Low-lying states inB8

Low-lying negative-ion states of calcium.

Low-lying electronic states of cyclopentadienone.

We report a combined experimental and theoretical study of the low-lying electronic states of cyclopentadienone (C5H4O). The cyclopentadienone anion (C5H4O(-)) was generated in the gas phase via reaction of atomic oxygen radical anions (O(-)) with cyclopentanone (C5H8O). Photoelectron imaging was used to gain access to the first three electronic states of C5H4O, including the X (1)A1 ground sta...

Low lying qqqqq̄ states in the baryon spectrum

The coupling to light mesons leads to large widths and shifts of the energy of the excited states in the baryon spectrum from the predictions of the constituent quark model with three valence quarks. This coupling may be modelled by admixtures of sea-quark qqq(qq̄) configurations in the resonances. Using the same schematic flavor and spin dependent interaction model, which reproduces the low lyi...

Low - Lying Electronic States of HCF - and HCF

The ground (lA’) and low-lying excited states (lA”, 3A”) of HCF and the ground (zA’’) and excited (2A’) states of HCFare examined via ab initio quantum-chemical methods. The anion is found t o be stable relative to HCF by at least 21.7 kcal/mol. The 2A” 2 A electronic transition in HCFis predicted to occur at 18 700 cm-l which is at higher energy than the (observed) corresponding transition (lA...

Branching ratios of 9C to low lying states in 9B.

near 2.9 MeV are 17+6% and 11+5%, respectively. Because of the three-body nature of the B decay, the C ions were implanted in the active volume of silicon detectors, and the total decay energies of the states in 'B were directly measured. We compare these results to shell model calculations, to the analog decay of Li to 'Be, and to the 98e(p,n) B reaction. The comparison to Li decay indicates a...