The yrast sequence in 183Tl has been studied for the first time in recoil-mass selected γ-ray spectroscopic measurements. A rotational-like cascade of seven transitions is established down to the band head with probable spin and parity (13/2+). Unlike in the adjacent odd-mass Tl nuclei, prompt γ decay from the yrast band to a lower lying weakly deformed (oblate) structure is not observed. These features are consistent with the predicted drop of the prolate band head in 183Tl compared to 185Tl. The implications for the prolate energy minimum in odd-mass Tl nuclei at the neutron i 13/2 midshell (N = 103) are discussed.
|Original language||English (US)|
|Number of pages||7|
|Journal||Physical Review C - Nuclear Physics|
|State||Published - Apr 2000|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics