CRITICAL SIZES AGAINST COULOMB DISSOCIATION OF HIGHLY-CHARGED SODIUM CLUSTERS OBTAINED BY ION IMPACT

被引：130

作者：

CHANDEZON, F

GUET, C

HUBER, BA

JALABERT, D

MAUREL, M

MONNAND, E

RISTORI, C

ROCCO, JC

机构：

[1] Commissariat̀ l'Energie Atomique, Laboratoire des Ions, Atomes et Agrégats, Centre d'Etudes Nucléaires de Grenoble, F38054 Grenoble Cedex 9, 17, rue des Martyrs

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.74.3784

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The multiple ionization of alkali-metal clusters by low energy ions is investigated experientially for the first time. Multi-ionized clusters possibly undergoing Coulomb dissociation are formed and detected. Free sodium clusters of a few hundred atoms have been bombarded by different ion beams (H+, O5+, Ar8+) of velocity ranging from 0.5×108 to 2.2×108 cm/s. Critical sizes for stability against charge excess have been deduced for cluster charges up to 6. They are found to depend upon the projectile charge. Observed differences are discussed in terms of temperature effects. © 1995 The American Physical Society.

引用

页码：3784 / 3787

页数：4

共 18 条

[1]

ANDERSEN HH, 1980, STOPPING RANGES IONS, V3

[2] The mechanism of nuclear fission [J].

Bohr, N ;

Wheeler, JA .

PHYSICAL REVIEW, 1939, 56 (05) :426-450

[3] ASYMMETRIC FISSION OF NAN ++ AROUND THE CRITICAL SIZE OF STABILITY [J].

BRECHIGNAC, C ;

CAHUZAC, P ;

CARLIER, F ;

DEFRUTOS, M .

PHYSICAL REVIEW LETTERS, 1990, 64 (24) :2893-2896

[4] DYNAMICS OF UNIMOLECULAR DISSOCIATION OF SODIUM CLUSTER IONS [J].

BRECHIGNAC, C ;

CAHUZAC, P ;

LEYGNIER, J ;

WEINER, J .

JOURNAL OF CHEMICAL PHYSICS, 1989, 90 (03) :1492-1498

[5] DYNAMICS AND ENERGY-RELEASE IN FISSION OF SMALL DOUBLY-CHARGED CLUSTERS [J].

BRECHIGNAC, C ;

CAHUZAC, P ;

CARLIER, F ;

DEFRUTOS, M ;

BARNETT, RN ;

LANDMAN, U .

PHYSICAL REVIEW LETTERS, 1994, 72 (11) :1636-1639

[6]

CHANDEZON F, 1994, REV SCI INSTRUM, V65, P11

[7]

DEHEER WA, 1987, SOLID STATE PHYS, V40, P93

[8] THE PHYSICS OF SIMPLE METAL-CLUSTERS - EXPERIMENTAL ASPECTS AND SIMPLE-MODELS [J].

DEHEER, WA .

REVIEWS OF MODERN PHYSICS, 1993, 65 (03) :611-676

[9]

GROSS M, IN PRESS Z PHYS D

[10] PREPARATION AND PHOTOIONIZATION POTENTIALS OF MOLECULES OF SODIUM, POTASSIUM, AND MIXED ATOMS [J].

HERRMANN, A ;

SCHUMACHER, E ;

WOSTE, L .

JOURNAL OF CHEMICAL PHYSICS, 1978, 68 (05) :2327-2336

← 1 2 →