Exotic decay in Ba isotopes via ¹²C emission

K P SANTHOSH and ANTONY JOSEPH

Department of Physics, Calicut University, Calicut 673 635, India

Abstract.

Considering Coulomb and proximity potentials as barriers, we have calculated the half lives for ¹²C emission from various Ba isotopes using different mass tables. The half life for ¹¹²Ba isotope calculated by us is 6.020 ´ 10³ s which is comparable with the experimental value 5.620 ´ 10³ s. From our study it is found that ¹¹⁴Ba is the good parent for ¹²C emission whose emission rate is favorable for measurement. The half lives predicted by us lie very close to those reported by Shanmugam et al using their cubic plus Yukawa plus exponential model. It is observed that inclusion of proximity potential does not produce significant deviation from the linear nature of the Geiger--Nuttall plots. Also it is found that the neutron excess in the parent nuclei slows down the exotic decay process.

Keywords: Exotic decay.

Pacs No. 23.70.+j; 23.60.+e