Yrare low-spin positive-parity states in N = 88 66154 Dy

G. L. Zimba; S. P. Bvumbi; L. P. Masiteng; P. Jones; J. F. Sharpey-Schafer; S. N.T. Majola; T. S. Dinoko; O. Shirinda; J. J. Lawrie; J. E. Easton; N. A. Khumalo; L. Msebi; P. I. Mashita; P. Papka; D. G. Roux; D. Negi

doi:10.1140/epja/i2018-12496-3

Yrare low-spin positive-parity states in N = 88 ₆₆¹⁵⁴ Dy

G. L. Zimba, S. P. Bvumbi, L. P. Masiteng, P. Jones, J. F. Sharpey-Schafer, S. N.T. Majola, T. S. Dinoko, O. Shirinda, J. J. Lawrie, J. E. Easton, N. A. Khumalo, L. Msebi, P. I. Mashita, P. Papka, D. G. Roux, D. Negi

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6 Citations (Scopus)

Abstract

Low-spin positive-parity yrare states of ₆₆¹⁵⁴Dy₈₈ were established using the ¹⁵⁵Gd(³He,4n) reaction at a beam energy of E_l_a_b= 37. 5 MeV. The AFRODITE spectrometer array at iThemba LABS was used to record γγ coincidences and measure DCO ratios and polarisation asymmetries. The K^π= 2 ⁺γ 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 γ 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^π= 2 ⁺ band has been established up to a spin of 12 ⁺ in the even spins. We suggest that this is a γ band based on the J^π= 0 ⁺ state at E_x= 660. 6 keV.

Original language	English
Article number	59
Journal	European Physical Journal A
Volume	54
Issue number	4
DOIs	https://doi.org/10.1140/epja/i2018-12496-3
Publication status	Published - 1 Apr 2018
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1140/epja/i2018-12496-3

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Zimba, G. L., Bvumbi, S. P., Masiteng, L. P., Jones, P., Sharpey-Schafer, J. F., Majola, S. N. T., Dinoko, T. S., Shirinda, O., Lawrie, J. J., Easton, J. E., Khumalo, N. A., Msebi, L., Mashita, P. I., Papka, P., Roux, D. G., & Negi, D. (2018). Yrare low-spin positive-parity states in N = 88 ₆₆¹⁵⁴ Dy. European Physical Journal A, 54(4), Article 59. https://doi.org/10.1140/epja/i2018-12496-3

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title = "Yrare low-spin positive-parity states in N = 88 66154 Dy",

abstract = "Low-spin positive-parity yrare states of 66154Dy88 were established using the 155Gd(3He,4n) reaction at a beam energy of Elab= 37. 5 MeV. The AFRODITE spectrometer array at iThemba LABS was used to record γγ coincidences and measure DCO ratios and polarisation asymmetries. The Kπ= 2 +γ 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 γ 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 Kπ= 2 + band has been established up to a spin of 12 + in the even spins. We suggest that this is a γ band based on the Jπ= 0 + state at Ex= 660. 6 keV.",

author = "Zimba, {G. L.} and Bvumbi, {S. P.} and Masiteng, {L. P.} and P. Jones and Sharpey-Schafer, {J. F.} and Majola, {S. N.T.} and Dinoko, {T. S.} and O. Shirinda and Lawrie, {J. J.} and Easton, {J. E.} and Khumalo, {N. A.} and L. Msebi and Mashita, {P. I.} and P. Papka and Roux, {D. G.} and D. Negi",

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doi = "10.1140/epja/i2018-12496-3",

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T1 - Yrare low-spin positive-parity states in N = 88 66154 Dy

AU - Zimba, G. L.

AU - Bvumbi, S. P.

AU - Masiteng, L. P.

AU - Jones, P.

AU - Sharpey-Schafer, J. F.

AU - Majola, S. N.T.

AU - Dinoko, T. S.

AU - Shirinda, O.

AU - Lawrie, J. J.

AU - Easton, J. E.

AU - Khumalo, N. A.

AU - Msebi, L.

AU - Mashita, P. I.

AU - Papka, P.

AU - Roux, D. G.

AU - Negi, D.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - Low-spin positive-parity yrare states of 66154Dy88 were established using the 155Gd(3He,4n) reaction at a beam energy of Elab= 37. 5 MeV. The AFRODITE spectrometer array at iThemba LABS was used to record γγ coincidences and measure DCO ratios and polarisation asymmetries. The Kπ= 2 +γ 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 γ 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 Kπ= 2 + band has been established up to a spin of 12 + in the even spins. We suggest that this is a γ band based on the Jπ= 0 + state at Ex= 660. 6 keV.

AB - Low-spin positive-parity yrare states of 66154Dy88 were established using the 155Gd(3He,4n) reaction at a beam energy of Elab= 37. 5 MeV. The AFRODITE spectrometer array at iThemba LABS was used to record γγ coincidences and measure DCO ratios and polarisation asymmetries. The Kπ= 2 +γ 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 γ 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 Kπ= 2 + band has been established up to a spin of 12 + in the even spins. We suggest that this is a γ band based on the Jπ= 0 + state at Ex= 660. 6 keV.

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Yrare low-spin positive-parity states in N = 88 ₆₆¹⁵⁴ Dy

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