Abstract
The Interacting Boson Model is applied to the even Kr 90 76 - isotopes. Excitation energies, electromagnetic transition strengths, quadrupole and magnetic dipole moments, and δ (E2/M1) multiple mixing ratios, monopole transitions and mixed symmetry states have been described systematically. It is seen that the properties of low-lying levels in these isotopes, for which the comparison between experiment and IBM-2 calculations is possible, can be satisfactorily characterized by the Interacting Boson Model-2 (IBM-2).
Highlights
The even–even 76-90Kr isotopes are the members of the chain existing around the mass region A ≅ 80 and they are settled away from both the proton closed-shell number at 28 and neutron closed shell at 50
Several theoretical and experimental studies of even-even Kr isotopes have been carried out Kaup, Gellberg (1979), while some have performed systematic analysis of Kr isotopes in Interacting Boson Model-2 (IBM-2), and reproduced energy levels
The results of interacting boson model (IBM)-2 was in good agreement with experimental data except for the state
Summary
The even–even 76-90Kr isotopes are the members of the chain existing around the mass region A ≅ 80 and they are settled away from both the proton closed-shell number at 28 and neutron closed shell at 50. The interacting boson model-2 (IBM-2) has recently been applied to many light isotopes of Kr with emphasizing on the energy levels and on the electromagnetic transition probabilities rates. Several theoretical and experimental studies of even-even Kr isotopes have been carried out Kaup, Gellberg (1979), while some have performed systematic analysis of Kr isotopes in IBM-2, and reproduced energy levels. Hellmeister, Keinonen (1979) studied the energy levels and electric transition probability and compared with experimental data.., Meyer et al (1984) investigated the nuclear structure of the 82Kr isotope , using in-beam spectroscopy studies and compare the experimental data with the results of IBM-2. [Glannatiempo et al, 4(1993) studied the life-time of the 0+2 level in the 80Kr isotope and compared with the calculated value of IBM-2. Deibaksh et al, (1995) have performed the IBM-2 calculation on Kr isotopes, using two-different approaches. The results of IBM-2 was in good agreement with experimental data except for the state
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