Sunil Ojha

Biographic Data

ID5599566
NAMESunil Ojha
GIVEN NAMESSunil
FAMILY NAMEOjha
SIGNATUREOJHA S
AFFILIATIONSInter-University Accelerator Centre
ORCID0000-0003-2240-6813
VERIFIEDYes
TOTAL WORKS6
TOTAL CITATIONS3
WORKS AS AUTHOR6
WORKS AS EDITOR0
FIRST PUBLICATION YEAR2020
LATEST PUBLICATION YEAR2026
H-INDEX1

  • Radiocarbon based fossil fuel CO 2 observations in megacity Delhi

    Open AccessRajveer Sharma, Ravi Kumar Kunchala et al.ARTICLERadiocarbon2026

    This study employs radiocarbon measurements (Δ 14 C) to detect fossil fuel CO 2 (CO 2ff ) in the megacity Delhi from 2018 to 2022, offering unique insights into fossil fuel emissions. Our measurements reveal varying Δ 14 C values ranging from −56.2‰ to 7.5‰ and CO 2ff values ranging from 0.3 ppm to 25.2 ppm. We observed a distinct seasonality in Δ 14 C and CO 2ff , with higher CO 2ff (lower Δ 14 C) values during winter and post-monsoon seasons an…

  • Spatial Distribution of Fossil Fuel Co 2 in Megacity Delhi Determined Using Radiocarbon Measurements in Peepal ( Ficus Religiosa ) Tree Leaves

    Open AccessRajveer Sharma, Ravi Kumar Kunchala et al.ARTICLERadiocarbon2023References: 44

    The quantification of fossil-fuel derived carbon dioxide (CO 2ff ) emissions is critical for regional carbon budgets. Radiocarbon ( 14 C) is an effective tool to estimate the contribution of CO 2ff to the total atmospheric CO 2 . In the present study, we have determined the spatial distribution of fossil fuel derived CO 2 across Delhi using 14 C measurements in Peepal tree leaves from April 2016 to March 2017 at city scale. Our analysis results s…

  • New Ams 14 C Dates of a Multicultural Archaeological Site From the Paleo-Deltaic Region of West Bengal, India

    Open AccessNabanita Naskar, Kaushik Gangopadhyay et al.ARTICLERadiocarbon2021References: 8

    This study is on the absolute age dating of a multicultural site of Erenda, East Medinipur district, in coastal West Bengal, India. Charcoal samples were collected and measured using the accelerator mass spectrometry (AMS) facility at the Inter-University Accelerator Centre, New Delhi, India. These samples were collected from secured stratigraphic context of two excavated trenches. A careful collection of samples from two trenches provided us wit…

  • Inter-University Accelerator Centre, New Delhi (Iuacd) Radiocarbon Date List Ii

    Open AccessRajveer Sharma, Pankaj Kumar et al.ARTICLERadiocarbon2021Cited by: 1References: 23

    Accelerator mass spectrometry (AMS) activities at the Inter-University Accelerator Centre (IUAC) in New Delhi, India, started with its 15UD Pelletron accelerator and cosmogenic radionuclide (CRN) measurements of 10 Be and 26 Al. Realizing the demand of a radiocarbon ( 14 C) AMS facility in India, a 500kV Pelletron accelerator based AMS system was installed in 2015. This facility was designated with the lab code IUACD for 14 C measurements. 14 C d…

  • Environmental magnetic, Geochemical and Sulfur isotopic imprints of an Indus archaeological site 4MSR from western India (Rajasthan)

    Open AccessShalini Sharma, Amish Kumar et al.ARTICLEQuaternary International2020

  • Inter-University Accelerator Centre, New Delhi (Iuacd) Radiocarbon Date List I

    Open AccessRajveer Sharma, Pankaj Kumar et al.ARTICLERadiocarbon2020Cited by: 2References: 8

    A new facility for radiocarbon dating by accelerator mass spectrometry (AMS) was established in early 2015 at the Inter-University Accelerator Centre in New Delhi, India. The facility uses a 500 kV National Electrostatic Corporation (NEC) Pelletron accelerator for AMS measurements on graphite produced using the automated graphitization equipment (AGE) interfaced with an elemental analyzer and the carbonate handling system (CHS). A precision of be…