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Laboratory for thermoluminescent dosimetry (TLD)
Jožef Stefan Institute
Jamova 39
SI-1000 Ljubljana
Slovenia

Telephone: +386 1 477 34 76

Fax: +386 1 477 31 51

E-mail: tldlab@ijs.si

Contacts: 

The Laboratory for thermoluminescent dosimetry (TLD) provides established, significant and unique dosimetry services for users of ionising radiation. The TLD is accredited by Slovenian Accrediation  Slovenian Accrediation (accrediation certificate No. LP-022) for doses Hp(10), Hp(0,07), H*(10) and air-kerma. The TLD is empowered by Slovenian Radiation Protection Administration (SRPA) to run the dosimetric services.

 

We have more than 20 years experience in personal and environmental dosimetry and more. With the assistance of our in-house developed TLD system MR200C, which can be classified as an ohmic heating TL measurement system,  we offer quality, fast, reliable and accurate dosimetric services.

 

The TLD system MR200C has been proven to work well for readings of doses of ionising radiation from 5 µSv to 5 Sv. Primarily, the MR200 was designed to read very low doses with uncertainties, below 3%. The MR200 system is fully controlled by a PC in the Windows environment. Every measurement is performed in a clean nitrogen atmosphere. Commercial hardware modules for temperature control and digital input-output were used for measurement and process control. The software was written in the LabView graphic programming language and is used to control the measuring process. The measuring parameters can be easily changed, which makes the MR200 system suitable for experiments with different thermoluminescent materials. For this purpose many different heating programmes can be used with prescribed intervals of preheating and heating. Each time-interval can be set for duration and heating rate. Three basic evaluation procedures of the glow curve can be selected, which are based either on the peak height, integration within a fixed interval, or integration in an adaptable interval, based on a certain fraction of the peak height. Essential data from each measurement are stored in the database. The database was also integrated into the software that controls the measurement. Glow curves are saved and they can be re-evaluated in a separate program for detailed analysis

 

In personal dosimetry we read dosemeters of 450 workers in medical, authoritative, educational and research institutions. In environmental dosimetry we monitor external gamma radiation at 120 sites in Slovenia.

 

Please do not hesitate to request our accurate and reliable dosimetric service

LABORATORY STAFF

 

 

 

 

Telefon

E-mail

Head of the laboratory

Ph.D. Benjamin Zorko

+386 1 477 34 16

e-mail

Technical head of the laboratory

Boštjan Črnič, B.Sc

+386 1 477 34 76

e-mail

Dosimetrist

Sandi Gobec

+386 1 477 34 76

e-mail

Literature

List of thesis that are related to TLD

 

1.      M. Mihelič, Termoluminiscentni dozni merilnik s fotodiodo, master of science thesis, University of Ljubljana, Ljubljana 1982.

2.      Drčar T., Uravnavanje odziva termoluminscentnih dozimetrov z energijskim filtriranjem, diploma thesis, University of Ljubljana, Ljubljana 1984.

3.      Jezeršek D., Umeritev merilnega sistema za termoluminscenčno dozimetrijo, diplomsa thesis, University of Ljubljana, Ljubljana 2002.

4.      Črnič B., Merjenje doze v sevalnem polju točkastega vira s termoluminscenčnimi dozimetri, diploma thesis, University of Ljubljana, Ljubljana 2006.

5.      Miklavžina I., Merjenje fotonskih doz v okolju, diploma thesis, University of Ljubljana, Ljubljana 2007.

6.      Miljanic, S., Knezevic, Z., Stuhec, M., Ranogajec-Komor, M., Krpan, K. and Vekic, B. Energy dependence of new thermoluminescent detectors in terms of Hp(10) values. Radiat. Prot. Dosim. 106(3), 253-256 (2003).[Abstract]

7.      Mihelic, M., Miklavzic, U., Rupnik, Z. and Satalic, P. Thermoluminescent analizator MR-200. IJS DP-3924, Ljubljana (1985).

8.      Jezersek, D. validation of measurement system for thermoluminescent dosimetry. Diploma thesis, University of Ljubljana, Ljubljana (2002).

9.      International standards IEC. Thermoluminescence dosimetry systems for personal and environmental monitoring. IEC 1066, (IEC: Geneva) (1991).

10.  Miljanic, S., Ranogajec-Komor, M., Knezevic, Z. and Vekic, Main dosimetric characteristics of some tissue-equivalent TL detectors. B. Radiat. Prot. Dosim. 100(1-4), 437-442 (2002).[Abstract]

11.  Rupnik, Z., Miklavzic, U., Diallo, B. and Mihelic, M. Control and data processing of thermoluminescent analyzer. V: NI Days 2001. In: Proceedings of a Technical Symposium on Measurement and Automation. The Measurement Network. Milano: VNU Business Publications, National Instruments Italia, pp. 59-60 (2001).

