Excited states of the doubly odd deformed nucleus 160Tm

doi:10.1016/0375-9474(78)90509-2

Nuclear Physics A

Volume 311, Issues 1–2, November 1978, Pages 188-204

https://doi.org/10.1016/0375-9474(78)90509-2 Get rights and content

Abstract

The decay of 4.8 min ¹⁶⁰Yb has been investigated by means of Ge(Li) detectors, toroidal and magnetic-lens β-spectrometers and scintillation counters. The singles spectra of γ-rays and conversion electrons as well as prompt and delayed γ-γ and γ-ce coincidences have been measured. The ¹⁶⁰Tm level scheme is proposed including 94.5% of the total γ-ray intensity observed in the ¹⁶⁰Yb decay. The lifetimes of the 42.02, 174.40 and 215.78 keV states have been determined to be 1.6±0.3, 17±1 and 0.65±0.15 ns, respectively. From the analysis of the experimental data, the quantum characteristics of ¹⁶⁰Tm levels are proposed. Experimental γ-ray transition probabilities are compared with Weisskopf and Nilsson estimates, the latter also taking into account pairing correlations.

References (36)

C. Ekström et al.
Nucl. Phys.
(1971)
G. Beyer et al.
Nucl. Instr.
(1971)
A. Latuszynski et al.
Nucl. Instr.
(1974)
W. Andrejtscheff et al.
Nucl. Phys.
(1974)
K.D. Schilling et al.
Nucl. Phys.
(1976)
W. Andrejtscheff et al.
Dubna report JINR P13-11312
(1978)
H. Strusny et al.
Czech. J. Phys.
(1975)
E.E. Berlovich et al.
Vremena shizni vozbushdennykh sostoyanij atomnykh yader
(1972)
C. Gustafson et al.
Ark. Fys.
(1967)
G.F. Dranitsina et al.
Izv. Akad. Nauk SSSR (ser. fiz.)
(1968)
A.B. Burson et al.
Nucl. Phys.
(1973)

B.S. Nielsen et al.

Nucl. Phys.

(1975)

V.G. Soloviev

Phys. Lett.

(1966)

I. Adam et al.

Dubna report JINR P6-11425

(1978)

C.J. Gallagher et al.

Phys. Rev.

(1958)

M. Neiman et al.

Preprint UCRL-18667

(1968)

F.W.N. de Boer et al.

Preprint CERN 70-30

(1970)

I. Adam et al.

Izv. Akad. Nauk SSSR (ser. fiz.)

(1974)

G. Beyer et al.

Acta Phys. Pol.

(1975)

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The experimental results published before May 2021 from the various reaction and decay studies leading to nuclides of Z=59 to Z=75, ¹⁶⁰Pr, ¹⁶⁰Nd, ¹⁶⁰Pm, ¹⁶⁰Sm, ¹⁶⁰Eu, ¹⁶⁰Gd, ¹⁶⁰Tb, ¹⁶⁰Dy, ¹⁶⁰Ho, ¹⁶⁰Er, ¹⁶⁰Tm, ¹⁶⁰Yb, ¹⁶⁰Lu, ¹⁶⁰Hf, ¹⁶⁰Ta, ¹⁶⁰W, ¹⁶⁰Re in the A=160 mass chain have been reviewed. These data are summarized and presented, together with adopted level schemes and properties. This work is intended to supersede the previous evaluation of the A=160 nuclides by C.W.Reich (2005Re18), which was published in Nuclear Data Sheets 105, 557 (2005).
Nuclear data sheets for A = 160
2005, Nuclear Data Sheets
The experimental results from the various reaction and decay studies leading to nuclides in the $A = 160$ mass chain have been reviewed. The elements included range from Sm ( $Z = 62$ ) through Re ( $Z = 75$ ). These data are summarized and presented, together with adopted level schemes and properties. This work is intended to supersede the previous evaluation of the $A = 160$ nuclides by this author (1996Re22), which was published in Nuclear Data Sheets 78, 547 (1996).
Nuclear data sheets for A = 160
1996, Nuclear Data Sheets
Abstract:The experimental results from the various reaction and decay studies leading to nuclides in the A = 160 mass chain have been reviewed. The elements included range from Sm(Z = 62) through Re(Z = 75). These data are summarized and presented, together with adopted level schemes and properties.Cutoff Date:Data available prior to June 1996 have been considered.General Policies and Organization of Material:See the January issue of Nuclear Data Sheets.Acknowledgments:The evaluator wishes to thank R. G. Helmer for helpful discussions.General Comments:In this evaluation, the following expression was used to define the rotational-band parameters A and B:[formula]with the following terms added as needed for K = 1 and 2 bands:[formula]and[formula]In the computation of values for these parameters, only the minimum number of levels, consistent with the number of parameters being determined, was used. Generally, these were the lowest-laying ones. In most cases where band parameters are quoted, the levels that were used to compute them are given also.
Nuclear data sheets for A = 160
1993, Nuclear Data Sheets
Nuclear data sheets for A = 160
1985, Nuclear Data Sheets
The generalized centroid shift method for lifetime measurements in heavy ion reactions
1982, Nuclear Instruments and Methods In Physics Research
An application of the generalized centroid shift method for lifetime measurements in the nano-second and subnanosecond region in HI reactions on the Rutgers tandem is described. Depayed γγ-coincidence measurements using plastic scintillators (start) and a germanium detector (stop) are discussed. Details of the analysis including treatment of the time background (random coincidences) and the choice of range of analysis of the time distributions are considered. As illustrations, lifetime measurements performed in (HI, xpyn) reactions are presented: $T_{12} (3679 keV in^{106} Cd)=0.7±0.2 ns$ , $T_{12} (3508 keV in^{106} Cd)=1.2±0.4 ns$ , $T_{12} (1256 keV in^{109} Sn)=2.0±0.3 ns$ and $T_{12} (3177 keV in^{100} Pd)=0.9±0.2 ns$ .

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^†: On leave from Samarkand State University, Samarkand, USSR.

^††: Present address: Technische Universität Dresden, GDR.

^†††: Present address: JINR Dubna, USSR.

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Excited states of the doubly odd deformed nucleus 160Tm

Abstract

Nucl. Phys.

Nucl. Instr.

Nucl. Instr.

Nucl. Phys.

Nucl. Phys.

Dubna report JINR P13-11312

Czech. J. Phys.

Ark. Fys.

Izv. Akad. Nauk SSSR (ser. fiz.)

Nucl. Phys.

Nucl. Phys.

Phys. Lett.

Dubna report JINR P6-11425

Phys. Rev.

Preprint UCRL-18667

Preprint CERN 70-30

Izv. Akad. Nauk SSSR (ser. fiz.)

Acta Phys. Pol.

Excited states of the doubly odd deformed nucleus ¹⁶⁰Tm