Naslov
Thermal stability of radiation-induced free radicals in gamma-irradiated l-alanine single crystals

Autori
Maltar-Strmečki, Nadica ; Rakvin, Boris

Izvornik
Applied radiation and isotopes (0969-8043) 63 (2005), 3; 375-380

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
l-alanin; EPR; stabilnost; radikali
(l-alanine; EPR; stability; radicals)

Sažetak
Decay of the radiation-induced stable free radicals in l-alanine single crystals and powders at the temperatures from 379 to 476 K was examined by electron paramagnetic resonance. For single crystals, the calculated activation energy of the radical decay is 104.3 +/- 1.7 kJ/mol (i.e. 12 538 +/- 202 K) and the frequency factor lnν 0 is 24.1 +/- 0.4 min -1. The lifetime of the radical in single crystals at 296 K is 162 years. The results confirm the long-term stability of the radicals, but the decay was found to be faster in large crystals than in powders.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA