FRAGMENTATION DYNAMICS OF AMMONIA CLUSTER IONS AFTER SINGLE PHOTON IONIZATION

被引：34

作者：

KAISER, E ^{[1
]}

DEVRIES, J ^{[1
]}

STEGER, H ^{[1
]}

MENZEL, C ^{[1
]}

KAMKE, W ^{[1
]}

HERTEL, IV ^{[1
]}

机构：

[1] UNIV FREIBURG,FREIBURGER MAT FORSCHUNGSZENTRUM,W-7800 FREIBURG,GERMANY

来源：

ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS | 1991年 / 20卷 / 1-4期

关键词：

DISSOCIATION DYNAMICS; IONIZATION;

D O I：

10.1007/BF01543971

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

A reflecting time of flight mass spectrometer (RETOF) is used to study unimolecular and collision induced fragmentation of ammonia cluster ions. Synchrotron radiation from the BESSY electron storage ring is used in a range of photon energies from 9.08 up to 17.7 eV for single photon ionisation of neutral clusters in a supersonic beam. The threshold photoelectron photoion coincidence technique (TPEPICO) is used to define the energy initially deposited into the cluster ions. Metastable unimolecular decay (mu-s range) is studied using the RETOF's capacity for energy analysis. Under collision free conditions the by far most prominent metastable process is the evaporation of one neutral NH3 monomer from protonated clusters (NH3)n-2NH4+. Abundance of homogeneous vs. protonated cluster ions and of metastable fragments are reported as a function of photon energy and cluster size up to n = 10.

引用

页码：193 / 196

页数：4

共 18 条

[1] STUDIES IN HIGH-PRESSURE MASS-SPECTROMETRY .5. THERMODYNAMICS OF SOLVATION REACTIONS NH4+-NH3 [J].

ARSHADI, MR ;

FUTRELL, JH .

JOURNAL OF PHYSICAL CHEMISTRY, 1974, 78 (15) :1482-1486

[2] ELECTRON-BOMBARDMENT FRAGMENTATION OF SIZE SELECTED NH3 CLUSTERS [J].

BUCK, U ;

LAUENSTEIN, C .

JOURNAL OF CHEMICAL PHYSICS, 1990, 92 (07) :4250-4255

[3] MULTIPHOTON IONIZATION OF AMMONIA CLUSTERS AND THE DISSOCIATION DYNAMICS OF PROTONATED CLUSTER IONS [J].

ECHT, O ;

DAO, PD ;

MORGAN, S ;

CASTLEMAN, AW .

JOURNAL OF CHEMICAL PHYSICS, 1985, 82 (09) :4076-4085

[4]

GREER JC, IN PRESS

[5] A THEORETICAL-STUDY OF AMMONIA POLYMERS AND CLUSTER IONS [J].

HIRAO, K ;

FUJIKAWA, T ;

KONISHI, H ;

YAMABE, S .

CHEMICAL PHYSICS LETTERS, 1984, 104 (2-3) :184-190

[6] PHOTOIONISATION STUDIES OF HOMOGENEOUS ARGON AND KRYPTON CLUSTERS USING TPEPICO [J].

KAMKE, W ;

DEVRIES, J ;

KRAUSS, J ;

KAISER, E ;

KAMKE, B ;

HERTEL, IV .

ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS, 1989, 14 (04) :339-351

[7] ON THE PHOTOIONIZATION AND FRAGMENTATION OF AMMONIA CLUSTERS USING TPEPICO [J].

KAMKE, W ;

HERRMANN, R ;

WANG, Z ;

HERTEL, IV .

ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS, 1988, 10 (04) :491-497

[8]

KAMKE W, IN PRESS

[9]

KAMKE W, 1987, PHYSICS CHEM SMALL C

[10] EVAPORATION FROM SMALL PARTICLES [J].

KLOTS, CE .

JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (21) :5864-5868

← 1 2 →