Charge dependent energy loss of 60 MeV 58Niq+ ions in argon gas

被引：4

作者：

Schmelmer, O ^{[1
]}

Dollinger, G ^{[1
]}

Frey, CM ^{[1
]}

Bergmaier, A ^{[1
]}

Karsch, S ^{[1
]}

机构：

[1] Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1998年 / 146卷 / 1-4期

关键词：

energy loss; charge state; charge fractions; screening;

D O I：

10.1016/S0168-583X(98)90484-0

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Energy loss and charge fractions of 60 MeV Ni-58(q+) ions in argon gas (0.1-16 mu g/cm(2)) have been measured by means of a Q3D magnetic spectrograph in dependence of the incident and analysed charge state of the ions. The measurements show energy loss phenomena at argon gas thicknesses where the charge state distribution is not in equilibrium. For the charge state q = 8+ the stopping power at small target thickness deviates significantly from the value at larger gas thickness. The stopping power of q = 18+ is almost the same as for q = 14+ but energy loss shows a step at about 2 mu g/cm(2). The deviation of the stopping power at small gas thickness is a combination of two effects. The evolution of the ion's mean charge with increasing target thickness and a selection of impact parameter in collisions between projectiles and gas atoms. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：95 / 100

页数：6

共 13 条

[1] Bethe H, 1930, ANN PHYS-BERLIN, V5, P325
[2] HIGH-RESOLUTION DEPTH PROFILING OF LIGHT-ELEMENTS
DOLLINGER, G
FAESTERMANN, T
MAIERKOMOR, P
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1992, 64 (1-4) : 422 - 427
[3] CHARGE-STATE DEPENDENCE OF THE STOPPING POWER OF 1 MEV/A NI-58-IONS IN THIN CARBON FOILS
FREY, CM
DOLLINGER, G
BERGMAIER, A
FAESTERMANN, T
MAIERKOMOR, P
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1995, 99 (1-4) : 205 - 209
[4] Hanke C. C., 1970, Kongelige Danske Videnskabernes Selskab, Matematisk-Fysiske Meddelelser, V38, P3
[5] ENERGY DISSIPATION BY IONS IN KEV REGION
LINDHARD, J
SCHARFF, M
[J]. PHYSICAL REVIEW, 1961, 124 (01): : 128 - +
[6] Loebner K.E, 1970, ATOM DATA NUCL DATA, V7, P495
[7] ION OPTICAL PROPERTIES OF MUNICH Q3D-SPECTROGRAPH INVESTIGATED BY MEANS OF A SPECIAL EXPERIMENTAL RAY TRACING METHOD
LOFFLER, M
SCHEERER, HJ
VONACH, H
[J]. NUCLEAR INSTRUMENTS & METHODS, 1973, 111 (01): : 1 - 12
[8] SEMIEMPIRICAL FORMULAS FOR HEAVY-ION STRIPPING DATA
SAYER, RO
[J]. REVUE DE PHYSIQUE APPLIQUEE, 1977, 12 (10): : 1543 - 1546
[9] Energy straggling of 60 MeV 58Niq+ ions in thin carbon foils and gases
Schmelmer, O
Dollinger, G
Frey, CM
Bergmaier, A
Karsch, S
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1998, 145 (03) : 261 - 270
[10] EQUILIBRIUM CHARGE STATE DISTRIBUTIONS OF IONS (Z1-GREATER-THAN-OR-EQUAL-TO-4) AFTER PASSAGE THROUGH FOILS - COMPILATION OF DATA AFTER 1972
SHIMA, K
MIKUMO, T
TAWARA, H
[J]. ATOMIC DATA AND NUCLEAR DATA TABLES, 1986, 34 (03) : 357 - 391

← 1 2 →