https://doi.org/10.1007/s100530050074
Energy pooling to the Ba 6s6p 1P10 level arising from collisions between pairs of metastable Ba 6s5d 3DJ atoms
1
Institute of Physics, Bijenicka 46, 10000 Zagreb, Croatia
2
Institut für Spektrochemie und Angewandte Spektroskopie (ISAS), Bunsen-Kirchhoff-Strasse
11, 44129 Dortmund, Germany
Corresponding author: a vadla@ifs.hr
Received:
11
April
1997
Revised:
24
September
1997
Accepted:
10
December
1997
Published online: 15 February 1998
The energy-pooling rate coefficient for the
process has been measured. The barium atoms
were excited by a cw diode laser
tuned to the frequency of the 791.3 nm intercombination
line and the metastable atoms in the
6s5d
state were produced due to radiative
and collisional depopulation of the laser-excited
6s6p
state. The measurements were
performed at
number densities of about
and at 30 mbar argon as the buffer gas. Most of the barium ground state atoms in the
excitation zone were transferred to the triplet metastable state at the laser pump power
applied. The energy pooling rate coefficient was determined by comparing the fluorescence
intensity of the barium 553.6 nm resonance line and the fluorescence intensity of the
intercombination line 791.3 nm. In addition, the populations of the metastable atoms were
probed with low intensity laser radiation from a single mode ring dye laser. The rate
coefficient was found to be
.
PACS: 34.50.-s – Scattering of atoms, molecules, and ions / 32.00. – Atomic properties and interactions with photons
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1998