Collective levels in the even isotopes of Cd and Te

The decay schemes of the 5.7-min and 40-min 130 Sb isomers separated from 235 U fission products were studied using Ge(Li) detectors in singles and coincidence studies. Twentyfive γ rays have been assigned to the decay of the 40-min isomer and 4 of these plus 12 new γ rays have been assigned to the decay of 5.7-min isomer. 2876 keV. The levels are compared with those from reaction studies and the systematics of the even-A tellurium levels is discussed. ZusammenfassungDie Zerfallsschemata der von 235 U-Spaltprodukten abgetrennten 5,7-min-und 40-min-Isomeren von 130 Sb wurden mit Hilfe von Ge(Li)-Detektoren in Einfach-und Koinzidenzmessungen untersucht. Fünfundzwanzig Gammastrahlen wurden dem Zerfall des 40-min-Isomers und vier derselben zuzüglich zwölf neuer Gammastrahlen dem Zerfall des 5,7-min-Isomers zugeteilt. Die Niveaus in 130 Te wurden bei 839,und 2876 keV festgestellt. Die Niveaus werden mit den durch Reaktionsstudien ermittelten Niveaus verglichen. Die Systematik der Tellurniveaus mit geradem A wird behandelt. RésuméEn utilisant des détecteurs Ge(Li) pour des mesures directes ou par coincidence, on a étudié les schémas de désintégration des isomères de 5,7 mn-et de 40 mn-du 130 Sb séparés des produits de fission du ^U. On a pu attribuer à la désintégration de l'isomère 40 mn-25 rayonnements γ, et 4 d'entre eux plus 12 nouveaux rayonnements γ à la désintégration de l'isomère 5,7 mn-. On a trouvé les niveaux du 180 Te aux valeurs suivantes : keV. Ces niveaux sont comparés à ceux obtenus dans des études de réactions, et la systématique des niveaux du tellure de nombre de masse A pair est discutée.

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“…Fig. 6 nuclear excitation studies [19][20][21][22][23]. No β feeding was found to this level in the decay of either isomers.…”

Section: Assignments Of Spins and Paritiesmentioning

confidence: 94%

Decay of 5.7-minutes and 40-minutes ¹⁸⁰Sb Isomers to Levels in ¹⁸⁰Te

Erten

Blachot²

1974

Radiochimica Acta

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“…tion measurements with a particles 4 ' 5 and oxygen ions, 6 ' 7 inelastic proton scattering, 8,9 deuteron stripping and pickup reactions, 10 and from 7-ray and internal conversion spectra 11-14 following slow neutron capture in Cd 113 . A summary of the known information for levels below 2-MeV excitation is given in Fig.…”

Section: Acknowledgmentsmentioning

confidence: 99%

“…J. Phys. 35, 1159 (1957 8 Faessler, 9 coupling the odd nucleon to a rotating and vibrating deformed core, and taking into account the rotation-vibration interaction, calculated transition probabilities for the 646-and 718-keV levels under the assumption that they were part of the i£=f-2 = | band. He compared his results with the transition probabilities calculated on the basis of the assumption 5 that the 646-keV state is the intrinsic [400] ^+ Nilsson state.…”

Section: Introductionmentioning

confidence: 99%

Nuclear Resonance Fluorescence inRe185

Metzger¹

1967

Phys. Rev.

