Naslov
Periodičnosti u okolišnoj radioaktivnosti u Zagrebu u razdoblju 1985-2011.
(Periodicities in the environmental radioactivity in Zagreb between 1985 and 2011)

Autori
Babić, Dinko ; Senčar, Jasminka ; Petrinec, Branko ; Marović, Gordana ; Bituh, Tomislav ; Skoko, Božena

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Zbornik radova IX. simpozija Hrvatskog društva za zaštitu od zračenja / Knežević, Željka ; Majer, Marija ; Krajcar Bronić, Ines - Zagreb : Hrvatsko društvo za zaštitu od zračenja, 2013, 181-186

ISBN
978-953-96133-8-7

Skup
IX. simpozij Hrvatskog društva za zaštitu od zračenja s međunarodnim sudjelovanjem

Mjesto i datum
Krk, Hrvatska, 10.04.2013. - 12.04.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
brzina doze; periodično ponašanje; 7Be
(dose rate; periodic behaviour; 7Be)

Sažetak
Continuous measurements of the environmental dose rate D at the Institute for medical research and occupational health in Zagreb have resulted in a database containing daily values of D between October 23, 1985, and December 31, 2011. Apart from the appreciable increase in the time of the Chernobyl accident, D was always constant and amounted to 30-35 pGy/s. Fourier transform of D as a function of time reveals a number of discernible periodicities hidden in the noise. The corresponding periods are 6 months (m), 9.3 m, 12 m, 13.7 m, 15.7 m, 20 m, 31 m, and 39 m. Two of the periods (6 m and 12 m) can be explained by seasonal atmospheric effects, whereas the other periods agree well with periods in solar activity. This can be linked to the nucleosynthesis of 7Be in the atmosphere under the influence of cosmic rays.

Izvorni jezik
Hrvatski

Znanstvena područja
Fizika, Javno zdravstvo i zdravstvena zaštita

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