The first stars in the early Universe were formed about 400 million years after the big bang. Verification of the existence of these stars is important for our understanding of the evolution of the Universe[1]. It has...The first stars in the early Universe were formed about 400 million years after the big bang. Verification of the existence of these stars is important for our understanding of the evolution of the Universe[1]. It has been predicted that for Population-III stellar production yields, the abundances of odd-Z elements are remarkably deficient compared to their adjacent even-Z elements[2]. Astronomers are searching for long-lived, low mass stars with the unique nucleosynthetic pattern matching the predicted yields[3].展开更多
The correlation between quarter-point angle of elastic scattering and nuclear matter radius is studied systematically.Various phenomenological formulae with parameters for nuclear radius are adopted and compared by fi...The correlation between quarter-point angle of elastic scattering and nuclear matter radius is studied systematically.Various phenomenological formulae with parameters for nuclear radius are adopted and compared by fitting the experimental data of quarter point angle extracted from nuclear elastic scattering reaction systems.A parameterized formula related to binding energy is recommended,which gives a good reproduction of nuclear matter radii of halo nuclei.It indicates that the quarter-point angle of elastic scattering is quite sensitive to the nuclear matter radius and can be used to extract the nuclear matter radius.展开更多
文摘The first stars in the early Universe were formed about 400 million years after the big bang. Verification of the existence of these stars is important for our understanding of the evolution of the Universe[1]. It has been predicted that for Population-III stellar production yields, the abundances of odd-Z elements are remarkably deficient compared to their adjacent even-Z elements[2]. Astronomers are searching for long-lived, low mass stars with the unique nucleosynthetic pattern matching the predicted yields[3].
基金Supported by National Natural Science Foundation of China(U1432247,11575256)National Basic Research Program of Chin(973 Program)(2014CB845405 and 2013CB83440x)(SM)Chinese Academy of Sciences President’s International Fellowship Initiativ(2015-FX-04)
文摘The correlation between quarter-point angle of elastic scattering and nuclear matter radius is studied systematically.Various phenomenological formulae with parameters for nuclear radius are adopted and compared by fitting the experimental data of quarter point angle extracted from nuclear elastic scattering reaction systems.A parameterized formula related to binding energy is recommended,which gives a good reproduction of nuclear matter radii of halo nuclei.It indicates that the quarter-point angle of elastic scattering is quite sensitive to the nuclear matter radius and can be used to extract the nuclear matter radius.
