Investigation the properties of 8-17 B isotopes halo nuclei

Much effort has been dedicated in recent years to the study of nuclei away fromthe valley of beta stability. A very interesting and puzziling phenomenon wasdiscovery of halo nuclei. The discovery and the interpretation of thephenomenon of halo nuclei was initiated in the mid-eighties by the pioneeringwork of Tanihata and coworkers. In these experiments the total interactioncross section σI was determined for the interaction of light neutron-richisotopes wiht various targets. σI was deduced from the change of intensity of abeam of exotic nuclei before and after hitting a target. The surprisingly step riseof σI for 11Li in the chain of the Li-isotopes , and less pronounced, for 6He and8He for the He-isotopes, was therefore interpreted as due to a pronouncedincrease of the nuclear matter radius. Experiments performed at the on-linesmass seperator ISOLDE at CERN focused on the electiric and magneticmoments of halo nuclei.The nuclei near the dripline, under certain circumstances, have been found toform a neutron or proton halo with a mass distribution that extends far outsidethe nuclear core. In this nuclei, since the seperation energy of the last nucleon(s)becomes extremely small, the root mean square (rms) values of halos thatextends far outside the core have been larger than core and matter radius ofnuclei. This effect of the halo could have an important influence in that theincreasing of the β-decay probability and the reducing of the logft values forhalo nuclei.8-17In this study we investigated the properties of B isotopes halo nuclei. The8-17properties of B isotopes are studied by using effective nucleon- nucleonintreaction, dependent from Skryme densities. Skryme force intreaction wasdescribed. Using the Skryme force parameters group the radiuses of nuetron-nuetron, proton and charge distributions (root-mean-squares) were calculated.The calculated theoretical results were compared with the experimental data.Science Code : 202.1.108Key Words : Halo nuclei, neutron halo, proton halo, nuclear radiusPage Number : 31Adviser : Yrd.Doç.Dr. Eyyüp TEL