Multiple band structure and band termination in 157Ho towards complete high-spin spectroscopy

D. C. Radford; H. R. Andrews; G. C. Ball; D. Horn; D. Ward; F. Banville; S. Flibotte; S. Monaro; S. Pilotte; P. Taras; J. K. Johansson; D. Tucker; J. C. Waddington; M. A. Riley; G. B. Hagemann; I. Hamamoto

doi:10.1016/0375-9474(92)90298-X

Multiple band structure and band termination in ¹⁵⁷Ho towards complete high-spin spectroscopy

D. C. Radford, H. R. Andrews, G. C. Ball, D. Horn, D. Ward, F. Banville, S. Flibotte, S. Monaro, S. Pilotte, P. Taras, J. K. Johansson, D. Tucker, J. C. Waddington, M. A. Riley, G. B. Hagemann, I. Hamamoto

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73 Scopus citations

Abstract

Rotational bands of ¹⁵⁷Ho have been populated via the ¹²⁴Sn(³⁷Cl, 4n) reaction at beam energies of 155 and 165 MeV. Gamma-ray spectroscopy was performed using the 8π spectrometer at Chalk River. Many rotational bands have been observed for the first time. A detailed level scheme is presented, containing approximately 380 transitions, and the quasiparticle structure of the various bands is discussed. Band termination has been observed in the yrast states. For strongly coupled bands, B(M1)/B(E2) transition strength ratios are extracted and compared with previous measurements and theoretical expectations. Branching ratios for out-of-band E2 transitions are analysed to extract band mixing interaction strengths. Implications for rotational damping are considered. The interaction at the first backbend in the ground band is found to be strongly signature dependent; this is evidence for a signature-dependent triaxial shape of the nucleus.

Original language	English
Pages (from-to)	665-719
Number of pages	55
Journal	Nuclear Physics A
Volume	545
Issue number	3
DOIs	https://doi.org/10.1016/0375-9474(92)90298-X
State	Published - Aug 10 1992
Externally published	Yes

Keywords

Nuclear reactions

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10.1016/0375-9474(92)90298-X

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Radford, D. C., Andrews, H. R., Ball, G. C., Horn, D., Ward, D., Banville, F., Flibotte, S., Monaro, S., Pilotte, S., Taras, P., Johansson, J. K., Tucker, D., Waddington, J. C., Riley, M. A., Hagemann, G. B., & Hamamoto, I. (1992). Multiple band structure and band termination in ¹⁵⁷Ho towards complete high-spin spectroscopy. Nuclear Physics A, 545(3), 665-719. https://doi.org/10.1016/0375-9474(92)90298-X

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title = "Multiple band structure and band termination in 157Ho towards complete high-spin spectroscopy",

abstract = "Rotational bands of 157Ho have been populated via the 124Sn(37Cl, 4n) reaction at beam energies of 155 and 165 MeV. Gamma-ray spectroscopy was performed using the 8π spectrometer at Chalk River. Many rotational bands have been observed for the first time. A detailed level scheme is presented, containing approximately 380 transitions, and the quasiparticle structure of the various bands is discussed. Band termination has been observed in the yrast states. For strongly coupled bands, B(M1)/B(E2) transition strength ratios are extracted and compared with previous measurements and theoretical expectations. Branching ratios for out-of-band E2 transitions are analysed to extract band mixing interaction strengths. Implications for rotational damping are considered. The interaction at the first backbend in the ground band is found to be strongly signature dependent; this is evidence for a signature-dependent triaxial shape of the nucleus.",

keywords = "Nuclear reactions",

author = "Radford, {D. C.} and Andrews, {H. R.} and Ball, {G. C.} and D. Horn and D. Ward and F. Banville and S. Flibotte and S. Monaro and S. Pilotte and P. Taras and Johansson, {J. K.} and D. Tucker and Waddington, {J. C.} and Riley, {M. A.} and Hagemann, {G. B.} and I. Hamamoto",

year = "1992",

month = aug,

day = "10",

doi = "10.1016/0375-9474(92)90298-X",

language = "English",

volume = "545",

pages = "665--719",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier",

number = "3",

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Radford, DC, Andrews, HR, Ball, GC, Horn, D, Ward, D, Banville, F, Flibotte, S, Monaro, S, Pilotte, S, Taras, P, Johansson, JK, Tucker, D, Waddington, JC, Riley, MA, Hagemann, GB & Hamamoto, I 1992, 'Multiple band structure and band termination in ¹⁵⁷Ho towards complete high-spin spectroscopy', Nuclear Physics A, vol. 545, no. 3, pp. 665-719. https://doi.org/10.1016/0375-9474(92)90298-X

TY - JOUR

T1 - Multiple band structure and band termination in 157Ho towards complete high-spin spectroscopy

AU - Radford, D. C.

AU - Andrews, H. R.

AU - Ball, G. C.

AU - Horn, D.

AU - Ward, D.

AU - Banville, F.

AU - Flibotte, S.

AU - Monaro, S.

AU - Pilotte, S.

AU - Taras, P.

AU - Johansson, J. K.

AU - Tucker, D.

AU - Waddington, J. C.

AU - Riley, M. A.

AU - Hagemann, G. B.

AU - Hamamoto, I.

PY - 1992/8/10

Y1 - 1992/8/10

N2 - Rotational bands of 157Ho have been populated via the 124Sn(37Cl, 4n) reaction at beam energies of 155 and 165 MeV. Gamma-ray spectroscopy was performed using the 8π spectrometer at Chalk River. Many rotational bands have been observed for the first time. A detailed level scheme is presented, containing approximately 380 transitions, and the quasiparticle structure of the various bands is discussed. Band termination has been observed in the yrast states. For strongly coupled bands, B(M1)/B(E2) transition strength ratios are extracted and compared with previous measurements and theoretical expectations. Branching ratios for out-of-band E2 transitions are analysed to extract band mixing interaction strengths. Implications for rotational damping are considered. The interaction at the first backbend in the ground band is found to be strongly signature dependent; this is evidence for a signature-dependent triaxial shape of the nucleus.

AB - Rotational bands of 157Ho have been populated via the 124Sn(37Cl, 4n) reaction at beam energies of 155 and 165 MeV. Gamma-ray spectroscopy was performed using the 8π spectrometer at Chalk River. Many rotational bands have been observed for the first time. A detailed level scheme is presented, containing approximately 380 transitions, and the quasiparticle structure of the various bands is discussed. Band termination has been observed in the yrast states. For strongly coupled bands, B(M1)/B(E2) transition strength ratios are extracted and compared with previous measurements and theoretical expectations. Branching ratios for out-of-band E2 transitions are analysed to extract band mixing interaction strengths. Implications for rotational damping are considered. The interaction at the first backbend in the ground band is found to be strongly signature dependent; this is evidence for a signature-dependent triaxial shape of the nucleus.

KW - Nuclear reactions

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U2 - 10.1016/0375-9474(92)90298-X

DO - 10.1016/0375-9474(92)90298-X

M3 - Article

AN - SCOPUS:0000052493

SN - 0375-9474

VL - 545

SP - 665

EP - 719

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 3

ER -

Multiple band structure and band termination in ¹⁵⁷Ho towards complete high-spin spectroscopy

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