The decay scheme of 64Cu

Christmas, P.; Judge, Steven; Ryves, T.B.; Smith, David L.; Winkler, Gerhard

doi:10.1016/0167-5087(83)90470-2

Cited by 28 publications

(9 citation statements)

References 23 publications

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“…As shown in the figure, with the exception of Ref. [47], all of these measurements agree well with each other. The apparent deviation of the AME1995 mass excess is due to a change of almost 4 keV in the mass excess of 64 Cu between 1995 and today.…”

supporting

confidence: 77%

“…The mass of the stable 64 Zn was previously determined mainly by a measurement of the negatron energy spectrum in the radioactive decay of 64 Cu (T 1/2 = 12.7 h) (1983Ch47 [47]). Radioactive copper was obtained by irradiating a high-purity metallic Cu sample of natural isotopic composition at a nuclear reactor, and the β spectrum was then recorded with the doublefocusing spectrometer at the National Physical Laboratory in Teddington (UK).…”

mentioning

confidence: 99%

“…The spectrometer was calibrated with K conversion electrons in 137 Ba from a 137 Cs source. The β [47] endpoint was extracted with standard Fermi-Kurie analysis. The connection has since become primary owing to other data involving 64 Cu and is in moderate disagreement with these (1.6σ deviation).…”

mentioning

confidence: 99%

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High-precision masses of neutron-deficient rubidium isotopes using a Penning trap mass spectrometer

et al. 2007

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The atomic masses of the neutron-deficient radioactive rubidium isotopes [74][75][76][77]79,80,83 Rb have been measured with the Penning trap mass spectrometer ISOLTRAP. Using the time-of-flight cyclotron resonance technique, relative mass uncertainties ranging from 1.6 × 10 −8 to 5.6 × 10 −8 were achieved. In all cases, the mass precision was significantly improved as compared with the prior Atomic-Mass Evaluation; no significant deviations from the literature values were observed. The exotic nuclide 74 Rb, with a half-life of only 65 ms, is the shortest-lived nuclide on which a high-precision mass measurement in a Penning trap has been carried out. The significance of these measurements for a check of the conserved-vector-current hypothesis of the weak interaction and the unitarity of the Cabibbo-Kobayashi-Maskawa matrix is discussed.

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supporting

confidence: 77%

mentioning

confidence: 99%

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High-precision masses of neutron-deficient rubidium isotopes using a Penning trap mass spectrometer

et al. 2007

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“…This reaction is insensitive to low-energy neutrons because of its high-threshold energy. The 64 Cu activity was identified and measured by detecting gamma rays of 1345.8 keV with a known intensity (I γ = 0.471 ± 0.011% per decay) [13].…”

Section: Neutron Detectorsmentioning

confidence: 99%

Activation cross sections for reactions induced by 14 MeV neutrons on natural tin and enriched¹¹²Sn targets with reference to¹¹¹In productionviaradioisotope generator¹¹²Sn(n, 2n)¹¹¹Sn →¹¹¹In

Běták¹,

Mikołajczak²,

Staniszewska³

et al. 2005

Radiochimica Acta

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Activation cross sections / Ge detector / Neutron-induced reactions / γ -ray spectroscopy / Tin region / Neutron generatorSummary. We measured activation cross sections via γ -ray spectroscopy using high-purity germanium detectors for 16 reactions induced by (14.4 ± 0.2) MeV neutrons on isotopes of tin. The cross sections are: σ( 112 Sn(n, 2n) 111 Sn) = (1104 ± 43) mb, σ( 112 Sn(n, p) 112m In) = (33.6 ± 2.1) mb, σ( 112 Sn(n, p) 112g In) = (42.7 ± 3.1) mb, σ( 114 Sn(n, 2n) 113 Sn) = (1270 ± 115) mb, σ( 114 Sn(n, p) 114m2 In) = (20.5 ± 1.1) mb, σ( 115 Sn(n, p) 115m In) = (35.2 ± 2.6) mb, σ( 116 Sn(n, p) 116m2 In) = (11.1 ± 0.5) mb, σ( 117 Sn(n, n p) 116m2 In) = (1.35 ± 0.11) mb, σ( 117 Sn(n, p) 117m In) = (4.5 ± 0.4) mb, σ( 117 Sn(n, p) 117g In) = (12.8 ± 0.7) mb, σ( 117 Sn(n, n ) 117m Sn) = (246 ± 21) mb, σ( 118 Sn(n, 2n) 117m Sn) = (816 ± 70) mb, σ( 118 Sn(n, α) 115g Cd) = (1.26 ± 0.16) mb, σ( 120 Sn(n, α) 117m Cd) = (0.27 ± 0.04) mb, σ( 120 Sn(n, α) 117g Cd) = (0.29 ± 0.06) mb and σ( 124 Sn(n, 2n) 123m Sn) = (590 ± 26) mb.Two 112 Sn targets enriched to 62.5% and 84%, respectively, were used for these measurements in addition to the natural tin. The cross sections were compared with experimental data found in the literature, with published empirical formulae and with model calculations including also the pre-equilibrium contribution. For reactions which do not involve protons from below the closed Z = 50 shell, the agreement to the data is reasonable, it is somewhat weaker for the (n, p) reactions and still worse in the case of (n, α), where, however, the pre-equilibrium component is not described properly by the models included so far. The possibility of production of 111 Sn → 111 In generator system is considered.

