke M Sikorski Y Feng S Nelson K Saita B Stankus T Northey J B Hastings P M Weber

Structural rearrangements within single molecules occur on ultrafast time scales. Many aspects of molecular dynamics, such as the energy flow through excited states, have been studied using spectroscopic techniques, yet the goal to watch molecules evolve their geometrical structure in real time remains challenging. By mapping nuclear motions using femtosecond x-ray pulses, we have created real-...

Journal: :IEEE Transactions on Nuclear Science 1983

2016
K. Osamura H. Okuda K. Asano M. Furusaka K. Kishida F. Kurosawa K. OSAMURA

Small-angle neutron scattering ( SANS ) measurements were mainly carried out in order to investigate the structure change during early stage of phase decomposition in Fe-Cu-Ni-Mn quaternary alloy. The fact that the nuclear Guinier radius becomes larger than the magnetic one beyond about 2 nm is attributed to the formation of segregated layer enriched by Ni and Mn around fcc copper-rich precipit...

Journal: :Physical review letters 2007
A Tumino C Spitaleri A Mukhamedzhanov G G Rapisarda S Cherubini V Crucillá Z Elekes Z Fülöp M Gulino G Gyürky G Kiss M La Cognata L Lamia F Mudó R G Pizzone S Romano M L Sergi E Somorjai

Off-energy-shell effects in p - p scattering have been investigated at p - p relative energies from 600 down to 80 keV applying the Trojan horse method (THM) to the p + d --> p + p + n reaction at 5 MeV. In contrast with the on-energy-shell case, no Coulomb-nuclear interference minimum has been found in the extracted THM p - p cross section, due to the suppression of the Coulomb amplitude as pr...

2002
S. YU. KUN A. V. VAGOV

We present a simple physical explanation that measurements of the collision crosssections with pure energy resolution can provide information on the reaction dynamics equivalent to that obtained using real-time methods of femtochemistry. For nuclear collisions, the method provides a time resolution of ∼ 10−21 sec. The method is sensitive enough to distinguish between the different scenarios of ...

1999
A. Sibirtsev W. Cassing

We study the antikaon potential at finite momentum for proton and neutron nuclear matter. Our approach is based on the momentum dependence of the real part of the total K − N scattering amplitude, which is fixed in free space by experimental data, using the dispersion relation approach. We decompose the contributions to the scattering amplitude from different processes and consider the Λ(1405) ...

Journal: :Physical Review C 2021

The study of CNO cycle involves the examination proton radiative capture, or $(p,\gamma)$ reactions below 2 MeV. astrophysical $\mathcal{S}$ factor characterizing reaction is usually reduced to electric dipole transition $E1$ from scattering state bound state. In this work, partial and single-particle wave functions in matrix element are obtained single self-consistent mean-field potential dedu...

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