Speaker
Description
For many years, the first excited 0+ bands of well-deformed nuclei were understood as “β -vibrations”, following the seminal works of Bohr and Mottelson [1, 2]. Nevertheless, over the years it has become apparent that low-lying 0+ bands could also arise due to other effects such as shape-coexistence, and quadrupole pairing [3, 4, 5].
In this work, I will present a comprehensive dataset comprising of low-lying positive parity bands (β and γ bands) in even-even isotopes with N ~ 88 to 92 and proton numbers Z ~ 62 (Sm) to 70 (Yb). In order to produce a complete and definitive microscopic picture of the so-called β bands as well as other related low-lying positive parity excitations, an extensive systematic review is performed for these nuclei. The implication of the findings on the interpretation of the first excited 0+ states and other related low-lying positive-parity excitations is there from discussed.
Reference
[1] A. Bohr, Mat. Fys. Medd. Dan. Vid. Selsk. 26, 14 (1952).
[2] A. Bohr and B. R. Mottelson, Mat. Fys. Medd. Dan. Vid. Selsk. 27, 16 (1953).
[3] K. Heyde and J. L. Wood, Reviews of Modern Physics 83, 1467 (2011).
[4] J.F. Sharpey-Schafer et al., Eur. J. Phys. A 47, 5 (2011), Eur. J. Phys. A 47, 6 (2011).
[5] P.E. Garrett, J Phys. G: Nucl. Part. Phys. 27, R1 (2001).
