Recombination energy accommodation of hydrogen at the surface of liquid helium

✍ Scribed by Sergey Vasilyev; Esa Tjukanov; Michael Mertig; Simo Jaakkola

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 144 KB
• Volume: 194-196
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(94)90548-7

✦ Synopsis

Atoms of polarized hydrogen gas H,I. have been excited into spin-flipped states 1-11" by using electron-spin resonance at 128 GHz. We have monitored the heat liberated in subsequent ~ + H$ recombinations on the surface of a carbon bolometer covered with a liquid *He film at temperatures between 130 mK and 280 mK. We observe that less than 10 % of the recombination energy iS submerged directly to the liquid at the recombination site. The excited 1-/2 molecules are found to undergo on the average more than 100 surface collisions before relaxing half of their rovibrational energy.