Decay properties of the new proton-rich nucleus104Sn: Mass determinations beyond the proton drip line

Rathke, G. E.; Rykaczewski, K. P.; Kirchner, R.; Klepper, O.; Koslowsky, V.T.; Roeckl, E.; Schardt, D.; Grant, I. S.; Larsson, Pontus; Płochocki, A.; Ż̷ylicz, J.; Tidemand-Petersson, P.

doi:10.1007/bf01432436

Cited by 11 publications

(5 citation statements)

References 15 publications

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“…However, the beta decay pattern [32,33] QEc-value has been deduced from the intensities of the 1190 and 864 keV transitions in the singles spectrum and the spectrum gated by the annihilation radiation. The procedure was identical to the one adopted in our first study of t~ [5]. As seen from Table 3, the new 1~ result is very close to our previous value.…”

Section: Decay Energies and Decay Schemes Of 1~ And Lossnsupporting

confidence: 82%

“…In our earlier work [4,5], eight 7 transitions were unambiguously ascribed to the 1~ l~ decay. Also, a tentative partial decay scheme was proposed, the Q=c value was estimated to be 4000+650keV -300 and the half-life of 21 _+ 1 s was determined.…”

Section: The Isotope 1~ Experimental Results and Decay Schemementioning

confidence: 95%

“…Compared to our preceding investigation of the isotope ~~ [4,5] (see also the Leuven results * This work is part of the Ph.D. thesis of G.-E. Rathke…”

Section: Introductionmentioning

confidence: 94%

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The Gamow-Teller beta decay of neutron-deficient even isotopes of tin

Barden

Kirchner

Klepper

et al. 1988

Z. Physik A - Atomic Nuclei

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With the use of the 58Ni+S~ fusion-evaporation reaction and chemically selective on-line mass separation, the EC//3 + decay of t~ was studied by ?-ray and conversionelectron spectroscopy. In the course of these studies, a new 15.7-s isomeric state of t~ was observed. Reinvestigation of the {/-decays of the two heavier even isotopes of tin, produced in the s 8Ni + 58Ni reaction and mass separated without chemical discrimination, brought new information on the decay of l~ and ~~ The QEc values of 1~ l~ and 1~ were determined to be 4550 +300 keV, 3200+100 keV and -250 <2270 keV, respectively. In the data analysis, the emphasis is put on the identification of the 0+-~ 1 + Gamow-Teller /~ transitions and determination of their strengths. For 1~176 the total Gamow-Teller strengths are measured to be 20% to 30% of that predicted by the single-particle shell model with the inclusion of pairing correlations and core polarization. Predictions of the decay properties of the as yet unobserved ~~ and l~176 are made. 23.40.Hc; 21.10.Dr; 21.10.Pc; 27.60. +j; 29.30.Kv PACS: IntroductionThis paper presents a reinvestigation of the 104, 106,1088n EC/fl+ decays carried out at the GSI mass separator on-line to the UNILAC with the application of nuclear spectroscopy techniques. In the data analysis, the emphasis is put on the identification of the 0+~ 1 + Gamow-Teller (GT) transitions and determination of their strengths. The observation of more than one GT transition in each of the three decays, and the origin of quenching of the summed GT strengths compared to prediction of the extremesingle-particle shell model (ESPSM) are discussed with reference to theoretical studies [1][2][3].The main new results are those obtained for A = 104. Compared to our preceding investigation of the isotope ~~ [4,5] (see also the Leuven results * This work is part of the Ph.D. thesis of G.-E. Rathke[6]), an essential progress in studying its decay properties has been achieved due to the application of a mass-separator ion source [7,8] which allows for a substantial suppression of the isobaric contamination. Also the application of a mini-orange spectrometer [-9] for measuring the spectra of internal-conversion electrons appeared to be a very important addition to our 7-ray studies. As a result, the l~ --+ 1~ decay scheme is constructed with four wellestablished GT transitions.Four GT transitions (two of which were not reported in [10,11]) have also been observed in the 1~ decay. The previous version of the 1~ decay scheme [12, 13] has essentially been confirmed with respect to GT strength. Finally, the results of the present work have been extrapolated to get an estimate of the decay properties for the yet unobserved isotopes 1~and doubly magic l~176

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Section: Decay Energies and Decay Schemes Of 1~ And Lossnsupporting

confidence: 82%

Section: The Isotope 1~ Experimental Results and Decay Schemementioning

confidence: 95%

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The Gamow-Teller beta decay of neutron-deficient even isotopes of tin

Barden

Kirchner

Klepper

et al. 1988

Z. Physik A - Atomic Nuclei

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“…This missing strength can be accounted for by the use of an effective axial-vector constant g~/f ~-(1.6)-1/2. gA (2) which corresponds to the higher-order hindrance factor hh~--1.6 [1][2][3][4][5][6][7][8][9][10]. Finally, one introduces a small correction for the pairing correlations in the mother nucleus.…”

Section: Discussion Of Gamow-teller Beta Transitions In the Decay Of mentioning

confidence: 99%

“…[1][2][3]. Within the single-particle shell-model this occurrence of fast transitions can be qualitatively understood as resulting from the favoured spin-flip transformation of a g9/2 proton into a g7/2 neutron.…”

Section: Introductionmentioning

confidence: 98%

The Gamow-Teller transitions in the96Pd→96Rh decay

et al. 1985

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Using the 4~MeV/u)+6~ reaction and on-line mass separation, the decay 96 properties of 46Pdso were reinvestigated. From a comparison of experimental and theoretical fl § + fl+) probability ratios, the QEc value was deduced to be 3,450_+ 150 keV. The strength was determined for four 0+~ 1 § Gamow-Teller beta transitions and found to be quenched as compared to predictions of the single-particle shell model. For 96pd and 94Ru the sources of this quenching are discussed.

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The Gamow-Teller beta decay of100Cd

Rykaczewski

Płochocki

Grant

et al. 1989

Z. Physik A - Atomic Nuclei

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Neutron-deficient isotopes of cadmium were produced in the p(600 MeV)+natSn spaltation reaction. The ISOLDE facility provided mass-separated beams of these isotopes. The production yield was 103 to 104 atoms/s for l~176 and roughly two orders of magnitude less for 98Cd. The properties of the ~~176176176 decay were studied in detail by X-ray, y-ray and conversion electron spectroscopy. Forty nine y-transitions were assigned to this decay, and all but five of them were placed in the decay scheme. The half-life was determined to be 49.1+0.5 s. The QEC value of 3890+70keV was deduced from a comparison of experimental and theoretical /?+/(EC+/~ +) probability ratios. Seven 0+--*1 + Gamow-Teller transitions with log ft values between 3.5 and 4.9 were identified. The total (summed) strength is about five times smaller than predicted by the shell model for the transformation of a g9/2 proton into a g7/2 neutron. The quenching of the Gamow-Teller strength and other questions of nuclear structure are discussed for the ~~176 decay. The properties of 98Cd are inferred by extrapolation of 1~176176176 data, and some preliminary experimental results on 98Cd decay are presented.

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Decay properties of the new proton-rich nucleus104Sn: Mass determinations beyond the proton drip line

Cited by 11 publications

References 15 publications

The Gamow-Teller beta decay of neutron-deficient even isotopes of tin

The Gamow-Teller beta decay of neutron-deficient even isotopes of tin

The Gamow-Teller transitions in the96Pd→96Rh decay

The Gamow-Teller beta decay of100Cd

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