Proceedings of the DAE Symp. on Nucl. Phys. 57 (2012) 872 Available online at www.sympnp.org/proceedings A modular TAS Setup at VECC using BaF 2 detectors G. Mukherjee,* Balaram Dey, S. Mukhopadhyay, Deepak Pandit, Surajit Pal, H. Pai and S.R. Banerjee Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700064, INDIA . * email: gopal@vecc.gov.in Introduction A Total Absorption Spectrometer (TAS) is a setup to measure the total energy of all the  rays emitted in an event. Such a setup is very useful for the measurement of -decay feeding intensity free from pandemonium effect [1]. Recently a modular TAS array has been set up at VECC using 50 BaF 2 detectors. The setup Fig. 1: (Top) The closed configuration and (bottom) two halves of the TAS array are shown. Fig. 1 shows the TAS setup using smaller (3.5x3.5x5 cm 3 ) BaF 2 detectors at VECC [2]. The array consists of two blocks having 25 detectors in each. The detectors in each block were arranged in castle-type geometry. The blocks were brought together for a closed 4 configuration and the source was kept at the middle of the array. The closed configuration of the setup is shown in the top panel of Fig. 1 and the two blocks are shown in the bottom panel. Measurements Fig.2: Raw spectrum of 137 Cs source obtained from a single BaF 2 detector. Fig.3: Sum spectrum of 60 Co source obtained from the TAS array for different multiplicity (M) condition. The array can be used to measure the -decay feeding intensity of radioactive elements. The array was tested using one-, two-, three- and multi- line sources 137 Cs, 60 Co, 22 Na and 152 Eu, respectively. A 137 Cs spectrum obtained from a single individual BaF 2 crystal is shown in Fig. 2.