Sökning: "cross-sections"

Visar resultat 16 - 20 av 293 avhandlingar innehållade ordet cross-sections.

1. 16. The (γ,p) reaction in 16O and 18O at Eγ=50 - 70 MeV

   Författare :Per Lilja; Lunds universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; 16O γ; Photonuclear reactions; 18O γ; p ; E= 50 - 70 MeV; tagged photons; differential cross sections; Nuclear physics; Kärnfysik; Fysicumarkivet A:2004:Lilja;

   Sammanfattning : A measurement of the reactions 16O(γ,p)15N and 18O(γ,p)17N have been made with tagged photons in the energy range Eγ ≈ 50 – 70 MeV. The protons have been detected in ΔE-E telescopes with silicon strip detectors as ΔE detectors and HPGe crystals as E detectors. LÄS MER

3. 17. Two-body Photodisintegration of ³He

   Författare :Martin Karlsson; Kärnfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; differential cross sections; three-nucleon forces; MAX-lab; tagged photons; Nuclear physics; Kärnfysik; Fysicumarkivet A:000;

   Sammanfattning : In a series of experiments using the tagged photon facility at MAX-lab located in Lund, Sweden, the two-body photodisintegration of ³He has been investigated in the photon energy range 14--32 MeV. Differential cross sections of the reaction ³He(g,d) have been measured by detecting deuterons and protons in silicon surface barrier detectors. LÄS MER

4. 18. Compton Scattering from the Deuteron at Low Energies

   Författare :Magnus Lundin; Lunds universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Compton scattering; photonuclear reactions; deuteron; differential cross sections; 50-70 MeV; polarizability; tagged photons; Nuclear physics; Kärnfysik; Fysicumarkivet A:2002:Lundin;

   Sammanfattning : A series of three Compton scattering experiments on deuterium have been performed at the high-resolution tagged-photon facility MAX-lab located in Lund, Sweden. The 50 < Eg < 70 MeV tagged photons were scattered from a liquid deuterium target and detected simultaneously in three (10"x10") NaI detectors. LÄS MER

5. 19. Development of Monte Carlo track structure simulations for protons and carbon ions in water

   Författare :Thiansin Liamsuwan; Hooshang Nikjoo; Shuzo Uehara; David Liljequist; Michael Dingfelder; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Radiation track structure; Monte Carlo simulations; interaction cross sections; classical trajectory Monte Carlo CTMC method; microdosimetry; ion beams; Medical Radiation Physics; medicinsk strålningsfysik;

   Sammanfattning : The goal of radiation therapy is to eradicate tumour cells while minimising radiation dose to healthy tissues. Ions including protons and carbon ions have gained increasing interest for cancer treatment. LÄS MER

7. 20. Epitaxy, analysis and application of semi-insulating III-V materials

   Författare :David Söderström; KTH; []
   Nyckelord :InP; GaInP; semi-insulating materials; iron doping; ruthenium doping; HVPE; diffusion; deep levels; capture cross sections; resistivity analysis; buried heterostructure laser;

   Sammanfattning : Semi-insulating (SI) III-V materials can provide electricalisolation for integration and capacitance minimisation for highspeed operation. Compared to the polyimides, these can offerbetter thermal conduction. Ever since the fabrication of thefirst SI III-V materials, transition metals have been utilisedas deep impurities to impart SI properties. LÄS MER