Improvement of the dosimetric properties of chemical-vapor-deposited diamond films by neutron irradiation

Mara Bruzzi, David Menichelli, Silvia Pini, Marta Bucciolini, J. Molnár, A. Fenyvesi

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The performance of chemical-vapor-deposited (CVD) diamond films as on-line dosimeters has been substantially improved after irradiation with fast neutrons up to a fluence of 5×1014n/cm2. This is correlated to a decrease of more than one order of magnitude in the concentration of deep levels with activation energy in the range 0.9-1.4 eV, as observed by thermally stimulated current and photoinduced current transient spectroscopy. As a consequence, a fast and reproducible dynamic response is observed during irradiation with a 6 MV photon beam from linear accelerator and with a Co 60 source. A quasilinear dependence of the current on the dose rate is obtained in the range of interest for clinical applications (0.1-10 Gy/min). The resulting sensitivity is definitely higher than that of standard ionization chambers, and compares favorably with those of standard silicon dosimeters and of best-quality natural and CVD diamond devices.

Original languageEnglish
Pages (from-to)298-300
Number of pages3
JournalApplied Physics Letters
Volume81
Issue number2
DOIs
Publication statusPublished - Jul 8 2002

Fingerprint

neutron irradiation
diamond films
vapors
dosimeters
irradiation
photon beams
linear accelerators
ionization chambers
fast neutrons
dynamic response
fluence
diamonds
activation energy
dosage
sensitivity
silicon
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Improvement of the dosimetric properties of chemical-vapor-deposited diamond films by neutron irradiation. / Bruzzi, Mara; Menichelli, David; Pini, Silvia; Bucciolini, Marta; Molnár, J.; Fenyvesi, A.

In: Applied Physics Letters, Vol. 81, No. 2, 08.07.2002, p. 298-300.

Research output: Contribution to journalArticle

Bruzzi, Mara ; Menichelli, David ; Pini, Silvia ; Bucciolini, Marta ; Molnár, J. ; Fenyvesi, A. / Improvement of the dosimetric properties of chemical-vapor-deposited diamond films by neutron irradiation. In: Applied Physics Letters. 2002 ; Vol. 81, No. 2. pp. 298-300.
@article{8fd6f869494744828f7fac0f8767fd85,
title = "Improvement of the dosimetric properties of chemical-vapor-deposited diamond films by neutron irradiation",
abstract = "The performance of chemical-vapor-deposited (CVD) diamond films as on-line dosimeters has been substantially improved after irradiation with fast neutrons up to a fluence of 5×1014n/cm2. This is correlated to a decrease of more than one order of magnitude in the concentration of deep levels with activation energy in the range 0.9-1.4 eV, as observed by thermally stimulated current and photoinduced current transient spectroscopy. As a consequence, a fast and reproducible dynamic response is observed during irradiation with a 6 MV photon beam from linear accelerator and with a Co 60 source. A quasilinear dependence of the current on the dose rate is obtained in the range of interest for clinical applications (0.1-10 Gy/min). The resulting sensitivity is definitely higher than that of standard ionization chambers, and compares favorably with those of standard silicon dosimeters and of best-quality natural and CVD diamond devices.",
author = "Mara Bruzzi and David Menichelli and Silvia Pini and Marta Bucciolini and J. Moln{\'a}r and A. Fenyvesi",
year = "2002",
month = "7",
day = "8",
doi = "10.1063/1.1491014",
language = "English",
volume = "81",
pages = "298--300",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "2",

}

TY - JOUR

T1 - Improvement of the dosimetric properties of chemical-vapor-deposited diamond films by neutron irradiation

AU - Bruzzi, Mara

AU - Menichelli, David

AU - Pini, Silvia

AU - Bucciolini, Marta

AU - Molnár, J.

AU - Fenyvesi, A.

PY - 2002/7/8

Y1 - 2002/7/8

N2 - The performance of chemical-vapor-deposited (CVD) diamond films as on-line dosimeters has been substantially improved after irradiation with fast neutrons up to a fluence of 5×1014n/cm2. This is correlated to a decrease of more than one order of magnitude in the concentration of deep levels with activation energy in the range 0.9-1.4 eV, as observed by thermally stimulated current and photoinduced current transient spectroscopy. As a consequence, a fast and reproducible dynamic response is observed during irradiation with a 6 MV photon beam from linear accelerator and with a Co 60 source. A quasilinear dependence of the current on the dose rate is obtained in the range of interest for clinical applications (0.1-10 Gy/min). The resulting sensitivity is definitely higher than that of standard ionization chambers, and compares favorably with those of standard silicon dosimeters and of best-quality natural and CVD diamond devices.

AB - The performance of chemical-vapor-deposited (CVD) diamond films as on-line dosimeters has been substantially improved after irradiation with fast neutrons up to a fluence of 5×1014n/cm2. This is correlated to a decrease of more than one order of magnitude in the concentration of deep levels with activation energy in the range 0.9-1.4 eV, as observed by thermally stimulated current and photoinduced current transient spectroscopy. As a consequence, a fast and reproducible dynamic response is observed during irradiation with a 6 MV photon beam from linear accelerator and with a Co 60 source. A quasilinear dependence of the current on the dose rate is obtained in the range of interest for clinical applications (0.1-10 Gy/min). The resulting sensitivity is definitely higher than that of standard ionization chambers, and compares favorably with those of standard silicon dosimeters and of best-quality natural and CVD diamond devices.

UR - http://www.scopus.com/inward/record.url?scp=79955991269&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79955991269&partnerID=8YFLogxK

U2 - 10.1063/1.1491014

DO - 10.1063/1.1491014

M3 - Article

AN - SCOPUS:79955991269

VL - 81

SP - 298

EP - 300

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 2

ER -