Welcome to Physics Group
Variable Energy Cyclotron Centre, Kolkata

Experimental Nuclear Physics

Member Profile

Parnika Das
Official Address

Raja Ramanna Research Scholars' Wing

(Room No: 106)

VECC, 1/AF Bidhannagar

Kolkata 700 064


Phone: +91 33 23182381

Fax:  + 91 33 23346871

Parnika Das

Present position

Head, Cryogenic Trap Section

Earlier positions held

Scientific Officer, Bhabha  Atomic Research Centre,1992-1993


PhD (2005) : University of  Jadavpur, INDIA

(Thesis title: Change In Decay Rate Of 7Be In Different Environments And Its Implications On The Solar Neutrino Problem)


M.Tech. (1990) : Indian Institute of Technology, Delhi, INDIA


M. Sc. (1989): Indian Institute of Technology, Kanpur, INDIA


B.Sc. (1987): Miranda House, Delhi University, INDIA 

Research Interests

• Development and Experimental measurements using Cryogenic Penning Ion Trap

• Study of nuclear decay rate change due to environmental effect

• High precision measurement of electron capture decay rate under compression

• Study of electronic environments in solids using Perturbed Angular Co-relation technique

Selected Publications


1.    Observation of large change of 7Be decay rate in Au and Al2O3 and its implications, A. Ray, P. Das, S. K. Saha, S. K. Das, B. Sethi, A. Mookerjee, C. Basu Chaudhuri, G. Pari, Phys. Lett. B 455, 69 (1999).  

2.    Terrestrial 7Be decay rate and 8B solar neutrino flux, P. Das and A. Ray, Phys. Rev. C 71, 025801 (2005). 

3.    Observation of enhanced orbital electron-capture nuclear decay rate in a compact medium, A. Ray, P.Das, S. K. Saha, A. Goswami, A.De, Phys. Lett. B. 679 (2009) 106.

Talks Delivered 


1. Change in decay rate of 7Be in different environments, its implication and possible application

April, 2006, GSI, Darmstadt, GERMANY

Invited talk

1.    Change In Decay Rate Of 7Be In Different Environments And Its Implications On The Solar Neutrino Problem

DAE-BRNS Symposium on Nuclear Physics (2004).

2.    Traps in Nuclear Physics

Expanding horizon of Nuclear Physics, at Mumbai, India ( 2009.)

3.    Development of VECC Cryogenic Penning Ion Trap and some planned experiments

DAE-BRNS Symposium on Atomic, Molecular and Optical Physics