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FIZIKA A 12 (2003) 3 , 97 - 114
 
TEMPERATURE DEPENDENCE OF THE CROSS SECTION s5S FOR THE ENERGY POOLING PROCESS Na(3P) + Na(3P) ® Na(5S) + Na(3S)
VLASTA HORVATIĆ
Institute of Physics, Bijenička 46, HR-10000 Zagreb, Croatia
E-mail address: blecic@ifs.hr
Received 18 September 2003; Accepted 6 October 2003
Online 19 April 2004
Applying the method of laser induced fluorescence, the cross section s5S for the energy pooling
process Na(3P) + Na(3P) ® Na(5S) + Na(3S) has been
determined at temperatures in the interval from 567 to 676 K. It has been found that s5S decreases with increasing
temperature, exhibiting s5S
µ T-1.3 dependence. The
results show excellent agreement with the recent theoretical calculations. Also, the
determined temperature dependence of the cross section s5S fits very well into recently reported general s vs. T scheme for the exothermic collisional excitation energy
transfer cross sections, which includes various collision partners and various types of
collisional excitation energy transfer processes with different energy defects.
PACS numbers: 31.70.Hq, 34.50.-s, 34.50.Rk
UDC 535.353
Keywords: energy pooling process, Na(3P) + Na(3P) ® Na(5S)
+ Na(3S), laser induced fluorescence, collisional excitation energy transfer, cross
section
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