Ahmet Çelik
Research Subjects
Research Interests
Ahmet Çelik has a total of 9 co-authors. Here are the top co-authors by number of shared publications:
- Aylin Hacisalihoglu
INFN-Laboratori Nazionali del Sud, Catania, Italy
1 shared publication - Bahadır KOZ
Giresun Üniversitesi
1 shared publication - Cafer Mert Yeşilkanat
Artvin Çoruh Üniversitesi
1 shared publication - Fatih Özkalaycı
Central Research Laboratory, Karadeniz Technical University, 61080 Trabzon, Türkiye
1 shared publication - Kübra Karaoğlu Uzun
Physics/Faculty of Science, Karadeniz Technical Univerity, Trabzon, Turkey
1 shared publication - Necati Çelik
Gumushane university
1 shared publication
Latest Publications
- Open Access
- 12 May 2026
- Published by Elsevier in SSRN Electronic Journal
Long‑term decline of Chernobyl‑derived 137Cs in mosses and lichens from the Eastern Black Sea region of Türkiye
Following the Chernobyl accident, Ordu province in Türkiye’s Eastern Black Sea region received significant 137Cs deposition. Mosses and lichens have been used as bioindicators at 50 sampling points in 1997, 2007, and again in 2025. This study presents the third measurement (2025) and calculates ecological half‑lives for the 2007–2025 period. Samples were collected from the same locations and species, and 137Cs activity was measured by HPGe gamma spectrometry. Detectable 137Cs was found in 14 of 30 moss sites (mean 10.1 Bq kg⁻¹) and 3 of 20 lichen sites (mean 5.2 Bq kg⁻¹). Ecological half‑lives for 2007–2025 averaged 4.4 years for mosses and 4.2 years for lichens, similar to values from 1997–2007. Nearly 39 years after Chernobyl, 137Cs remains detectable at very low levels. The consistent short ecological half‑life confirms that environmental removal continues to dominate over radioactive decay. This 28‑year dataset provides a robust baseline for long‑term radiocaesium monitoring.
- 12 May 2026
- Published by Elsevier in SSRN Electronic Journal
Open AccessLong‑term decline of Chernobyl‑derived 137Cs in mosses and lichens from the Eastern Black Sea region of Türkiye
Following the Chernobyl accident, Ordu province in Türkiye’s Eastern Black Sea region received significant 137Cs deposition. Mosses and lichens have been used as bioindicators at 50 sampling points in 1997, 2007, and again in 2025. This study presents the third measurement (2025) and calculates ecological half‑lives for the 2007–2025 period. Samples were collected from the same locations and species, and 137Cs activity was measured by HPGe gamma spectrometry. Detectable 137Cs was found in 14 of 30 moss sites (mean 10.1 Bq kg⁻¹) and 3 of 20 lichen sites (mean 5.2 Bq kg⁻¹). Ecological half‑lives for 2007–2025 averaged 4.4 years for mosses and 4.2 years for lichens, similar to values from 1997–2007. Nearly 39 years after Chernobyl, 137Cs remains detectable at very low levels. The consistent short ecological half‑life confirms that environmental removal continues to dominate over radioactive decay. This 28‑year dataset provides a robust baseline for long‑term radiocaesium monitoring.