Ultraslow isomerization in photoexcited gas-phase carbon cluster $${{\rm C}}_{10}^ -$$ C 10 -

Gas-phase Β-pinene Isomerization over Acid-activated Bentonite

−− The kinetics of the gas-phase isomerization of β-pinene over an acid-activated bentonite clay has been investigated in a fixed-bed continuous flow reactor, at atmospheric pressure between 58 and 90 C. The major isomers produced were camphene, α-pinene and limonene. The reaction rates of β-pinene conversion and the apparent activation energy were determined. The kinetics of β-pinene isomeriza...

Measurement of the Regeneration Phase in Carbon from 4 to 10 GeV/c

(1964)]. ~J. J. Aubert et a/. , Phys. Rev. Lett. 33, 1404 (1974). 2J.-E. Augustin et al. , Phys. Bev. Lett. 33, 1406 (1974). 3G. S. Abrams et al. , Phys. Bev. Lett. 33, 1453 (1974). A. De R6jula and S. L. Glashow, Phys. Bev. Lett. 34, 46 (1975); T. Appelquist, A. De Rujula, H. D. Politzer, and S. L. Glashow, Phys. Rev. Lett. 34, 365 (1975); S. Borchardt, V. S. Mathur, and S. Okubo, Phys. Rev. L...

Infrared Photodissociation Spectroscopy of Cluster Anions in the Gas Phase

Carbon abundances and 12 C / 13 C from globular cluster

The behaviour of the ∆ν=2 CO bands around 2.3 μm was examined by comparing observed and synthetic spectra in stars in globular clusters of different metallicity. Changes in the C/C isotopic ratio and the carbon abundances were investigated in stars from 3500–4900 K in the galactic globular clusters M71, M5, M3 and M13, covering the metallicity range from –0.7 to –1.6. We found relatively low ca...

Experimental vibrational spectra of gas-phase tantalum cluster cations.

We present gas-phase infrared spectra of tantalum cluster cations containing 6-20 atoms. Infrared multiple photon dissociation of their complexes with argon atoms is used to obtain vibrational spectra in the region between 90 and 305 cm(-1). Many spectra have features in common with the vibrational spectra of the lighter homologs, vanadium and niobium, pointing to a common cluster growth mechan...