High-spin states and shell structure of the odd-odd nucleus {sup 90}Nb

Journal Article · Sat Oct 01 04:00:00 EDT 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.72.044322· OSTI ID:20699068

Cui, X Z; Zhang, Z L; Meng, R; Yang, C X ^[1]; Zhu, L H; Wu, X G; Wang, Z M; He, C Y; Li, G S; Wen, S X; Ma, R G ^[1]; Liu, Y ^[1]; Luo, P; Zheng, Y ^[2]; Ndontchueng, M M ^[3]; Huo, J D ^[4]

---

1. China Institute of Atomic Energy, Beijing 102413 (China)
2. Institute of Modern Physics, Lanzhou 730000 (China)
3. Universite de Douala, Faculte de Sciences, B.P. 8580 (Cameroon)
4. College of Physics, Jilin University, Changchun 130021 (China)

The high-spin states of the odd-odd nucleus {sup 90}Nb have been investigated with in-beam {gamma}-spectroscopic techniques via the {sup 76}Ge({sup 19}F,5n){sup 90}Nb reaction at a beam energy of 80 MeV. {gamma}-{gamma} coincidences were measured using a {gamma}-ray detector array. Twenty new {gamma} rays have been assigned to {sup 90}Nb and the level scheme has been extended up to an excitation energy of 8.095 MeV at spin 18({Dirac_h}/2{pi}). The level structure of {sup 90}Nb at high spin states has been well reproduced using semiempirical shell-model calculations in the model space {pi}(1p{sub 1/2},0f{sub 5/2},0g{sub 9/2}){nu}(0g{sub 9/2}). The results show that the excitation of protons plays an important role in generating the high-spin states of {sup 90}Nb.

• OSTI ID: 20699068
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 72; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COINCIDENCE SPECTROMETRY
EXCITATION
FLUORINE 19 REACTIONS
GAMMA RADIATION
GAMMA SPECTRA
GERMANIUM 76 TARGET
HIGH SPIN STATES
MEV RANGE
NIOBIUM 90
NUCLEAR CASCADES
NUCLEAR STRUCTURE
PROTONS
SHELL MODELS
SPIN