A comparison of ion irradiation and UV photolysis of CH4 and CH3OH

被引：111

作者：

Baratta, GA ^{[1
]}

Leto, G ^{[1
]}

Palumbo, ME ^{[1
]}

机构：

[1] Osserv Astrofis Catania, I-95123 Catania, Italy

来源：

ASTRONOMY & ASTROPHYSICS | 2002年 / 384卷 / 01期

关键词：

astrochemistry; molecular processes; methods : laboratory; techniques : spectroscopic; ISM : molecules;

D O I：

10.1051/0004-6361:20011835

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have studied by infrared absorption spectroscopy the effects induced by fast ions (30 keV) and Lyman-alpha photons (10.2 eV) on some molecular ices at low temperature (10-20 K). It is well known that in both cases the physical and chemical properties of the ices are modified. However while the energy released by ions depends mainly on their energy and on the target species, the effects induced by photons also depend on the optical properties of the sample. Here we show that the effects of ion irradiation and UV photolysis are comparable on fresh ices (i.e. at low doses) but are increasingly different as processing is continued (i.e. at high doses).

引用

页码：343 / 349

页数：7

共 30 条

[1] PHOTOCHEMICAL AND THERMAL EVOLUTION OF INTERSTELLAR PRECOMETARY ICE ANALOGS [J].