Abstract.
Low-spin positive-parity yrare states of 15466 Dy88 were established using the 155Gd(3He,4n) reaction at a beam energy of \(E_{lab} = 37.5\) MeV. The AFRODITE spectrometer array at iThemba LABS was used to record \(\gamma\gamma\) coincidences and measure DCO ratios and polarisation asymmetries. The \(K^{\pi}=2^{+}\) \( \gamma\) band has been observed up to spin \(13^{+}\) in the odd spins and to \( 12^{+}\) in the even spins. The staggering parameter S(I) of the \( \gamma\) band is compared to that found in other N = 88 isotones. Different behaviour of S(I) with increasing spin is observed for each of the isotones. We conjecture that the variation in S(I) is mainly due to mixing of the even-spin states with the same spin and parity states in neighbouring rotational bands. A second \( K^{\pi}=2^{+}\) band has been established up to a spin of \( 12^{+}\) in the even spins. We suggest that this is a \( \gamma\) band based on the \( J^{\pi} = 0^{+}\) state at \( E_{x} = 660.6\) keV.
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References
H. Morinaga, Nucl. Phys. 75, 385 (1966)
C. Girit, W.D. Hamilton, C.A. Kalfas, J. Phys. G 9, 7 (1983)
A. Passoja et al., J. Phys. G 12, 1047 (1986)
H.W. Cranmer-Gordon et al., Nucl. Phys. A 465, 506 (1987)
E.S. Paul et al., Phys. Rev. C 79, 044324 (2009)
X. Wang, Phys. Lett. B 702, 127 (2011)
J.M. Rees et al., Phys. Rev. C 83, 044314 (2011)
N.V. Zamfir, R.F. Casten, Phys. Lett. B 260, 265 (1991)
W.C. Ma et al., Phys. Rev. C 65, 034312 (2002)
D.R. Zolnowski et al., Phys. Rev. C 21, 2556 (1980)
A. Bohr, B.R. Mottelson, Nuclear Structure, Vol. III (World Scientific, 1975)
A. Bohr, Phys. Rev. 81, 331 (1951)
A. Bohr, Phys. Rev. 81, 134 (1951)
A. Faessler, W.Z. Greiner, Z. Phys. 168, 425 (1962)
A. Faessler, W.Z. Greiner, Z. Phys. 170, 105 (1962)
A. Faessler, W.Z. Greiner, Z. Phys. 177, 190 (1964)
P.E. Garrett, J. Phys. G 27, R1 (2001)
J.F. Sharpey-Schafer et al., Eur. Phys. J. A 47, 5 (2011)
J.F. Sharpey-Schafer et al., Eur. Phys. J. A 47, 6 (2011)
W.D. Kulp et al., Phys. Rev. C 77, 061301(R) (2008)
I. Ragnarsson, R.A. Broglia, Nucl. Phys. A 263, 315 (1975)
P.E. Garrett et al., Phys. Rev. Lett. 103, 062501 (2009)
W.C. Ma et al., Phys. Rev. Lett. 61, 46 (1988)
Q.A. Ijaz et al., Phys. Rev. C 80, 034322 (2009)
J.F. Sharpey-Schafer, Nucl. Phys. News Int. 14, 5 (2004)
D.C. Radford, Nucl. Instrum. Methods Phys. Res. A 306, 297 (1995)
K.S. Krane, R.M. Steffen, R.M. Wheeler, Nucl. Data Tables 11, 351 (1973)
J.H. Lee et al., J. Korean Phys. Soc. 40, 5 (2002)
P.M. Jones et al., Nucl. Instrum. Methods 362, 2 (1995)
G.L. Zimba, MSc Thesis, Univ. of Johannesburg (2015)
G.L. Zimba et al., Phys. Rev. C 94, 054303 (2016)
C.W. Reich, Nucl. Data. Tables 110, 2257 (2009)
L. Msebi, MSc Thesis, Univ. of Johannesburg (2016)
S.P. Bvumbi, MSc Thesis, Univ. of the Western Cape (2008)
P.I. Mashita, MSc Thesis, Univ. of the Western Cape (2013)
L. Wilets, M. Jean, Phys. Rev. 102, 788 (1956)
A.S. Davydov, G.F. Filipov, Nucl. Phys. 8, 237 (1958)
A.S. Davydov, At. Energy Rev. 6, 3 (1968)
Z.P. Li, private communication
Z. Shi, B.Y. Song, Z.P. Li, S.Q. Zhang, private communication
S. Frauendorf, F.R. May, Phys. Lett. B 125, 245 (1983)
Yang Sun et al., Phys. Rev. C 61, 064323 (2000)
J.A. Sheikh, G.H. Bhat, Y. Sun, G.B. Vakil, R. Palit, Phys. Rev. C 77, 034313 (2008)
J.A. Sheikh, G.H. Bhat, R. Palit, Z. Naik, Y. Sun, Nucl. Phys. A 824, 58 (2009)
T. Nii, Z.P. Li, D. Vretenar, L. Prachniak, J. Meng, P. Ring, Phys. Rev. C 79, 034303 (2009)
Z.P. Li, T. Nii, D. Vretenar, J. Meng, G.A. Lalazissis, P. Ring, Phys. Rev. C 79, 054301 (2009)
S.N.T. Majola et al., Phys. Rev. C 91, 034330 (2015)
W.-T. Chou, Gh. Cata-Danil, N.V. Zamfir, R.F. Casten, N. Pietralla, Phys. Rev. C 64, 057301 (2001)
W.D. Kulp et al., Phys. Rev. C 76, 034319 (2000) and private communication
S.P. Bvumbi, PhD Thesis, University of Johannesburg (2013)
R.L. Andrews, R.D. Graham, H. Ward, J.S. Geiger, Nucl. Phys. A 219, 141 (1974)
R. Bengtsson, S. Frauendorf, Nucl. Phys. A 327, 139 (1979)
S.M. Harris, Phys. Rev. 138, B509 (1965)
L.L. Riedinger et al., Phys. Rev. Lett. 44, 568 (1980)
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Zimba, G.L., Bvumbi, S.P., Masiteng, L.P. et al. Yrare low-spin positive-parity states in N = 88 15466 Dy. Eur. Phys. J. A 54, 59 (2018). https://doi.org/10.1140/epja/i2018-12496-3
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DOI: https://doi.org/10.1140/epja/i2018-12496-3