Gamma Coincidence

Measurement of coincident gamma rays using two spectrometers

Coincidence Measurements

Our dual parameter MCA is capable of interpreting the shaper outputs from GammaSpec1K units in order to make a modular coincidence setup.

Main Features of the GammaSpec coincidence unit

2 MeV full scale range for each spectrometer

Dual MCA with 0-3.3V shaper inputs

500nS coincidence window. Configurable via software

<80keV FWHM @ 1332KeV centroid from 60Co

Additional 1024 bin MCA integrated in each spectrometer.

Fully USB powered units

Fully featured Python software supplied open-source.

The gammaspec is a highly compact portable spectrometer which is fully USB Powered.


Title Journal Author(s)

Indigenously developed gamma spectrometer

Proceedings of the DAE Symp. on Nucl. Phys. 63 (2018) 1072

Jithin B.P. and O.S.K.S. Sastri

Novel coincidence setup using indigenously developed portable USB gamma spectrometer and associated analysis software

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Jithin B.P. and O.S.K.S. Sastri

Gated MCA technique for demonstration of coincidence phenomena with a set of indigenously developed gamma spectrometers

Recent Issues in Nuclear and Particle Physics (RINP2)

Jithin B.P. and O.S.K.S. Sastri

Compact dual-parameter MCA for γ−γ Coincidence Measurements

Proceedings of the DAE Symp. on Nucl. Phys. 64 (2019)

Jithin B.P. and O.S.K.S. Sastri

Background Gamma Radiation Surveying in the Indian Peninsula with a Portable USB Spectrometer

Proceedings of the DAE Symp. on Nucl. Phys. 64 (2019)

Jithin B.P. and O.S.K.S. Sastri

Gamma Spectra of Non-Enriched Thorium Sources using PIN Photodiode and PMT based Detectors

Physics Education-IAPT Volume 38: No 1. Jan-Mar 2020

Jithin B.P. , Swapna Gora
V.V.V. Satyanarayana , O.S.K.S Sastri & Ajith B.P.


Spectrum from 22-Na

Positron annihilation spectrum from 22-Sodium

Positrons emitted from the decay of 22-Na annihilate and give rise to 511keV which move in opposite directions. When the spectrometers are placed linearly, these can be detected as coincident events, and used to filter out the 1275keV photons emitted by the daughter Ne.

More Information

Software Page


Open-source software, CNSpec, is supplied with the instrument. link

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