New Isotopes:<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Er</mml:mi></mml:mrow><mml:mrow><mml:mn>172</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Tm</mml:mi></mml:mrow><mml:mrow><mml:mn>172</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>

Nethaway, D.R.; Michel, M.C.; Nervik, W.E.

doi:10.1103/physrev.103.147

Cited by 18 publications

(6 citation statements)

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“…This half-life agrees with the currently adopted value of 3.17 149 Tm "Observation of 149 Tm decay to 149 Er levels and β-delayed proton emission" reported the discovery of 149 Tm in 1987 by Toth et al [101]. An enriched 94 Mo target was bombarded with a 259 MeV 58 Ni beam from the Berkeley SuperHILAC and 149 Tm was formed in the fusion-evaporation reaction 94 Mo( 58 Ni,p2n). Reaction products were separated with the OASIS on-line mass separator and γ-rays, X-rays and positrons were measured.…”

Section: Tmsupporting

confidence: 86%

“…150 Tm "Very proton rich nuclei with N≈82" was published in 1982 by Nolte et al documenting the observation of 150 Tm [24]. 58 Ni beams of energies between 233 and 250 MeV from the Munich MP tandem and heavy-ion linear rf post accelerator were used to bombard 94 Mo targets forming 150 Tm in the fusion-evaporation reaction 94 Mo( 58 Ni,np). Gamma-ray singles and coincidences were measured with coaxial and planar Ge(Li) detectors.…”

Section: Tmmentioning

confidence: 99%

“…"This activity was consequently assigned to the new isotope 150 Tm. This isotope was produced through the reaction 94 Mo( 58 Ni,np). The decay curve of the 207.5 keV line after 6 s irradiations is plotted in [the figure].…”

Section: Tmmentioning

confidence: 99%

“…The measured half-life for this 171 Tm isomer agrees with the currently adopted value of 2.60(2) µs. The first observation of the long-lived ground-state was reported in the same year as a conference abstract[122] and only seven years later in the refereed literature[123].The discoveries of 172 Tm was announced in 1956 by Nethaway et al in the paper "New isotopes: Er 172 and Tm 172 "[94]. Erbium oxide was irradiated with neutrons from the Idaho Materials Testing Reactor, and 172 Tm was populated by β-decay from 152 Er which was formed by sequential neutron capture from 170 Er.…”

mentioning

confidence: 99%

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Discovery of dysprosium, holmium, erbium, thulium, and ytterbium isotopes

Fry

Thoennessen

2013

Atomic Data and Nuclear Data Tables

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Section: Tmsupporting

confidence: 86%

Section: Tmmentioning

confidence: 99%

Section: Tmmentioning

confidence: 99%

mentioning

confidence: 99%

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Discovery of dysprosium, holmium, erbium, thulium, and ytterbium isotopes

Fry

Thoennessen

2013

Atomic Data and Nuclear Data Tables

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“…Gamma rays of energies 0.076, 0.18, 0.40, 1.09, 1.49, and 1.79 Mev have been observed following the f3r decay of the 64-hour Tm 172 activity. 9 Recently the enriched isotopes of ytterbium have become available and it is the purpose of this paper to discuss the results of an investigation of the activity of Lu 172 produced by proton irradiations of the enriched isotopes of ytterbium. In order to determine the mass number of the activity, similar proton irradiations were performed on each of the other enriched stable isotopes of ytterbium and the resulting activities intercompared.…”

Section: Introductionmentioning

confidence: 99%

Radioactive Decay ofLu172

Wilson

Pool

1960

Phys. Rev.

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Ytterbium oxide enriched to 95.9% in mass number 172 was irradiated with 6-Mev protons. An activity decaying by electron capture with a half-life of (6.70±0.04) days was produced and its assignment to Lu 172 confirmed by the identification of the ytterbium K x ray and by comparison with the activities produced by similar proton irradiations of the other enriched isotopes of ytterbium. The 4.0-hour positron activity previously assigned to Lu 172 was not observed and is best attributed to an impurity. The observed activity of Lu 172 consists of the L and K x rays of ytterbium and gamma rays with energies of 79, 91, 113, 182, 203, 270, 324, 373, 490, 527, 697, 809, 900, 912, 1093, 1402, and 1583 kev. Because no positron radiation exists in the activity of Lu 172 , the mode of decay is solely by electron capture to Yb 172 . Gammagamma coincidence measurements, energy considerations, and consideration of the relative numbers of the radiations observed in the activity of Lu 172 have led to the assignment of energy levels at 530 kev in Yb 172 in addition to the previously known 78.7 (2+)-and 260.2 (4+)-kev levels. The positions of all of the observed radiations and some observed only in conversion electron measurements are shown in a proposed energy level scheme for the decay of Lu 172 . Approximate branching ratios for the electron capture disintegrations of Lu 172 are also shown in the level scheme. Few, if any, electron capture transitions of Lu 172 occur to the ground and first excited states of Yb 172 . Of the two predicted spins for the ground state of Lu 172 , 4-is more consistent with the proposed energy level scheme.

