What is an H II region? A. A region of hot, ionized hydrogen around one or more O and B stars. B. A region of molecular hydrogen inside a giant molecular cloud. C. A region of neutral, atomic hydrogen in interstellar space. D. A region of gas and dust for ...
We see significant production of atomic products subsequently ionized when the two-photonresonant state has a long bond length but we see only HCl + when the resonant state is of Rydberg origin (and hence has a short bond length). The state at 82780 cm 1, assigned as the E 1Σ +(ν ...
Charge-exchange reactions between a fully ionized stellar wind and the partially ionized warm gas in the interstellar medium create a compressed region of hot neutral hydrogen atoms that are decelerated relative to the inflowing interstellar gas. This “hydrogen wall” produces a blue-shifted absorpti...
Peptides and proteins ionized by ESI under acidic conditions acquire multiple charges, z being roughly proportional to m, with m/z in the range 500–1500. In practice a distribution of charges gives multiple peaks in the mass spectrum, the spacing of which allows z to be calculated. The ...
The typical value of should not be far from the value of the number of electrons per ion of ionized H or He (e.g., around 1 or 2), although it will depend on other factors mentioned above. For example, at low-temperature stars (e.g., T<104K), the value of would break down ...
Charge-exchange reactions between a fully ionized stellar wind and the partially ionized warm gas in the interstellar medium create a compressed region of hot neutral hydrogen atoms that are decelerated relative to the inflowing interstellar gas. This "hydrogen wall" produces a blue-shifted absorption...
The time of elution is referred to as a compound's retention time. GC has the capacity to resolve complex mixtures or sample extracts containing hundreds of compounds. Once the components leave the GC column, they are ionized and fragmented by the ...
Secondary ion mass spectroscopy (SIMS) is possible on DualBeam (FIB-SEM) tools as ionized particles are generated by the FIB milling process; because these particles come from a very shallow depth it is considered a surface analysis technique. Modern SIMS detectors are compact and well suited fo...
Atmospheric hydrodynamic escape sculpts the population of low-mass close-in planets. However, distinguishing between the driving mechanisms responsible for the hydrodynamic escape of hydrogen-rich atmospheres is a complex task due to the involvement of many physical factors. Using simulations, I show th...
We investigate the gas-phase structures and fragmentation chemistry of two isomeric sodium-cationized carbohydrates using combined tandem mass spectrometry, hydrogen/deuterium exchange experiments, and computational methods. Our model sy... JM Rabus,MT Abutokaikah,RT Ross,... - 《Physical Chemistry Che...