Chemical equilibrium in argon: Anomaly of density dependence of dimerization reaction in the medium density region

1989 ◽  
Vol 91 (4) ◽  
pp. 2758-2759 ◽  
Author(s):  
Y. Kimura ◽  
Y. Yoshimura ◽  
M. Nakahara
Keyword(s):  
Density Dependence ◽  
Chemical Equilibrium ◽  
Medium Density ◽  
Density Region ◽  
Dimerization Reaction

Density dependence of the Hanle effect of the 4s4p1P1 level of neutral calcium

1980 ◽  
Vol 58 (7) ◽  
pp. 1004-1009 ◽  
Author(s):  
F. M. Kelly ◽  
M. S. Mathur
Keyword(s):  
Density Dependence ◽  
High Density ◽  
Low Density ◽  
Density Region ◽  
Hanle Effect ◽  
Wide Range ◽  
High Density Region

The Hanle effect in the 4s21S0–4s4p1P1 (4226.7 Å) transition in Ca I has been observed over a wide range of densities. The low density observations determine the lifetime of the 1P1 level to be 4.49 ns. Collision parameters are obtained from observations in the high density region.

Anomalous density dependence of the v1 band of carbon dioxide in pressure-induced absorption

1970 ◽  
Vol 48 (1) ◽  
pp. 95-98 ◽  
Author(s):  
L. Mannik ◽  
A. R. W. McKellar ◽  
N. Rich ◽  
J. C. Stryland
Keyword(s):  
Carbon Dioxide ◽  
Density Dependence ◽  
Density Variation ◽  
Linear Term ◽  
Density Region ◽  
Induced Absorption ◽  
Active Absorption ◽  
Anomalous Density ◽  
Density Expansion

The anomaly in the density variation of the integrated absorption of the pressure-induced v1 band of carbon dioxide is shown experimentally to be represented by a linear term in the density expansion of the intensity, which is important only in the lower density region (0–20 amagat). A calculation indicates that the linear term arises from the infrared-active absorption of the v1 band of C16O18O.

Constraints on the equation of state of neutron star matter based on observations

2017 ◽  
Vol 32 (37) ◽  
pp. 1750190
Author(s):  
Quang Thin Ngo ◽  
Shoji Shinmura
Keyword(s):  
Neutron Star ◽  
Equation Of State ◽  
Energy Density ◽  
Observational Data ◽  
Rapid Change ◽  
Saturation Density ◽  
Statistical Analyses ◽  
Medium Density ◽  
Neutron Star Matter ◽  
Density Region

Many calculations of the neutron star (NS) equation of state (EOS) have been performed over the years. Recent observations of NSs have begun to play an important role in finding the realistic EOS. In this paper, we compare mass–radius relations derived from various EOSs with observational data of NSs. In addition, we adjust EOSs to be consistent with observational data from NSs and employ Bayesian statistical analyses to obtain constraints on the EOS. Our results show that the EOS needs to be softened in the medium density region ([Formula: see text]–[Formula: see text], where [Formula: see text] is the saturation density) and to have a rapid change of stiffness around an energy density of [Formula: see text] 650 MeV/fm3.

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