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The resonant scattering of y rays from the 646-, 718-, and 874-keV excited states of Re 185 has been observed with Nal as well as with Ge(Li) detectors. An Os 185 source, moving on the periphery of a fast rotor at speeds of up to 1.3 X10 5 cm/sec, provided the resonant y rays. From the magnitude of the scattering effects, values of gT Q 2 /T= (2.37±0.15)XH)-5 , (4.8±1.0)XK)-5 , and (2.7±0.3)X10-4 eV were obtained for the widths of these levels, respectively. The angular distributions of the resonance radiations were found to be consistent with the previously accepted spin assignments of J to the 646-keV level, f to the 718-keV leve], and J or f to the 874-keV level. A comparison of resonance scattering and Coulomb-excitation cross sections made it possible to eliminate spin J for the 874-keV level. A value 1.18±0.06 was measured for the ratio of the intensities of the 874-and 879-keV y rays emitted in the disintegration of Os 185 . Evidence for the existence of a level in Re 185 at 929±2 keV was obtained, and upper limits of 0.2% of the ground-state transitions were established for the branchings from the 874-and 879-keV levels to the j + first excited state.The energies and angular distributions of proton groups produced in the Cd 113 (d,p) Cd 114 reaction were measured with an over-all resolution of 12 keV. A distorted-wave analysis, employing experimentally determined optical-model parameters, was used to extract values of /" and spectroscopic strengths for states up to 3.8-MeV excitation in Cd 114 . The spectroscopic factors of the low-energy states are compared with those predicted by a microscopic theory of nuclear vibrations. Reasonable agreement is found for the ground and one-quadrupole-phonon states, but not for the two-phonon states.

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“…2,3 The half-life of Po 203 has been reported as 42 4 and 47 min 2 ; again only a small a branch (0.02%) occurs. 5 The ground-state spins of all three of these Bi isotopes have been measured as f with negative parity inferred, while the Po ground states have been found 6 to have spins and parities f-. A level scheme for Bi 207 has previously been determined from Po 207 decay 7 by means of conversionelectron spectra using a magnetic spectrometer and by 7 spectra using a Nal(Tl) scintillation spectrometer.…”

Section: Introductionmentioning

confidence: 99%

“…25, 874 (1961);26, 1034(1962. 6 1. Lindgren, in Alpha-, Beta-, and Gamma-Ray Spectroscopy, edited by K. Siegbahn (North-Holland Publishing Co., Amsterdam, 1965), Appendix 4, Table of Nuclear Spins and Moments.…”

Section: Introductionmentioning

confidence: 99%

Levels inBi203,Bi205, and
Hopke
¹
,
Naumann
²
,
Spejewski
³

1969
Phys. Rev.

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The decay of the odd-mass isotopes of polonium to levels in Bi 203 , Bi 205 , and Bi 207 have been studied. Isotopically separated sources have been produced in the Princeton-Pennsylvania accelerator and massdispersed by means of the Princeton electromagnetic isotope separator. 7-ray and conversion-electron spectra have been observed. With the aid of 7-7 coincidences, level schemes have been constructed for these three bismuth isotopes.

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Collective levels in the even isotopes of Cd and Te

Cited by 72 publications

References 27 publications

Decay of 5.7-minutes and 40-minutes ¹⁸⁰Sb Isomers to Levels in ¹⁸⁰Te

Decay of 5.7-minutes and 40-minutes ¹⁸⁰Sb Isomers to Levels in ¹⁸⁰Te

Nuclear Resonance Fluorescence inRe185

Levels inBi203,Bi205, and
Hopke
¹
,
Naumann
²
,
Spejewski
³

1969
Phys. Rev.

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Collective levels in the even isotopes of Cd and Te

Cited by 72 publications

References 27 publications

Decay of 5.7-minutes and 40-minutes 180Sb Isomers to Levels in 180Te

Decay of 5.7-minutes and 40-minutes 180Sb Isomers to Levels in 180Te

Nuclear Resonance Fluorescence inRe185

Levels inBi203,Bi205, andHopke1, Naumann2, Spejewski3 1969Phys. Rev.

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Decay of 5.7-minutes and 40-minutes ¹⁸⁰Sb Isomers to Levels in ¹⁸⁰Te

Decay of 5.7-minutes and 40-minutes ¹⁸⁰Sb Isomers to Levels in ¹⁸⁰Te

Levels inBi203,Bi205, and
Hopke
¹
,
Naumann
²
,
Spejewski
³

1969
Phys. Rev.