Neutron Density Distributions of Neutron-Rich Nuclei Studied with the Isobaric Yield Ratio Difference

The isobaric yield ratio difference (IBD) between two reactions of similar experimental setups is found to be sensitive to nuclear density differences between projectiles. In this article, the IBD probe is used to study the density variation in neutron-rich $^{48}$Ca. By adjusting diffuseness in the neutron density distribution, three different neutron density distributions of $^{48}$Ca are obtained. The yields of fragments in the 80$A$ MeV $^{40, 48}$Ca + $^{12}$C reactions are calculated by using a modified statistical abrasion-ablation model. It is found that the IBD results obtained from the prefragments are sensitive to the density distribution of the projectile, while the IBD results from the final fragments are less sensitive to the density distribution of the projectile.Comment: 3 figure

Full counting statistics of renormalized dynamics in open quantum transport system

The internal dynamics of a double quantum dot system is renormalized due to coupling respectively with transport electrodes and a dissipative heat bath. Their essential differences are identified unambiguously in the context of full counting statistics. The electrode coupling caused level detuning renormalization gives rise to a fast-to-slow transport mechanism, which is not resolved at all in the average current, but revealed uniquely by pronounced super-Poissonian shot noise and skewness. The heat bath coupling introduces an interdot coupling renormalization, which results in asymmetric Fano factor and an intriguing change of line shape in the skewness.Comment: 9 pages, 5 figure

DETERMINANTS AFFECTING THE CAPITAL STRUCTURE DECISION OF A FIRM (A CASE STUDY OF TEXTILE SECTOR IN PAKISTAN)

In this paper, we have examined the influence of specific factors based on a capital structure sample of five Pakistani textile sector (Leveraged) companies. The secondary data came from an analysis of the balance sheets of five companies listed on the Karachi Stock Exchange between 2004 and 2014.Regression and correlation analysis on the panel data shows that profitability is negatively correlated with leverage ratio, while tangibility is positively correlated with leverage ratio, but not significantly. Firm size and firm growth are also positively and significantly correlated with leverage. Return on equity is also negatively correlated with leverage. Our findings also show that large textile firms, compared with small ones, finance long-term through debt. Keywords: Capital Structure, Return on equity, Profitability, Tangibility, Leverage, Debt to equity ratio, Pakistan