Studies of Low-Lying Levels of Erbium and Tungsten Isotopes with (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>d</mml:mi><mml:mo>,</mml:mo><mml:mi>p</mml:mi></mml:math>) Reactions

Isoya, A.

doi:10.1103/physrev.130.234

Cited by 42 publications

(4 citation statements)

References 7 publications

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“…1 After the decay of the 75-day Tb 160 simultaneously produced in this irradiation, y radiation accompanying the electron-capture decay of long-lived Tb 158 has been reported. 2,3 In order to distinguish possible y radiations of Tb 157 from those of Tb 158 in our sample, it has been necessary to carry out an electromagnetic isotope separation of these two isotopes. This separation has been carried out using the electromagnetic-isotope-separator facility at the Bohr Institute for Nuclear Physics.…”

mentioning

confidence: 99%

“…The K x rays arising from the electron capture of Tb 157 have been observed in this sample. 2 In the intervening period, two studies have been made of the K and L x-ray spectra accompanying the decay of Tb 157 . Bhat and Pool 4 have reported an Li-to-K capture ratio of 2.64 and deduced a decay energy of 60 keV, while Fujiwara et al b ' 6 have reported an Lj-to-K capture ratio of 2.18 and deduced a decay energy of 60 keV.…”

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confidence: 99%

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Decay of Terbium-157

Naumann¹,

Hopke²

1967

Phys. Rev.

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Samples of Tb 157 have been prepared by irradiating enriched Dy 156 in the Materials Testing Reactor. After irradiation, the Tb 167 samples have been prepared by ion exchange separation and the use of the Bohr Institute's electromagnetic isotope separator. The Li-to-K electron-capture ratio has been determined as 2.65±0.20 using a beryllium-windowed sodium iodide spectrometer. This value is comparable to previous determinations. It implies a Q value for electron capture to the ground state of Gd 157 of 66=1=6 keV which also permits electron capture to the first excited state at 54 keV. A search has been made for photons of this energy using a germanium semiconductor detector having an energy resolution of 0.75 keV. Photons having 54.35=1=0.05 keV have been observed in Tb 157 sources. Using the measured photon intensity and the intensity of the K x rays, a branching ratio of (0.34=bO.2)% is calculated for electron capture to the first excited state.

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confidence: 99%

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confidence: 99%

Decay of Terbium-157

Naumann¹,

Hopke²

1967

Phys. Rev.

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“…[2][3][4] However, the short half-life restricts its applicability to laboratories not too far from a reactor. We would like to point out that despite the smaller effect obtained with sources of the 33-day activity, this activity can be used to good advantage in many cases.…”

Section: Relative Merits Of the 33-day Te 129w And 70-min Te 129 Actimentioning

confidence: 99%

“…So far only a few angular distributions have been published, [1][2][3][4] and none of these have been compared with the predictions of the distorted-wave Born approximation (DWBA) theory utilizing measured distortion parameters. In view of the large static deformation of the rare-earth and the actinide nuclei, such a test of the DWBA theory seems of interest, since one might expect inelastic-scattering (strong coupling)…”

Section: Introductionmentioning

confidence: 99%

27.7-keV Level inI129and Some Remarks about Its Use in Mössbauer Experiments

Sanders

Waard

1966

Phys. Rev.

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The properties of the first excited state of I m have been studied with a mass-separated Te 129m source. The energy of this state, as determined from the conversion-electron spectrum, is JS 7 =27.72d=0.06 keV. This differs considerably from the often quoted value of 26.8 keV, but it agrees very well with the value recently published by Bemis and Fransson. An accurate half-life value ri/ 2 =16.8±0.2 nsec was determined from delayed /3e~ coincidences. A total conversion coefficient a=5.3±0.3 was obtained from the relative intensities of the 27.7-keV gamma rays and the 27.4-keV x rays that accompany the isomeric transition in Te m . The contributions of these rays were separated by comparing Mossbauer spectra obtained with the 70-min and 33-day activities of Te 129 . Some remarks are made about the relative merits of these activities for use in Mossbauer sources.

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Nuclear Data Sheets for A = 171

Baglin

2002

Nuclear Data Sheets

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Studies of Low-Lying Levels of Erbium and Tungsten Isotopes with (d,p) Reactions

Cited by 42 publications

References 7 publications

Decay of Terbium-157

Decay of Terbium-157

27.7-keV Level inI129and Some Remarks about Its Use in Mössbauer Experiments

Nuclear Data Sheets for A = 171

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