Speaker
Dr
Ritwika Chakrabarti
(Department of Physics, K. J. Somaiya College of Science and Commerce, Mumbai)
Description
Nuclei with Z and N between 20 and 28 are unique as the A‒40 nucleons occupying f7/2 shell outside 40Ca core are low enough to allow a full shell model description, but at the same time the numbers are large enough to develop collective behavior. The level scheme of 51Cr nucleus with four proton particles and one neutron hole is indicative of single particle nature. But a strongly deformed band was also suggested in this nucleus [1]. Therefore it is an ideal candidate for observing the interplay between single-particle and collective structures, and for comparing the shell model and collective model within the same nucleus. High-spin states in 51Cr were populated using the 27Al (28Si,3pn) reaction and studied using INGA array at TIFR. This allowed the extension of the level scheme beyond band termination. The suggested deformed band has also been observed for the first time in a heavy-ion reaction. A ΔJ=1 sequence of transitions with energies that follow the J(J+1) rule has been observed. Large scale shell model calculations in the full fp model space, with and without sub-shell restrictions, were performed. Lifetime, DCO ratio and polarisation measurements has been carried out. Results in detail will be presented during the meeting.
Reference:
[1] J. Kasagi and H. Ohnuma, J. Phys. Soc. Japan 45, 1009 (1978).
Primary author
Dr
Ritwika Chakrabarti
(Department of Physics, K. J. Somaiya College of Science and Commerce, Mumbai)
Co-authors
Dr
B. N. Joshi
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai)
Dr
B. V. John
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai)
Dr
D. C. Biswas
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai)
Mr
G. K. Prajapati
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai)
Dr
J. Sethi
(Department of Nuclear and Atomic Physics, TIFR, Mumbai)
Mr
L. S. Danu
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai)
Dr
R. Palit
(Department of Nuclear and Atomic Physics, TIFR, Mumbai)
Dr
S. Saha
(Department of Nuclear and Atomic Physics, TIFR, Mumbai)
Dr
Somsundar Mukhopadhyay
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai)
Prof.
Sujit Tandel
(Centre For Excellence in Basic Sciences Mumbai)
Dr
Yogesh Gupta
(Nuclear Physics Division, BARC)
