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S. Chopra
Panjab University, Chandigarh
Accelerator mass spectrometryGeologyChemistrySedimentPelletron
32Publications
5H-index
264Citations
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Publications 36
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#1Amit Kumar (DU: University of Delhi)H-Index: 14
#1Amit Kumar (DU: University of Delhi)H-Index: 27
Last. Sattam Chakraborty (DU: University of Delhi)
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Abstract High-level nuclear waste is usually immobilized into high silica glass matrix for long-term and safe disposal in the geological repository. Performance of glass forms is uncertain for the lack of standardization against a natural analogue. Thus, alteration studies were performed on the impact glass as it is surviving in a natural environment since its inception (570 ka). Further, these results were compared to laboratory induced alteration in the impact glass and Na and Ba borosilicate ...
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#1Y. J. Bhaskar RaoH-Index: 14
Last. E. V. S. S. K. BabuH-Index: 8
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Abstract Conventional beta counting technique based radiocarbon dating facility at Birbal Sahni Institute of Palaeosciences- Lucknow was established in 1974 (Rajagopalan,1978). In 2017–18, BSIP received an upgrade with installation of an Automated Graphitization Equipment (AGE) coupled with an Elemental Analyser, a Carbonate Handling System (CHS) along with an in-line stable isotope mass-spectrometer (IRMS). Using this combo, stable Carbon (C), Nitrogen (N) and Sulfur (S) isotopic measurements c...
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#1Aasif Lone (Anna University)H-Index: 4
#2Hema Achyuthan (Anna University)H-Index: 13
Last. Rajveer SharmaH-Index: 3
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Integrating multiproxy results (geochemistry, mineral magnetism, grain size, and C/N ratio variability supported by 14C AMS dating), obtained from a 1.4-m sediment core retrieved from high-altitude...
1 CitationsSource
#1C. P. Rajendran (Jawaharlal Nehru Centre for Advanced Scientific Research)H-Index: 22
#2Jaishri Sanwal (Jawaharlal Nehru Centre for Advanced Scientific Research)H-Index: 8
Last. S. ChopraH-Index: 5
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2 CitationsSource
#1Pankaj K. GiriH-Index: 2
#2Amritraj MahatoH-Index: 1
Last. S. ChopraH-Index: 5
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#1J. K. PattanaikH-Index: 2
#2Pankaj KumarH-Index: 17
Last. S. ChopraH-Index: 5
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#1Rakesh Saini (Central University, India)H-Index: 2
#2Milap Chand Sharma (JNU: Jawaharlal Nehru University)H-Index: 13
Last. S. ChopraH-Index: 5
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Abstract This study presents glacio-archaeological evidence from the Miyar basin, Lahaul Himalaya, that points towards the former presence of a well settled agricultural society, within a glacier end moraine complex. Three high altitude villages (Tharang, Phundang and Patam, now in ruins) with elaborate irrigation networks thrived within the end moraine complex of Tharang glacier at 3700 m a.s.l. Evidence exists in the form of dilapidated houses which had an organised internal space, chronologic...
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#1Sonia DasH-Index: 1
#2Pankaj KumarH-Index: 17
Last. S. ChopraH-Index: 5
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#1Neha Verma (Panjab University, Chandigarh)H-Index: 1
#2Vishal Sharma (Panjab University, Chandigarh)H-Index: 12
Last. S. ChopraH-Index: 5
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The detection of computer-generated document forgeries has always been a challenging task for forensic document examiners (FDE). With the aim to support the examination processes, Schottky field emission scanning electron microscopy with energy-dispersive X-ray spectroscopy (FE-SEM-EDS) is explored as a recent tool to analyze black toners obtained from laser printers and photocopier machines. Forty samples each from the laser printer and photocopier machines are procured and studied for morpholo...
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