Neutron capture rates nearA=130that effect a global change to ther-process abundance distribution
نویسندگان
چکیده
منابع مشابه
Stellar neutron capture rates – key data for the s process
Neutron reactions are responsible for the formation of the elements heavier than iron. The corresponding scenarios relate to the Heand Cburning phases of stellar evolution (s process) and to supernova explosions (r and p processes). The s process, which is characterized by low neutron densities, operates in or near the valley of β-stability and has produced about half of the elemental abundance...
متن کاملASTROPHYSICAL NEUTRON CAPTURE RATES IN s– AND r–PROCESS NUCLEOSYNTHESIS
Astrophysical neutron capture rates of light and heavy nuclei have been measured and calculated. For the measurements the activation technique was applied at the 3.75 MV Karlsruhe Van de Graaff accelerator, and at the Geel electron linear accelerator (GELINA) the time–of–flight (TOF) method was used. The calculations were performed using direct and compound nuclear capture models.
متن کاملSolar Abundance of Elements from Neutron-capture Cross Sections
Introduction: Light elements, H and He, covering the solar surface are widely believed to be dominant inside the Sun [1]. Noting that gaseous envelopes may not reflect the Sun’s internal composition, Harkins [2] used analyses on 443 meteorites to conclude that Fe, O, Ni and Si are more abundant. B2FH [3] explained element synthesis in stars; decades later Fowler said laboratory and theoretical ...
متن کاملThe Use of Mist-net Capture Rates to Monitor Annual Variation in Abundance: a Validation Study’
Constant-effort mist-netting has become an increasingly popular tool in longterm monitoring of bird populations. Monitoring programs often assume that variation in the capture rates of adults reflects variation in breeding densities of the sampled population. We test this assumption by comparing annual variation in mist-net capture rates to known variation in breeding densities of four species ...
متن کاملNeutron Capture and Neutron Halos
The connection between the neutron halo observed in light neutron rich nuclei and the neutron radiative capture process is outlined. We show how nuclear structure information such as spectroscopic factors and external components of the radial wave function of loosely bound states can be derived from the neutron capture cross section. The link between the direct radiative capture and the Coulomb...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review C
سال: 2009
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.79.045809