Phase transitions above the yrast line in 154Dy

Authors :: Grabowski, Z.W.
Carpenter, M.P.
Nisius, D.
Martin, V.
Egido, J.L.
Ahmad, I.
Daly, P.J.
Zhang, C.T.
Ma, W.C.
Hamilton, J.H.
Lauritsen, T.
Varmette, P.G.
Bhattacharyya, P.
Janssens, R.V.F.
Ramayya, A.V.
Khoo, T.L.
Publication Year :: 2000
Publisher :: American Physical Society, 2000.
Abstract: Spectra of the E2 quasicontinuum γ rays feeding different spin regions of the 154Dy yrast line have been extracted. These are compared with corresponding theoretical spectra obtained by numerical simulations based on temperature-dependent Hartree-Fock theory, with thermal shape fluctuations. In this manner, different regions of the spin-energy plane can be examined. The results support the predictions of a smeared-out phase transition at high spin above the yrast line.