12.  Diallo, B., Miklavzic, U., Mihelic, M. and Rupnik, Z. Dose Evaluation in personal TL dosimetry by a database management system. Radiat. Prot. Dosim. 34, 165-166 (1990).[Abstract]

13.  Drcar, T. Compensation of response of thermoluminescent dosemeters by energy filtration. Diploma thesis, University of Ljubljana, Ljubljana (1984).

14.  Drazic, G., Miklavzic, U. and Mihelic, The Influence of TL glow curve evaluation algorithms on the reprodicibility of dosemeter readings. M. Radiat. Prot. Dosim. 17, 343 (1986).[Abstract]

15.  ZORKO, Benjamin, MILJANIĆ, Saveta, VEKIĆ, Branko, ŠTUHEC, Matjaž, GOBEC, Sandi, RANOGAJEC-KOMOR, Maria. Intercomparison of dosimetry systems based on CaF[sub]2 : Mn TL detectors. Radiat. prot. dosim., 2006, vol. 119, no. 1-4, str. 300-305. [COBISS.SI-ID 20128295]

16.  ŠTUHEC, Matjaž, ZORKO, Benjamin, VEKIĆ, Branko, MILJANIĆ, Saveta, BASIĆ, B., BAN, R. Harmonization of individual dosimetry quality control within metrology system of a small country. Radiat. prot. dosim., 2007, issues 1-4, vol. 125, str. 117-120. http://dx.doi.org/10.1093/rpd/ncm198. [COBISS.SI-ID 21503015]
tipologija 1.08 -> 1.01

17.  MILJANIĆ, Saveta, ZORKO, Benjamin, GREGORI, Beatriz, KNEŽEVIĆ, Željka. TL detectors for gamma ray dose measurements in criticality accidents. Radiat. prot. dosim., 2007, issues 1-4, vol. 125, str. 318-322. [COBISS.SI-ID 20629287]
tipologija 1.08 -> 1.01

18.  ŠTUHEC, Matjaž, ZORKO, Benjamin, MITIĆ, Dragan, MILJANIĆ, Saveta, RANOGAJEC-KOMOR, Maria. Quality assurance of environmental gamma radiation monitoring in Slovenia. Radiat. prot. dosim., 2006, vol. 121, no. 2, str. 191-194. [COBISS.SI-ID 20473127]

19.  JEZERŠEK, David, MIHELIČ, Matjaž, RUPNIK, Zdravko, ŠTUHEC, Matjaž, ZORKO, Benjamin. The new IJS MR200 TLD measuring system. V: KRAJCAR BRONIĆ, Ines (ur.), MILJANIĆ, Saveta (ur.), OBELIĆ, Bogomil (ur.). Zbornik radova V. simpozija hrvatskog društva za zaščitu od zračenja [s međunarodnim sudjelovanjem, Stubičke Toplice, Hrvatska, 9.-11. travnja 2003]. Zagreb: HDZZ-CRPA, 2003, str. 121-124. [COBISS.SI-ID 17835559]

20.  ZORKO, Benjamin, JEZERŠEK, David, ŠTUHEC, Matjaž, GOBEC, Sandi. Energy dependance of TL dosemeters using CaF[sub]2 : Mn pellets. V: GARAJ VRHOVAC, Verica (ur.), KOPJAR, Nevenka (ur.), MILJANIĆ, Saveta (ur.). Zbornik radova VI. simpozija Hrvatskog društva za zaštitu od zračenja s međunarodnim sudjelovanjem, Stubiške Toplice, Hrvatska, 18.-20. travnja 2005. Zagreb: HDZZ-CRPA, 2005, str. 97-104. [COBISS.SI-ID 19002663]

21.  ZORKO, Benjamin. TLD system upgraded to measure doses in energy mixed-fields. V: Association, IRPA 11, 23-28 May 2004, Madrid, Spain. Abstracts. [S. l.]: IRPA, 2004, str. 151. [COBISS.SI-ID 20128807]

22.  ZORKO, Benjamin, LAMPE, Ž., ČRNIČ, Boštjan, MIKLAVŽINA, I., GOBEC, Sandi. Validation of the TLD IJS MR 200C (2) measuring system, (IJS delovno poročilo, 9520). 2007. [COBISS.SI-ID 20486183]

23.  ZORKO, Benjamin, GOBEC, Sandi, ČRNIČ, Boštjan, JEZERŠEK, David, MIHELIČ, Matjaž, ŠTUHEC, Matjaž. Validation of the TLD IJS MR 200C (3) measuring system, (IJS delovno poročilo, 9519). 2007. [COBISS.SI-ID 20486439]

 

 

 

 

 

General
TLD – Thermoluminescence dosimetry