Krajcar Bronić I, Srdoc D, Obelić B
Rudjer Bosković Institute, Zagreb, Yugoslavia.
Radiat Res. 1991 Jan;125(1):1-5.
The mean energy required to form an ion pair for 5.89-keV 55Fe and 1.49-keV Al photons in mixtures of argon-methane and argon-butane gas was measured using the proportional-counter technique. The measured W values in the mixtures are lower than what is expected for regular mixtures, i.e., mixtures without an appreciable intermolecular energy transfer between the mixture components. The additional ionization yield through the nonmetastable Penning processes reaches a maximum abruptly at very low partial pressure of polyatomic admixtures (alkanes), decreasing steadily with higher admixture partial pressure.
使用正比计数器技术测量了5.89 keV的⁵⁵Fe和1.49 keV的Al光子在氩 - 甲烷和氩 - 丁烷气体混合物中形成离子对所需的平均能量。混合物中测得的W值低于常规混合物（即混合物各组分之间不存在明显分子间能量转移的混合物）的预期值。通过非亚稳态潘宁过程产生的额外电离产额在多原子混合物（烷烃）的极低分压下突然达到最大值，并随着混合物分压的升高而稳步下降。
