Experiments with neutron beams for the astrophysical s process
نویسندگان
چکیده
Neutron capture cross sections are the key nuclear physics input to study the slow neutron capture process, which is responsible for forming about half of the elemental abundances above Fe. Stellar neutron capture cross section can be measured by the time-of-flight technique, or by activation. Both techniques will be discussed and recent experiments in the Fe/Ni mass region will be presented.
منابع مشابه
بررسی امکان استفاده از چشمه های نوترونی رادیوایزوتوپی در نوترون درمانی با بور
Background : Performing successful BNCT experiments needs a suitable neutron source. Important factors of the neutron beam are flux and energy that are very important in the selection of neutron source. In most centers that use this method for treatment, reactor is a neutron source, which according to characteristics of the reactor appropriated neutrons are very high. High cost of constructin...
متن کاملDental Materials Effect in Neutron Contamination: Electron Mode of a Linac
Background: Neutron contamination is produced in electron beams of linac when tooth or dental materials are located in the path of beam. Objective: This study aims to determine the neutron dose contamination from different dental restoration materials in electron mode of a linac. Material and Methods: In this experimental study, the neutron dose contamination was calculated in the p...
متن کاملStellar Abundances: Better Measured Than Predicted
If gold had been as abundant on earth as iron, it wouldn’t be as famous for its rarity. If a tiny screw in the cosmic kitchen had been turned by just a bit, iron might have been the one that was most rare and desired, but during the creation of the Universe the course was set differently. Clarifying what astrophysical conditions could explain the observed elemental abundances depends on precise...
متن کاملHow astrophysical neutrino sources could be used for early measurements of neutrino mass hierarchy and leptonic CP phase
We discuss the possible impact of astrophysical neutrino flux measurements at neutrino telescopes on the neutrino oscillation program of reactor experiments and neutrino beams. We consider neutrino fluxes from neutron sources, muon damped sources, and pion sources, where we parameterize the input from these sources in terms of the flux ratio R = φμ/(φe+ φτ ) which can be extracted from the muon...
متن کاملDetermination of astrophysical nuclear reaction rates using light neutron-rich RNBs
Excitation functions of 8 Li(, n), (d, t) and 12 B(, n) reactions were directly measured in the energy region of astrophysical interest using low-energy radioactive nuclear beams of 8 Li and 12 B. Each measured excitation function is strongly affected by one or more resonances through a compound nucleus. The measured excitation functions are presented. Dominant r-process paths through 8 Li at...
متن کامل