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1

Digitale Medien

Sign and magnitude of the coriolis coupling between the 52^-[532] and 72^-[523] orbitals in ^1^6^1Tb

Zylicz, J. ; Hansen, P.G. ; Nielsen, H.L. ; [weitere]

Amsterdam : Elsevier

Nuclear Physics 84 (1966), S. 13-24

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ISSN: 0029-5582

Schlagwort(e): Enriched target ; Radioactivity ^1^6^1Gd [from ^1^6^0Gd n-capture] ; ^1^6^1Tb deduced levels, J^π, Coriolis-coupling parameter A"K ; measured T"1"2, E"γ, I"γ, E"β, γγ-coin

Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Thema: Physik

Materialart: Digitale Medien

URL: http://linkinghub.elsevier.com/retrieve/pii/0029-5582(66)90429-9

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2

Digitale Medien

The Gamow-Teller beta decay of neutron-deficient even isotopes of tin (1988)

Barden, R. ; Kirchner, R. ; Klepper, O. ; [weitere]

Springer

The European physical journal 329 (1988), S. 319-330

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ISSN: 1434-601X

Schlagwort(e): 23.40.Hc ; 21.10.Dr ; 21.10.Pc ; 27.60.+j ; 29.30.Kv

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract With the use of the58Ni+50Cr fusion-evaporation reaction and chemically selective on-line mass separation, the EC/β + decay of104Sn was studied byγ-ray and conversionelectron spectroscopy. In the course of these studies, a new 15.7-s isomeric state of104In was observed. Reinvestigation of theβ-decays of the two heavier even isotopes of tin, produced in the58Ni+58Ni reaction and mass separated without chemical discrimination, brought new information on the decay of106Sn and108Sn. The QEC values of104Sn,106Sn and108Sn were determined to be 4550 −250 +300 keV, 3200±100 keV and 〈 2270 keV, respectively. In the data analysis, the emphasis is put on the identification of the 0+ → 1+ Gamow-Tellerβ transitions and determination of their strengths. For104−110Sn, 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 unobserved102Sn and100Sn are made.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01290237

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3

Digitale Medien

The Gamow-Teller beta decay of100Cd (1989)

Rykaczewski, K. ; Płochocki, A. ; Grant, I. S. ; [weitere]

Springer

The European physical journal 332 (1989), S. 275-284

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ISSN: 1434-601X

Schlagwort(e): 23.40.Hc ; 21.10.Dr ; 27.60.+j ; 29.30.Kv

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Neutron-deficient isotopes of cadmium were produced in thep(600 MeV)+natSn spallation reaction. The ISOLDE facility provided mass-separated beams of these isotopes. The production yield was 103 to 104 atoms/s for100Cd and roughly two orders of magnitude less for98Cd. The properties of the100Cd→100Ag decay were studied in detail by X-ray,γ-ray and conversion electron spectroscopy. Forty nineγ-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. TheQ EC value of 3890±70 keV was deduced from a comparison of experimental and theoreticalβ +/(EC+β + 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 ag 9/2 proton into ag 7/2 neutron. The quenching of the Gamow-Teller strength and other questions of nuclear structure are discussed for the100Cd decay. The properties of98Cd are inferred by extrapolation of104,102,100Cd data, and some preliminary experimental results on98Cd decay are presented.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01295457

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4

Digitale Medien

Gamow-Teller decay of118Pd and of neighbouring even isotopes of palladium (1989)

Koponen, V. ; Äystö, J. ; Honkanen, J. ; [weitere]

Springer

The European physical journal 333 (1989), S. 339-348

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ISSN: 1434-601X

Schlagwort(e): 23.40.Hc ; 21.10.Dr ; 21.10.Pc ; 27.60.+j ; 29.30.Kv

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Neutron-rich isotopes of palladium were produced via the fission of238U by 20 MeV protons. These isotopes were selected using the ion guide-fed on-line mass-separator facility IGISOL at Jyväskylä. Their decays were studied byβ-ray,γ-ray and conversion-electron spectroscopy. For114Pd and116Pd, the decay schemes established previously were confirmed; additionally multipolarities were determined for a few transitions. In the case of118Pd, only an approximate half-life was known from a previous radiochemical experiment. In the present study, 15 gamma transitions were observed, most of which were placed in a decay scheme. The half-life and the decay energy were found to beT 1/2=1.9±0.1 s andQ β=4.0±0.2 MeV. The decay schemes of114Pd,116Pd and118Pd include — respectively — two, two and four 0+→1+ Gamow-Teller beta transitions with logft values between 4.1 and 5.1. The strength of these transitions is discussed in terms of the extreme single particle shell model with pairing and the spherical proton-neutron quasiparticle random phase approximation. The possible role of deformation is considered using a shell correction method. Predictions for the decay properties of the as yet unobserved120Pd are given.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01299686

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5

Digitale Medien

The Gamow-Teller transitions in the96Pd→96Rh decay (1985)

Rykaczewski, K. ; Grant, I. S. ; Kirchner, R. ; [weitere]

Springer

The European physical journal 322 (1985), S. 263-270

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ISSN: 1434-601X

Schlagwort(e): 23.40.Hc ; 21.10.Dr ; 21.10.Pc ; 27.60.+j ; 29.30.Kv

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Using the40Ca(4.2 MeV/u) +60Ni reaction and on-line mass separation, the decay properties of 46 96 Pd50 were reinvestigated. From a comparison of experimental and theoreticalβ +/(EC +β +) probability ratios, theQ EC 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. For96Pd and94Ru the sources of this quenching are discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01411890

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6

Digitale Medien

β +-endpoint measurements near100Sn and146Gd (1991)

Keller, H. ; Kirchner, R. ; Klepper, O. ; [weitere]

Springer

The European physical journal 340 (1991), S. 363-370

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ISSN: 1434-601X

Schlagwort(e): 21.10.Dr ; 23.40.−s ; 27.60.+j

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract With a summation-free β+-endpoint spectrometer the β+-decay energies of104Sn,147Tb,148, 149Dy,149Ho,150Er, and151Tm were remeasured with improved accuracy. Combined with known proton and alpha decay energies, the resulting QEC values lead to atomic masses of very neutron-deficient isotopes including nuclei beyond the proton drip-line such as109I and113Cs. Furthermore, the Gamow-Tellerβ-strength of the even-even nuclei104Sn,148Dy, and150Er is reevaluated with reduced uncertainty.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01290323

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7

Digitale Medien

Gamow-Teller strength distribution in the beta-decay of100Ag from total-absorption gamma spectrometry (1995)

Batist, L. ; Bykov, A. ; Moroz, F. ; [weitere]

Springer

The European physical journal 351 (1995), S. 149-153

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ISSN: 1434-601X

Schlagwort(e): 21.10.−k ; 23.40.Hc ; 27.60,+j

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The EC/β+-decay of the odd-odd nucleus100Ag was studied by means of total absorptionγ-ray spectrometry. Most of the Gamow-Teller strength was found to be concentrated at an excitation energy of 5.6 MeV in100Pd, the FWHM of this resonance being 1.5 MeV. The measured strength distribution which is interpreted within the BCS approximation as being due to the dominant population of four-quasiparticle excitations, resembles the distribution predicted by an advanced shell-model calculation for the98Ag →98Cd decay.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01289525

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