The decay of 174Tm and mixing of the Kπ = 5− two-quasiparticle states in 174Yb

doi:10.1016/0375-9474(75)90684-3

Nuclear Physics A

Volume 255, Issue 2, 22 December 1975, Pages 339-350

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Abstract

The decay of 5.4 min ¹⁷⁴Tm has been investigated using Ge(Li) spectrometers in singles and coincidence measurements. A total of 43 γ-ray transitions, 26 of them not reported before, have been observed following the decay of ¹⁷⁴Tm. All transitions could be placed in a level scheme comprising 19 excited states of ¹⁷⁴Yb. The Nilsson model has been used to interpret the level structure. The mixing of two-quasineutron and two-quasiproton states is studied and the experimental mixing matrix element is compared with the results of theoretical calculations.

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Cited by (12)

Nuclear data sheets for A = 174
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Nuclear data sheets update for A = 174
1991, Nuclear Data Sheets
Angular distribution studies in <sup>172, 174</sup>Yb
1986, Nuclear Physics, Section A
Levels in ^{172, 174}Yb have been studied using the (n, n'γ) reactions with reactor fast neutrons. Angular distributions of γ-rays with respect to the neutron beam have been measured. Ambiguities involving the 1640.7 keV level in ¹⁷²Yb and the 2101.2 keV level in ¹⁷⁴Yb have been resolved revealing spin-parity assignments of 4⁻ and 4⁺ respectively. Seven new states at 2320.7, 2350.4, 2436.5, 2601.2, 2796.0, 3403.0 and 3427.0 keV have been proposed in ¹⁷⁴Yb. The 2601.2 and 3403.0 keV levels have been assigned as J^π = 4⁺ and J^π = (3, 5⁻) respectively. Gamma branching ratios have been determined and compared with previous results. The mixing ratios for several γ-transitions have been deduced and compared, where possible, with values obtained by the complete alignment method (CAM) and with those previously reported by other authors. The experimental levels in ^{172, 174}Yb have been compared with IBA model predictions.
Nuclear Data Sheets for A=174
1984, Nuclear Data Sheets
Projected shell model study of ground state bands in <sup>171–175</sup>Tm
2016, Indian Journal of Physics
Multiquasiparticle states in the neutron-rich nucleus 174Tm
2013, Physical Review C - Nuclear Physics

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^†: On leave of absence from Institute of Experimental Physics, Warsaw University, 00-681 Warsaw, Poland.

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The decay of 174Tm and mixing of the Kπ = 5− two-quasiparticle states in 174Yb

Abstract

Nucl. Data Sheets

Nucl. Data

Nucl. Data Tables

JINR report D-2157

Z. Phys.

Z. Phys.

Z. Phys.

Ark. Fys.

Beta processes

Phys. Rev.

The decay of ¹⁷⁴Tm and mixing of the K^π = 5⁻ two-quasiparticle states in ¹⁷⁴Yb