The decay of the new isotope171Re

Runte, E.; Meißner, F.; Freystein, V.; Hild, T.; Salewski, H.; Schmidt‐Ott, W. D.; Michaelsen, R.

doi:10.1007/bf01290506

Cited by 7 publications

(14 citation statements)

References 8 publications

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“…Similarly, in the decay of 1YaW with the 5/2-[523] configuration [2] we observed an allowed fl-transition to the 531 keV state in 171Ta. Again, we adopt the 7/2-[523] configuration for this level in agreement with the prediction given in Fig.…”

Section: Discussionsupporting

confidence: 68%

“…In a recent reinvestigation of the 172W decay by Szymanski et al [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] most of the earlier reported ~72W 7-rays were not confirmed, with the exception of a 424 and 631 keV radiation. The half-life of 1YeW was measured to be 8.03(42)rain [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. On the other hand, a remeasurement of the 173W half-life by Szymanski et al [18], yielding the similar value 7.97 (27) rain instead of the adopted value of 16 rain [9], again aggravated the classification of the observed 7-rays.…”

Section: The Decay Of 172wmentioning

confidence: 99%

“…Our investigations were performed for the tantalum isotopes 16~ including the observation of new isotopes 162Ta and 163Ta [1] and continued with a study of 171Re [2]. Further results were reported on 16~.…”

Section: Introductionmentioning

confidence: 97%

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Investigation of neutron-deficient tungsten isotopes168?174W

Meißner

Schmidt‐Ott

Freystein

et al. 1990

Z. Physik A - Atomic Nuclei

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The decays of 168-174 w were observed in the reactions of 36Ar and 4~ beams with enriched targets of 136BaF2 and 138BaF2" The measured half-lives are 53 (2) s, 76 (6) s, 2.42(4) min, 2.38(4) rain, 6.6(9) min, 6.3(4) rain, and 35.3(5) rain, respectively. Decay schemes were derived from the 7-and X-ray coincidence data. Spin assignments of ground-and excited states are discussed within experimental level systematics and compared with the results of microscopic-macroscopic model calculations. Excitation energies of modeled one-quasiparticle states were found in reasonable agreement with the experimental data. Allowed unhindered beta decay from the 5/2-[523] to the 7/2-[523] configuration was identified in lVlW and this transition is also proposed for the decays of the even-even isotopes 168, 1vow. PACS: 27.70. + q for half-life measurements. Coincidence data from a standard fast-slow coincidence set-up connecting the 7-and X-ray detector were recorded in list-mode on magnetic tape. Each coincidence event was also tagged with the time elapsed since the last tape movement. Identification of the isotopes ~7-,TS wThe isotopes 167-171W were identified by the measurement of excitation functions of new 7-rays and comparison with those of the ~33Cs(S6Ar, xn)169-XTa reactions ( Fig. 1 a). The evaporation of 3 <_ x < 6 neutrons yielded the well known ?-rays 396, 211, 163, and 159 keV from ~6a-~~176 decays. Gamma rays following the decays of tungsten isotopes were selected by requiring coincidence with tantalum X-rays. Excitation functions of tungsten 7-rays using a ~36Ba target are given in Fig. lb. The comparison in Fig. 1 of the measured yields for 94.4, 178.5, and 169.5 keV ?-rays gives the assignment of these lines to the decays of the nuclei 167W [4], ~68W, and 169W, respectively. Accordingly, the y-rays with energies 316.2 and 184.2 keV, which were observed in 36Ar on ~38Ba reactn .4-r-._d K. oq o~ >-a) 133[s (36Ar,xn)169-XTa 211 keV :~=Ta 163 keV ~5Ta / 10 ~ .... ~6s~ \

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Section: Discussionsupporting

confidence: 68%

Section: The Decay Of 172wmentioning

confidence: 99%

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Investigation of neutron-deficient tungsten isotopes168?174W

Meißner

Schmidt‐Ott

Freystein

et al. 1990

Z. Physik A - Atomic Nuclei

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“…These investigations were performed for the tantalum isotopes 16o-164Ta [1], for i64'16STa, 164'165Hf, 166W [2], 171Re [3], the tungsten isotopes 167-174W E4~6], and 176'177Ir E7]. In this paper we report on rhenium isotopes with mass numbers A = 166 to 170.…”

Section: Introductionmentioning

confidence: 97%

Revision of the decay data of166?170Re, including new isomers167m,169mRe

Meißner

Salewski

Schmidt‐Ott

et al. 1992

Z. Physik A - Hadrons and Nuclei

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The neutron-deficient rhenium isotopes 166-17~ were investigated using reactions of 32S with monoisotopic 141pr targets. Gamma-rays following the fl-decays of 166-169Rewere measured for the first time. Four new e-rays with energies of 4.70, 4.83, 4.87, and 5.02 MeV were detected in addition to the known 5.50, 5.26, and 5.06 MeV e-rays. Alpha-decaying isomer pairs were discovered in 167Re and 169Re. The measured half-lives are 2.3(2)s for 166Re, 3.4(4)s and 6.2(5)s for 167Re, 4.4(1)s for 168Re, 8.1(5)s and 16.3(8)s for 169Re, and 9.2(2)s for iV~ The nuclear structure is discussed in terms of single-particle states.

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“…The produced activities were collected using a helium-jet system, combined with a fast transport tape [1,5]. The produced activities were collected using a helium-jet system, combined with a fast transport tape [1,5].…”

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confidence: 99%