Extensive investigation of 0{sup +} states in rare earth region nuclei

Journal Article · Sun Oct 15 04:00:00 EDT 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.74.044309· OSTI ID:20863852

Meyer, D A ^[1]; Wood, V; Casten, R F; Jerke, J L ^[1]; Fitzpatrick, C R ^[1]; Graw, G; Hertenberger, R ^[2]; Bucurescu, D ^[3]; Jolie, J; Brentano, P von; Braun, N; Heinze, S; Moeller, O; Muecher, D; Scholl, C ^[4]; Wirth, H -F; Faestermann, T; Kruecken, R; Mahgoub, M ^[5]

---

1. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8124 (United States)
2. Department fuer Physik, Ludwig-Maximilians-Universitaet Muenchen, D-85748 Garching (Germany)
3. National Institute of Physics and Nuclear Engineering, Bucharest (Romania)
4. Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Cologne (Germany)
5. Physik Department, Technische Universitaet Muenchen, D-85748 Garching (Germany)

The nature of 0{sup +} excitations, especially in transitional and deformed nuclei, has attracted new attention. Following a recent experiment studying {sup 158}Gd, we investigated a large group of nuclei in the rare-earth region with the (p,t) pickup reaction using the Q3D magnetic spectrograph at the University of Munich MP tandem accelerator laboratory. Outgoing tritons were recorded at various lab angles, and their angular distributions are compared to those calculated using the distorted-wave Born approximation. Using the unique shape of the L=0 angular distribution, more than double the number of 0{sup +} states than were previously known are identified. The distribution of 0{sup +} energies and cross sections is discussed in terms of collective and noncollective degrees of freedom, and the density of low-lying 0{sup +} states is discussed as a corroboration of a characteristic feature of phase transition regions. The degree of level mixing, as extracted from Brody distribution fits to the energy spacings of adjacent 0{sup +} levels, is also explored.

• OSTI ID: 20863852
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 74; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
CRNL MP TANDEM ACCELERATOR
CROSS SECTIONS
DEFORMED NUCLEI
DEGREES OF FREEDOM
DWBA
ENERGY-LEVEL DENSITY
EXCITATION
GADOLINIUM 158
PHASE TRANSFORMATIONS
PICKUP REACTIONS
TRITONS