Organic reaction mechanisms
High-energy radiation induced processes
Photochemical processes
Processes in photosynthesis and vision
Action of antioxidants
Polymerization processes
Homogeneous catal
Lipid peroxidation processes
Health disorders like diabetes, arthritis
Pulse radiolysis is an excellent technique to
generate both oxidizing and reducing radicals of choice in known
yields in dilute aqueous solutions - the usual solubility limit of
organic and biomolecules- can be easily employed. Thus, this
technique is ideally suited to investigate the kinetics and
absorption spectra of the transients. The
pulse radiolysis facility at BARC has significantly contributed to
radiation chemistry and has acquired both national and international
recognition. In order to give an impetus to research in this area and
to cater to the needs of researchers from the Universities, BARC and
other national institutes, NCFRR was established at the University of
Pune campus on an initiative from Professor B. S. M. Rao with a
copious financial grant from BRNS-DAE, Government of India. During
the first phase of the programme, a pulse radiolysis facility has
been installed. Currently the facility is operational in the time
domain of nanoseconds (10-9) to milliseconds. The facility is open to
users from various University Departments, National Institutions, and
other laboratories. Hon'ble Shri
Prithviraj Chavan, Minister of State in PMO, Government of India,
inaugurated NCFRR on 26th June 2005.
Parameters |
Specification |
Electron beam energy Peak beam current @ 10 ns Peak beam current @ 3 μs Beam diameter at exit window Jitter in pulse Pulse rate (Mains locked option) Dose due to dark current Pulse to pulse reproducibility Energy spread Exit window material Modes of Operation a. Single shot b. Multishots c. Preset beam pulses Pulse width – 10 ns to 3 μs Pre-trigger delay Sequential delay generator |
7 ± 0.5 MeV ≥1 A at 10 ns 0.115 A 2 ± 0.5 mm ± 200ps 50 to 200 pps in 12.5 pps steps < 1 % of beam current ± 1 % ± 0.5 MeV Titanium
50 to 200 pps 10 to 250 pulses in steps of 10 pulses 10, 20, 50, 100, 200, 400 ns & 3 μs 10 μs, 100 μs, 1 ms. Delay for Shutter & Oscilloscope |
Parameters |
Specification |
1. Lamp
2. Monochromator
3. PMT
4. PMT Power supply
5. Digitizer
6. Software
|
Cermax 175W parallel lamp Spectral range 200 – 1600 nm CVI 110mm, Ruled gratings, 1200lines/mm Spectral range 200 – 750 nm Hamamatsu R-7400U - 04 Spectral range 185 – 850 nm Rise time : 0.78 nsec
Programmable, -1000V.
TDS 3032B Bandwidth: 300 MHz Sampling rate 2.5 Gs/sec
Software is supplied as an executable code in the form of compiled Lab VIEW application. The spectrometer software allows for full computer controlled data acquisition with PMT including single shot & multi-shot Kinetics, time resolved Spectra. Off-line Analysis software allows extraction of Kinetic and Spectral information. |
Time Resolved Fluorescence
Spectrometer:
Recently Jobin-Yvon-
IBH time resolved fluorescence spectrometer has been installed in the
centre. This spectrometer uses nanosecond LED' s (Currently 389, 452
and 584 nm). The fluorescence lifetimes are measured by time
correlated single photon counting method. Lifetimes in the time
scales of 500 picoseconds to 1 microsecond are measured.
For
further information, please contact:
Dr.
Avinash S. Kumbhar,
Project Coordinator,
NCFRR, Department of Chemistry,
University of Pune,
Pune-411007.
e-mail:
askum@chem.unipune.ernet.in
Telephone:
91-020-25601371
Mobile:9890607871
Fax: 91-020-25691728