Activation Cross Sections for 14.8-Mev Neutrons and Some New Radioactive Nuclides in the Rare Earth Region

Wille, R.; Fink, R.W.

doi:10.1103/physrev.118.242

Cited by 260 publications

(33 citation statements)

References 16 publications

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“…Markowitz et al [12] reported the isotope in 1954. Wille et al [13] confirmed the half-life by neutron activation analysis. The first extensive study was performed by Hoffman et al [14] in 1967 after chemical separation of fission products by column partition chromatography.…”

Section: The Decay Of 14scementioning

confidence: 70%

Nuclear spectroscopy of neutron-richA=145 nuclei

Schüßler¹,

Blachot²,

Monnand³

et al. 1978

Z Physik A

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A study of the fl-decay of neutron-rich A = 145 fission products was undertaken by the use of the two recoil separators LOHENGRIN and JOSEF and the ISOL-type separator OSTIS. The/?-decaying isotopes 145Ba, 145La and ~SCe were extensively studied. Level schemes for 145La, 14SCe and 14Spr were deduced from 7 and conversion electron spectra, 7 Y, X7 delayed and fi 7 coincidences. The Q~-values have been measured for the *4SBa, 145La and 145Ce decays.

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Section: The Decay Of 14scementioning

confidence: 70%

Nuclear spectroscopy of neutron-richA=145 nuclei

Schüßler¹,

Blachot²,

Monnand³

et al. 1978

Z Physik A

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“…There are, however, considerable difficulties in the decay study, because several nuclides with approximately same half-lives are produced simultaneously by neutron reactions on 17~ Short half-lives (a few minutes) also limit the use of mass and/or chemical separation. The difficulties are clearly demonstrated in the different half-lives (4.4 6 rain) previously reported for 167Dy [1][2][3]. In the present work we have investigated the decay of 16VDy by using a high-capacity two-parameter coincidence system and different kinds of detectors, including a X-ray detector.…”

Section: Introductionmentioning

confidence: 87%

States of167Ho from the decay of neutron rich nuclide167Dy

1977

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The/?--decay of 167T~ 661Jy produced through the fast neutron reaction 17~ ~)167Dy has been investigated by using several kinds of detectors and a high-capacity two-parameter recording system. The half-life and/?--decay energy of 167Dy were determined to be T~ = 6.20 + 0.08 rain and Q~_ = 2.35 -t-0.06 MeV, respectively. The observed level scheme of 167Ht ~67 -(completely unknown previously) contains 12 states, among them a 6.0_+ 0.1 gs M2 isomer at 259.

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“…Therefore, we have investigated the/?--decay of 152pm and have found [17] three isomers with half-lives of 4.2+0.2rain, 7.5+0.2min and 15.0+ 1.0min. Previous studies [18][19][20][21][22][23][24] on the decay of ~SZPm have reported only half-lives and a few ~,-rays, but discrepancies even existed in the half-lives. In the course of our investigations Daniels and Hoffman [25] have independently discovered three isomers of 152pm and have investigated their decay in some detail.…”

Section: Introductionmentioning

confidence: 89%

Decay of the 4.2-min152Pm into levels of152Sm

et al. 1975

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Abstract. After bombardments of enriched 152Sm with 14-MeV neutrons, three isomers of ~ s 2 Pm, produced by the (n, p) reaction, have been observed with half-lives of 4.2 _+ 0.2 min, 7.5+0.2min and 15.0+ 1.0 rain. Sources of pure 4.2-rain ~S2pm were obtained by separating the promethium from its parent ll-min 152Nd produced by thermal-neutron induced fission of 235U. The beta and gamma radiations of the 4.2-min 152pm have been investigated using semiconductor and scintillation spectrometers. Most of the y-ray transitions could be placed in a level scheme for ~SZSm. Especially interesting is a level at 1 083 keV for which the assignment U =0 + is proposed. In a 4g/~ 7 experiment, the ground state feeding of 152Sm in the /~--decay of the 4.2-rain ~52Pm has been measured to be 61 o/o of all/%ray transitions. A Q/j-value of 3.4 + 0.2 MeV has been obtained.

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Activation Cross Sections for 14.8-Mev Neutrons and Some New Radioactive Nuclides in the Rare Earth Region

Cited by 260 publications

References 16 publications

Nuclear spectroscopy of neutron-richA=145 nuclei

Nuclear spectroscopy of neutron-richA=145 nuclei

States of167Ho from the decay of neutron rich nuclide167Dy

Decay of the 4.2-min152Pm into levels of152Sm

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