Study of heavy-ion induced modifications in BaF2 and LaF 3 single crystals

A. S. El-Said; M. Cranney; N. Ishikawa; A. Iwase; R. Neumann; K. Schwartz; M. Toulemonde; C. Trautmann

doi:10.1016/j.nimb.2003.12.057

Study of heavy-ion induced modifications in BaF₂ and LaF ₃ single crystals

A. S. El-Said, M. Cranney, N. Ishikawa, A. Iwase, R. Neumann^*, K. Schwartz, M. Toulemonde, C. Trautmann

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

45 Scopus citations

Abstract

BaF₂ and LaF₃ single crystals were irradiated with different ions from Ne to U having energies between 1.4 and 13.3 MeV/u and were subsequently analyzed with scanning force microscopy (SFM), optical spectroscopy and surface profilometry. Similar to numerous other ionic crystals, ion-induced hillocks were observed by SFM, the mean size on the nanometer scale depending on the electronic energy loss. BaF₂ shows optical color-center absorption spectra, which consist of broad bands ascribed to F-center aggregates, whereas LaF₃ does not exhibit any specific absorption bands. Depending on the beam parameters (energy, fluence, etc.), the irradiation of both crystals leads to more or less pronounced out-of-plane swelling. In order to study the thermal behaviour of ion-induced modifications, isochronal annealing has been performed. Both crystals show a decrease of the relative step height and the areal density of the hillocks with increasing temperature.

Original language	English
Pages (from-to)	492-497
Number of pages	6
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	218
Issue number	1-4
DOIs	https://doi.org/10.1016/j.nimb.2003.12.057
State	Published - Jun 2004
Externally published	Yes

Bibliographical note

Funding Information:
The authors are grateful to Dr. Tadashi Kambara of the Institute of Physical and Chemical Research (RIKEN), Wako, Japan, for performing irradiation with Ta ions at the RIKEN ring cyclotron. A.S. El-Said would like to thank the Deutscher Akademischer Austauschdienst (DAAD) for providing him with a scholarship. Financial support by the European Commission under contract EC-HPRT-CT-1999-00001 is also gratefully acknowledged.

Keywords

Color centers
SFM
Swelling
Thermal annealing

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

Access to Document

10.1016/j.nimb.2003.12.057

Cite this

@article{d38e083f711947c7aa8254198e4891a2,

title = "Study of heavy-ion induced modifications in BaF2 and LaF 3 single crystals",

abstract = "BaF2 and LaF3 single crystals were irradiated with different ions from Ne to U having energies between 1.4 and 13.3 MeV/u and were subsequently analyzed with scanning force microscopy (SFM), optical spectroscopy and surface profilometry. Similar to numerous other ionic crystals, ion-induced hillocks were observed by SFM, the mean size on the nanometer scale depending on the electronic energy loss. BaF2 shows optical color-center absorption spectra, which consist of broad bands ascribed to F-center aggregates, whereas LaF3 does not exhibit any specific absorption bands. Depending on the beam parameters (energy, fluence, etc.), the irradiation of both crystals leads to more or less pronounced out-of-plane swelling. In order to study the thermal behaviour of ion-induced modifications, isochronal annealing has been performed. Both crystals show a decrease of the relative step height and the areal density of the hillocks with increasing temperature.",

keywords = "Color centers, SFM, Swelling, Thermal annealing",

author = "El-Said, \{A. S.\} and M. Cranney and N. Ishikawa and A. Iwase and R. Neumann and K. Schwartz and M. Toulemonde and C. Trautmann",

note = "Funding Information: The authors are grateful to Dr. Tadashi Kambara of the Institute of Physical and Chemical Research (RIKEN), Wako, Japan, for performing irradiation with Ta ions at the RIKEN ring cyclotron. A.S. El-Said would like to thank the Deutscher Akademischer Austauschdienst (DAAD) for providing him with a scholarship. Financial support by the European Commission under contract EC-HPRT-CT-1999-00001 is also gratefully acknowledged. ",

year = "2004",

month = jun,

doi = "10.1016/j.nimb.2003.12.057",

language = "English",

volume = "218",

pages = "492--497",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

issn = "0168-583X",

number = "1-4",

}

TY - JOUR

T1 - Study of heavy-ion induced modifications in BaF2 and LaF 3 single crystals

AU - El-Said, A. S.

AU - Cranney, M.

AU - Ishikawa, N.

AU - Iwase, A.

AU - Neumann, R.

AU - Schwartz, K.

AU - Toulemonde, M.

AU - Trautmann, C.

N1 - Funding Information: The authors are grateful to Dr. Tadashi Kambara of the Institute of Physical and Chemical Research (RIKEN), Wako, Japan, for performing irradiation with Ta ions at the RIKEN ring cyclotron. A.S. El-Said would like to thank the Deutscher Akademischer Austauschdienst (DAAD) for providing him with a scholarship. Financial support by the European Commission under contract EC-HPRT-CT-1999-00001 is also gratefully acknowledged.

PY - 2004/6

Y1 - 2004/6

N2 - BaF2 and LaF3 single crystals were irradiated with different ions from Ne to U having energies between 1.4 and 13.3 MeV/u and were subsequently analyzed with scanning force microscopy (SFM), optical spectroscopy and surface profilometry. Similar to numerous other ionic crystals, ion-induced hillocks were observed by SFM, the mean size on the nanometer scale depending on the electronic energy loss. BaF2 shows optical color-center absorption spectra, which consist of broad bands ascribed to F-center aggregates, whereas LaF3 does not exhibit any specific absorption bands. Depending on the beam parameters (energy, fluence, etc.), the irradiation of both crystals leads to more or less pronounced out-of-plane swelling. In order to study the thermal behaviour of ion-induced modifications, isochronal annealing has been performed. Both crystals show a decrease of the relative step height and the areal density of the hillocks with increasing temperature.

AB - BaF2 and LaF3 single crystals were irradiated with different ions from Ne to U having energies between 1.4 and 13.3 MeV/u and were subsequently analyzed with scanning force microscopy (SFM), optical spectroscopy and surface profilometry. Similar to numerous other ionic crystals, ion-induced hillocks were observed by SFM, the mean size on the nanometer scale depending on the electronic energy loss. BaF2 shows optical color-center absorption spectra, which consist of broad bands ascribed to F-center aggregates, whereas LaF3 does not exhibit any specific absorption bands. Depending on the beam parameters (energy, fluence, etc.), the irradiation of both crystals leads to more or less pronounced out-of-plane swelling. In order to study the thermal behaviour of ion-induced modifications, isochronal annealing has been performed. Both crystals show a decrease of the relative step height and the areal density of the hillocks with increasing temperature.

KW - Color centers

KW - SFM

KW - Swelling

KW - Thermal annealing

UR - https://www.scopus.com/pages/publications/2342541747

U2 - 10.1016/j.nimb.2003.12.057

DO - 10.1016/j.nimb.2003.12.057

M3 - Conference article

AN - SCOPUS:2342541747

SN - 0168-583X

VL - 218

SP - 492

EP - 497

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

IS - 1-4

ER -