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“…3) Determinação das probabilidades de emissão gama por decaimento destes radionuclídeos por meio de medidas absolutas e em espectrômetro de HPGe calibrado. (CHRISTMAS et al, 1983;KAWADA, 1986) como os mais recentes (QAIM, et al, 2007;WANKE et al;LUCA, et al, 2012;AMIOT, et al, 2012;SAHAGIA, et al, 2012;BÉ, et al, 2012;HAVELKA and SOCHOROVÁ , 2014;PIBIDA et al, 2017) (VOLKERT et al, 1991;NIJSEN et al, 2001;BREITZ et al, 2006;COSTA, 2008;LIBERAL, 2013;RANJBAR et al, 2015;ZOLGHADRI et al, 2015;TEHRANI, 2016 (OKUNO e YOSHIMURA, 2010;KRANE, 1988).…”

Section: Introductionunclassified

Padronização em sistema primário por coincidências 4πβ-γ e determinação das intensidades de emissão gama por decaimento dos radionuclídeos Cu-64 e Ho-166

Yamazaki¹

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AGRADECIMENTOSÀ Dra. Marina Fallone Koskinas, orientadora deste trabalho, um agradecimento muito especial, pelo seu apoio, atenção, parceria e disponibilidade constante, pela confiança em mim depositada e pelos conhecimentos transferidos durante o desenvolvimento desta tese. Ao Laboratório de Metrologia Nuclear (LMN), na pessoa do Dr. Mauro da Silva Dias, pelo valioso, essencial suporte técnico oferecido no decorrer deste trabalho. Aos colegas de operação do reator IEA-R1, nas irradiações efetuadas. Aos colegas do Laboratório de Metrologia Nuclear que de alguma forma colaboraram no bom andamento e execução deste trabalho. Aos meus pais, José Yamazaki e Makina Yamazaki, (em memória), que sempre apoiaram e incentivaram com muita determinação os meus anos de estudo, aproveito esta oportunidade para novamente agradecê-los por tudo, onde eles estiverem. , que mesmo tão distantes, pelos conselhos, incentivo e torcida constantes. Ao Valmiro Guilherme de Santana, pelo seu cuidado, carinho, estímulo e suporte pessoal contínuo, que me fizeram superar os obstáculos. Ao Instituto de Pesquisas Energéticas e Nucleares, na pessoa do Superintendente Dr. Wilson Aparecido Parejo Calvo, pela oportunidade oferecida.A todos que direta ou indiretamente colaboraram na execução e realização deste trabalho. RESUMO YAMAZAKI, I.M. Padronização em sistema primário por coincidências 4e determinação das intensidades de emissão gama por decaimento dos radionuclídeos 64 Cu e 166 Ho. 2019. 150 p. Tese (Doutorado em Tecnologia Nuclear), Instituto de de 0,472 (10) % apresentando um bom acordo com os dados da literatura. A probabilidade de emissão gama por decaimento do fóton gama de 1379,45 keV do 166 Ho foi de 0,936 (4) %. Por meio destas medidas foi possível também a determinação das intensidades relativas de outros fótons emitidos por este radionuclídeo. Os resultados obtidos foram concordantes com a literatura dentro da incerteza experimental. Palavras chaves: Padronização primária do 64 Cu e 166 Ho, sistema de coincidências 4(PC)- , probabilidade de emissão gama ABSTRACT YAMAZAKI, I.M. Primary standardisation of 64 Cu and 166 Ho radionuclides in the 4PC coincidence system and determination of its gamma-ray emission probability per decay . 2019. 150 p. Tese (Doutorado em Tecnologia Nuclear), Instituto de Pesquisas Energéticas e Nucleares, São Paulo. The procedure followed by the Nuclear Metrology Laboratory (LMN) at the Nuclear and EnergyResearch Institute (IPEN) for the primary standardization of 64 Cu and 166 Ho is described. These radionuclides are widely applied to Nuclear Medicine such as in diagnostic investigations and in radiotherapy. The absolute activity of both radionuclides were determined by the efficiency extrapolation method applied to 4(PC)- coincidence counting system using a proportional counter in 4 geometry coupled with NaI(Tl) scintillation counter. The primary standardisation of 64 Cu for the conventional coincidence counting, the events were registered using a Time to Amplitude Converter (TAC) system a...

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The decay scheme of 64Cu

Cited by 28 publications

References 23 publications

High-precision masses of neutron-deficient rubidium isotopes using a Penning trap mass spectrometer

High-precision masses of neutron-deficient rubidium isotopes using a Penning trap mass spectrometer

Activation cross sections for reactions induced by 14 MeV neutrons on natural tin and enriched¹¹²Sn targets with reference to¹¹¹In productionviaradioisotope generator¹¹²Sn(n, 2n)¹¹¹Sn →¹¹¹In

Padronização em sistema primário por coincidências 4πβ-γ e determinação das intensidades de emissão gama por decaimento dos radionuclídeos Cu-64 e Ho-166

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The decay scheme of 64Cu

Cited by 28 publications

References 23 publications

High-precision masses of neutron-deficient rubidium isotopes using a Penning trap mass spectrometer

High-precision masses of neutron-deficient rubidium isotopes using a Penning trap mass spectrometer

Activation cross sections for reactions induced by 14 MeV neutrons on natural tin and enriched112Sn targets with reference to111In productionviaradioisotope generator112Sn(n, 2n)111Sn →111In

Padronização em sistema primário por coincidências 4&pi;&beta;-&gamma; e determinação das intensidades de emissão gama por decaimento dos radionuclídeos Cu-64 e Ho-166

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Activation cross sections for reactions induced by 14 MeV neutrons on natural tin and enriched¹¹²Sn targets with reference to¹¹¹In productionviaradioisotope generator¹¹²Sn(n, 2n)¹¹¹Sn →¹¹¹In

Padronização em sistema primário por coincidências 4πβ-γ e determinação das intensidades de emissão gama por decaimento dos radionuclídeos Cu-64 e Ho-166