TY - JOUR
T1 - Deconvolution study on the glow curve structure of LiF:Mg,Ti and LiF:Mg,Cu,P thermoluminescent detectors exposed to 1H, 4He and 12C ion beams
AU - Parisi, Alessio
AU - Van Hoey, Olivier
AU - Mégret, Patrice
AU - Vanhavere, Filip
N1 - Score=10
PY - 2017/7/12
Y1 - 2017/7/12
N2 - Lithium fluoride represents the most frequently used base material for thermoluminescent detectors. The
glow curve of these detectors is composed of a series of peaks which intensities strongly depend on the
given dose, the type and energy of the impinging radiation, the concentration of dopants in the crystal
and the lithium isotopic concentration.
In this work, 6LiF:Mg,Ti, 7LiF:Mg,Ti, 6LiF:Mg,Cu,P and 7LiF:Mg,Cu,P detectors were exposed to calibrated
hydrogen, helium and carbon ion beams in order to investigate the change of the structure of the different
peaks composing the glow curves of these materials and their relative luminescence efficiency. In order
to resolve the different peak contributions, computer assisted deconvolution of the glow curve was performed
and the used sets of parameters (activation energy E and temperature at peak maximum Tmax) are
presented.
In the case of LiF:Mg,Ti detectors, the low temperature peaks and the main peak are characterized by a
general efficiency decrease with the increase of the LET of the incident particle. No remarkable differences
were found between detectors enriched with 6Li or 7Li. On the other hand, differences in the structure
of the high temperature peaks between the two lithium isotopic compositions were found and
discussed. Regarding LiF:Mg,Cu,P detectors, each peak shows a general monotonously decreasing relative
efficiency with the increase of LET. In this case, a similar LET dependence was found between 6Li and 7Li
based detectors. Furthermore, unusual efficiencies greater than 1 for the low temperature peaks of LiF:
Mg,Cu,P exposed to low LET particle were observed.
AB - Lithium fluoride represents the most frequently used base material for thermoluminescent detectors. The
glow curve of these detectors is composed of a series of peaks which intensities strongly depend on the
given dose, the type and energy of the impinging radiation, the concentration of dopants in the crystal
and the lithium isotopic concentration.
In this work, 6LiF:Mg,Ti, 7LiF:Mg,Ti, 6LiF:Mg,Cu,P and 7LiF:Mg,Cu,P detectors were exposed to calibrated
hydrogen, helium and carbon ion beams in order to investigate the change of the structure of the different
peaks composing the glow curves of these materials and their relative luminescence efficiency. In order
to resolve the different peak contributions, computer assisted deconvolution of the glow curve was performed
and the used sets of parameters (activation energy E and temperature at peak maximum Tmax) are
presented.
In the case of LiF:Mg,Ti detectors, the low temperature peaks and the main peak are characterized by a
general efficiency decrease with the increase of the LET of the incident particle. No remarkable differences
were found between detectors enriched with 6Li or 7Li. On the other hand, differences in the structure
of the high temperature peaks between the two lithium isotopic compositions were found and
discussed. Regarding LiF:Mg,Cu,P detectors, each peak shows a general monotonously decreasing relative
efficiency with the increase of LET. In this case, a similar LET dependence was found between 6Li and 7Li
based detectors. Furthermore, unusual efficiencies greater than 1 for the low temperature peaks of LiF:
Mg,Cu,P exposed to low LET particle were observed.
KW - LiF:Mg,Ti
KW - LiF:Mg,Cu,P
KW - TLD
KW - Deconvolution
KW - Efficiency
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/25543906
U2 - 10.1016/j.nimb.2017.07.004
DO - 10.1016/j.nimb.2017.07.004
M3 - Article
SN - 0168-583X
VL - 407
SP - 222
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
ER -