Désintégration de 90Y. Transition o+ → o+ dans 90Zr. Terme de Fierz. I. Transition o+ → o+ dans 90Zr

Yuasa, Tosiko; Laberrigue-Frolow, J.; Feuvrais, L.

doi:10.1051/jphysrad:01957001808-9049800

Cited by 17 publications

(3 citation statements)

References 14 publications

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“…4 Zipoy et alh z reported a N 14 level at 9.51±0.02 Mev with T~40 kev from an analysis of the C lz (p,p)C lz reaction. Since the width of the 2.11-Mev (p,y) resonance is almost entirely due to the (p,p) reaction, it is apparent from the agreement in energy 9.50-Mev level observed in the C 13 (£, T )N 14 reaction with a 12-kev thick, 70% enriched C 13 target. The resonance curve was obtained with a single-channel analyzer set to count y rays with energies between 3 and 5.5 Mev.…”

Section: A Decay Of the 950-mev Levelmentioning

confidence: 85%

“…platinum backing. 9 The target profile was measured at the narrow (r=100 ev) 10 1.76-Mev C 13 (^,7)N 14 resonance and the target was found to be nonuniform with an average thickness for 1.76-Mev protons of 45 kev (^60 kev for 1.47-Mev protons) and a maximum thickness of approximately 100 kev. All the experiments on the 2.1-Mev resonance were done with the thinner target while the experiments on the 1.47-Mev resonance were carried out with both targets.…”

Section: A Apparatusmentioning

confidence: 99%

“…However, the relative reduced widths obtained from the proton widths of the N 14 levels give some indication that the odd-parity T=l states under consideration are not completely describable as pure 2s% or d% states with the ground state of C 13 as their only parent. Assuming that these odd-parity states contain contributions from s 4 p 9 2s and s A p 9 d only, it seems reasonable that admixtures of d\ coupled to the C 13 ground state and 2s\ and d% coupled to the 7 7r =f~ first excited state of s A p 9 are more likely than admixtures of d\ coupled to the J r =%~ first excited state of s 4 p 9 . The fact that the J 7r =0~ and 3~ N 14 states have larger relative reduced widths than the J v =l~~ and 2~ N 14 states, respectively, is consistent with this argument.…”

Section: Comparison Of the C 14 And N 14 Levelsmentioning

confidence: 99%

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C13(p, γ)N141.47- and 2.11-Mev Resonances and

1959

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DAY, MILLS, PERRY, AND SCHERBanalyses explain fairly successfully all nucleon-nucleon interactions up to several hundred Mev in terms of central, tensor, and spin-orbit forces that are derived from potentials with a Yukawa shape and a hard central core 19 or from the Gartenhaus potential plus a spinorbit potential. 20 A study has been made of the y rays emitted by the 8.9-and 9.5-Mev levels of N 14 using the C 13 (£/y)N 14 reaction at the 1.47and 2.11-Mev resonances. The decay schemes of these levels were reinvestigated using a three-crystal pair spectrometer, Nal(Tl) single-crystal measurements, and standard y-7 coincidence techniques. The anisotropics relative to the bombarding beam of most of the observed y transitions were measured using the threecrystal pair spectrometer. The angular distributions of some of the y transitions were measured using a single Nal(Tl) crystal. Measurements were made of the Doppler shifts of the ground state decay of the N 14 5.10-Mev level and the cascade from the N 14 5.83-Mev level to the N 14 5.10-Mev level. From these Doppler shift measurements the mean lifetime of the N 14 5.83-Mev level was found to be in the range (5-65)X 10"~1 4 sec; while an upper limit of 3X10" 13 sec was set on the mean life of the N 14 5.10-Mev level. The results of the study of the y decay of the N 14 9.5-and

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Section: A Decay Of the 950-mev Levelmentioning

confidence: 85%

Section: A Apparatusmentioning

confidence: 99%

Section: Comparison Of the C 14 And N 14 Levelsmentioning

confidence: 99%

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C13(p, γ)N141.47- and 2.11-Mev Resonances and

1959

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A = 90 - 94

Way¹,

Gove²,

McGinnis³

et al.

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

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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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Désintégration de 90Y. Transition o+ → o+ dans 90Zr. Terme de Fierz. I. Transition o+ → o+ dans 90Zr

Cited by 17 publications

References 14 publications

C13(p, γ)N141.47- and 2.11-Mev Resonances and

C13(p, γ)N141.47- and 2.11-Mev Resonances and

A = 90 - 94

1956 - 1958

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