S L KESHAVA, K GOPALA* and PVENKATARAMAIAH⁺

Department of Radiation Physics, Kidwai Memorial Institute of Oncology, Hosur Road, Bangalore 560 029, India

* Department of Studies in Physics, Manasagangothri, University of Mysore, Mysore 570 006, India

⁺ Kuvempu University, Shankaraghatta, Shimoga District 577 451, India

Email: root@kidwai.kar.nic.in

Abstract.

Several measurements of decay energy using the inner Bremsstrahlung spectrum (IB) due to radiative electron capture in ⁵⁵Fe has been made. But the results are not uniform. Hence another attempt has been made at the same. Experimental data was obtained with a 4.445 cm. dia ´ 5.08 cm thick NaI (Tl) detector. It was subjected to suitable statistical treatment and various corrections using Liden and Starfelt procedure. The corrected spectrum agrees well with the Glauber and Martin theory for 1s electron capture beyond 100 keV. From the Jauch plot, the decay energy of 232.36 ±0.64 keV was obtained.

Keywords: Beta decay; radiative electron capture; inner Bremsstrahlung.

Pacs Nos. 23.40.-s; 21.10.Ft; 27.60.+j