Rotational structures and their evolution with spin in {sup 152}Gd.
The fusion-evaporation reaction involving a 175 MeV {sup 36}S beam and a {sup 124}Sn target was performed, and the emitted {gamma} rays were observed with the Gammasphere spectrometer. Significant additions to the level scheme of {sup 152}Gd were made in spite of the relative weakness of the {alpha}4n exit channel, being only {approx}2% of the total fusion cross-section. The high-spin behavior of {sup 152}Gd was compared with that of other N=88 nuclei. A striking similarity was observed with {sup 154}Dy and it is therefore suggested that the angular-momentum-induced shape changes that take place in {sup 154}Dy also occur in {sup 152}Gd in the 30--40{h_bar} spin range. This is supported by Cranked Nilsson-Strutinsky calculations which were used to interpret the high-spin bands. It is found that a better agreement between calculation and experiment is obtained if the Z=64 shell gap increases with a decreasing number of valence particles outside the doubly-closed {sub 64}{sup 146}Gd82 nucleus.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); NSF-Florida; UK Engineering and Physical Science Research Council; Swedish Science Research Council
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 914961
- Report Number(s):
- ANL/PHY/JA-58683; PRVCAN; TRN: US200817%%36
- Journal Information:
- Phys. Rev. C, Vol. 75, Issue 2007; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- ENGLISH
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