2015/10/10 by Neelam Neelam, Neelam, R. Chatterjee Shubhchintak +3
Medicine · Physics and Astronomy · #FOS: Physical sciences #Nuclear Physics and Applications #Nuclear Theory (nucl-th) #Nuclear physics research studies #Radiation Therapy and Dosimetry #nucl-th
paper · pdf · doi:10.48550/arxiv.1510.02897
8 pages, 8 figures, To be published in Phy. Rev. C
arxiv created 2015/10/10 · openalex publication_date 2015/10/10 · arxiv updated 2015/10/13 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
Purpose : The aim of this paper is to calculate the 15N(n, γ)16N radiative capture cross section and its subsequent reaction rate by an indirect method and in that process investigate the effects of spectroscopic factors of different levels of 16N to the cross section. Method : A fully quantum mechanical Coulomb breakup theory under the aegis of post-form distorted wave Born approximation is used to calculate the Coulomb breakup of 16N on Pb at 100 MeV/u. This is then related to the photodisintegration cross section of 16N(γ, n)15N and subsequently invoking the principle of detailed balance, the 15N(n, γ)16N capture cross section is calculated. Results : The non-resonant capture cross section is calculated with spectroscopic factors from the shell model and those extracted (including uncertainties) from two recent experiments. The data seems to favor a more single particle nature for the low-lying states of 16N. The total neutron capture rate is also calculated by summing up non-resonant and resonant (significant only at temperatures greater than 1 GK) contributions and comparison is made with other charged particle capture rates. In the typical temperature range of 0.1-1.2 GK, almost all the contribution to the reaction rate comes from capture cross sections below 0.25 MeV. Conclusion : We have attempted to resolve the discrepancy in the spectroscopic factors of low-lying 16N levels and conclude that it would certainly be useful to perform a Coulomb dissociation experiment to find the low energy capture cross section for the reaction, especially below 0.25 MeV.