67,953 research outputs found
ab initio frame transformation calculations of direct and indirect dissociative recombination rates of HeH+ + e-
The HeH cation undergoes dissociative recombination with a free electron
to produce neutral He and H fragments. We present calculations using ab initio
quantum defects and Fano's rovibrational frame transformation technique, along
with the methodology of PRL 89, 263003 (2002), to obtain the recombination rate
both in the low-energy (1-300 meV) and high-energy (ca. 0.6 hartree) regions.
We obtain very good agreement with experimental results, demonstrating that
this relatively simple method is able to reproduce observed rates for both
indirect dissociative recombination, driven by rovibrationally autoionizing
states in the low-energy region, and direct dissociative recombination, driven
by electronically autoionizing Rydberg states attached to higher-energy excited
cation channels.Comment: Submitted to Phys Rev
Approaches to Faith, Guest Editorial Preface
Springer. We find in contemporary culture starkly contrasting estimates of the value of faith. On the one hand, for many people, faith is a virtue or positive human value, something associated with understanding, hope, and love, something to be inculcated, maintained, and cherished. On the other hand, for many people, faith is a vice, something associated with dogmatism, arrogance, and close-mindedness, something to be avoided at all costs. The papers included in this special (double) issue on approaches to faith explore questions about faith in a variety of settings through a diverse range of examples, both secular and religious. The attempt to deepen our understanding of faith in the context of ordinary human relationships (e.g., between parents and children, friends, generals and their armies, business partners, citizens and the state), a commitment to ideals, or the pursuit of significant goals is clearly of general philosophical interest, as is the examination of potential connections between faith and topics such as trust or reliance
Estimates of rates for dissociative recombination of NO + e via various mechanisms
We estimate rates for the dissociative recombination (DR) of NO +
e. Although accurate excited state potential energy curves for the excited
states of the neutral are not available, we estimate that the 1 {\Phi}
and the 1 {\Pi} states of the neutral may intersect the ground state
cation potential energy surface near its equilibrium geometry. Using fixed
nuclei scattering calculations we estimate the rate for direct DR via these
states and find it to be significant. We also perform approximate calculations
of DR triggered by the indirect mechanism, which suggest that the indirect DR
rate for NO is insignificant compared to the direct rate.Comment: Submitted to Phys Rev
- β¦