FIZIKA A 12 (2003) 3 , 97 - 114

TEMPERATURE DEPENDENCE OF THE CROSS SECTION s_5S 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: [email protected]

Received 18 September 2003;  Accepted 6 October 2003
Online 19 April 2004

Applying the method of laser induced fluorescence, the cross section s_5S 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 s_5S decreases with increasing temperature, exhibiting s_5S µ T^-1.3 dependence. The results show excellent agreement with the recent theoretical calculations. Also, the determined temperature dependence of the cross section s_5S 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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