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1956 - 1958

Way¹,

Gove²,

McGinnis³

et al.

Energy Levels of Nuclei: A = 5 to a = 257

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This article reviews Binary Tense theory as developed by Verkuyl (2008) on the basis of three oppositions proposed by Te Winkel (1866): present-past, synchronous-posterior and imperfect-perfect. Verkuyl followed Te Winkel in assuming that the verb zullen ('will') can be used as a temporal auxiliary expressing posteriority, but here it will be argued that zullen should be considered a purely modal verb and thus does not contribute to the temporal meaning of the clause. The notion of posteriority is, in fact, an integral part of the meaning of past and present, and can be brought to the fore by the use of temporal adverbs like morgen 'tomorrow' or by pragmatic considerations. The article discusses several proposals in the Dutch linguistic literature in which the modal nature of zullen is recognized, but they fail to be convincing in the absence of a crucial innovation: the rejection of the point of speech n as the present in favor of assuming a present tense domain in which n is a moving point that splits the actualized part of the present from its non-actualized (modal) part. • 1 Introductie Voorzover ons bekend, is L.A. te Winkel (1810-1868) de eerste geweest die voorstelde om het Nederlandse tempussysteem te beschrijven in termen van drie binaire opposities: (1) a. Heden (PRES) vs. Verleden (PAST) b. Synchroon (SYN) vs. Posterieur (POST) c. Imperfect (IMP) vs. Perfect (PERF) Te Winkel (1866) hanteert niet de primaire driedeling Verleden-Heden-Toekomst die gebruikelijk is geworden in de taaltheoretische en logisch-semantische traditie gebaseerd op Reichenbach (1947) en die in zijn tijd ook al bestond in gebruiksgrammatica's en in * Henk Verkuyl is als emeritus hoogleraar verbonden aan de Universiteit Utrecht (email: H.J.Verkuyl@uu.nl). Hans Broekhuis is als onderzoeker verbonden aan het Meertens instituut te Amsterdam (hans.broekhuis@ meertens.knaw.nl). We willen de gastredactie en de beoordelaars van dit artikel bedanken voor hun commentaar dat ons in staat heeft gesteld onze presentatie op verschillende punten te verhelderen. Temporaliteit en modaliteit 307 de taalkundige vakliteratuur: Weiland (1805), Bilderdijk (1826), Kollewijn (1892), Den Hertog (1903), om maar enkele Nederlandse driedelers te noemen. Te Winkels keuze voor een binair systeem was toen ook al opvallend. De driedeling sluit als vanzelfsprekend aan op onze intuïties over hoe tijd zich het best laat ordenen op basis van onze dagelijkse ervaringen ermee: we praten over dingen uit het verleden, in het heden en in de toekomst. Desondanks stelt Te Winkel dat de voornaamste indeling van de Nederlandse tempusvor-men die is tussen Heden en Verleden, waarmee de rol van het Futurum als tempusvorm secundair wordt. Verkuyl (2012) is een korte samenvatting van Te Winkels systeem zoals dat formeel-semantisch gemoderniseerd is in Verkuyl (2008). In deze formalisering worden elementen die systematisch bijdragen aan het tempussysteem uitgedrukt door de operatoren die in (1) per oppositie staan vermeld. Voor elk van de zes operatoren geldt dat hij staat vóór ee...

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New Isotopes:Er172andTm172

Cited by 18 publications

References 0 publications

Discovery of dysprosium, holmium, erbium, thulium, and ytterbium isotopes

Discovery of dysprosium, holmium, erbium, thulium, and ytterbium isotopes

Radioactive Decay ofLu172

1956 - 1958

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