TEMPERATURE-DEPENDENT DEPOLARIZATION CROSS SECTIONS OF THE 5d6p 3P1 AND 3D1 
STATES OF LASER-ABLATED Ba IN He GAS IN THE RANGE 10-300 K.

Takashi Nakajima#, Nobuaki Yonekura*, Yukari Matsuo+, Qin Hui+ and Michio
Takami+

# Institute of Advanced Energy, Kyoto University, Kyoto 611-0011, Japan
*Faculty of Science, University of the Ryukyus, Okinawa 903-0213, Japan
+The institute of Physical and Chemical Research (RIKEN), Saitama 351-01, Japan

The laser-ablation technique has been applied to the study of depolarization
effects of the 5d6p 3P1 and 3D1 
states of Ba with He gas in the wide temperature range of 10 -300 K. The
depolarization cross sections 
of both states have been found to have a positive temperature dependence,
indicating that the responsible
interaction is not a van der Waals type.