منابع مشابه
Neutron 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 کاملDependence of direct neutron capture on nuclear-structure models
The prediction of cross sections for nuclei far off stability is crucial in the field of nuclear astrophysics. We calculate direct neutron capture on the even-even isotopes 124−145Sn and 208−238Pb with energy levels, masses, and nuclear density distributions taken from different nuclear-structure models. The utilized structure models are a Hartree-Fock-Bogoliubov model, a relativistic mean fiel...
متن کاملNuclear Halo Effects in Neutron–capture Reactions of Astrophysical Interest
The halo effect in the final states of astrophysically relevant direct neutron–capture reactions by neutron–rich nuclei is discussed. As an example, we calculate the cross sections for O(n,γ)O at thermonuclear and thermal energies.
متن کاملInternal Constitution of Neutron and Strange Stars
In the first of these two lectures I will discuss the rich constitution of neutron stars as a consequence of the Pauli principle which is engaged by the dominance of gravity over the nuclear force. Three especially interesting phenomena are discussed in this contect—(1) a mechanism for the formation of low-mass black holes distinct in their mass-range from the black holes formed in the prompt c...
متن کامل10B Concentration, Phantom Size and Tumor Location Dependent Dose Enhancement and Neutron Spectra in Boron Neutron Capture Therapy
Background: The amount of average dose enhancement in tumor loaded with 10B may vary due to various factors in boron neutron capture therapy.Objective: This study aims to evaluate dose enhancement in tumor loaded with 10B under influence of various factors and investigate the dependence of this dose enhancement on neutron spectra changes.Material and Methods: In this simulation stud...
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ژورنال
عنوان ژورنال: Nature
سال: 1936
ISSN: 0028-0836,1476-4687
DOI: 10.1038/137344a0