The Disintegration of Ruthenium 103 and Palladium 103

Mei, Jia‐Wei; Huddleston, C. M.; Mitchell, Allan C. G.

doi:10.1103/physrev.79.429

Cited by 25 publications

(4 citation statements)

References 7 publications

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“…Thus, about 26 isotopes have yet to be discovered corresponding to 41% of all possible palladium isotopes. Figure 1 summarizes the year of first discovery for all palladium isotopes identified by the method of discovery.…”

Section: Discovery Of 91−128 Pdmentioning

confidence: 99%

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Discovery of palladium, antimony, tellurium, iodine, and xenon isotopes

Kathawa

Fry

Thoennessen

2013

Atomic Data and Nuclear Data Tables

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Section: Discovery Of 91−128 Pdmentioning

confidence: 99%

“…In 1950 Mei et al described the observation of 103 Pd in "The disintegration of ruthenium 103 and palladium 103" [26]. A rhodium metal target was bombarded with 23-MeV α-particles from the Indiana University cyclotron.…”

Section: Pdmentioning

confidence: 99%

Discovery of palladium, antimony, tellurium, iodine, and xenon isotopes

Kathawa

Fry

Thoennessen

2013

Atomic Data and Nuclear Data Tables

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“…72As decays to 72Ge by positron emission and electron capture. The relative intensities of the five positron groups as determined by Mei, Mitchell and Huddleston (1950) are given in table 1. Brun, Kraushaar and Xleyerhof (1956) combined part of these data with their measurements on the gamma and x-radiation resulting from the decay of 72L4s, and proposed a decay scheme in which 77.…”

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confidence: 99%

The Calculation of Absorbed Tissue Doses from Arsenic-72

Turner

1962

Phys. Med. Biol.

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THE technique of localizing brain tumours by using a positron emitting nuclide has been largely developed by Brownell (1955) andSweet, Mealey, Brownell andAronow ( 1959). Single doses of 2-3 mc per 70 kg body-weight of 17.5 day '"4s are injected intravenously in order to obtain the positron coincidence scans.The absorbed radiation doses delivered to various organs have been calculated for 7 4 3 s by Mealey, . This note describes the calculations that have been made to estimate the absorbed radiation doses delivered t o various organs by 72As (26 hr half-life) compared with 74As. 0 2 . JfETHOD 72As and 749s are produced in the M.R'.C. cyclotron at Hammersmith Hospital, and both have been used to detect brain tumours using coincidence counting of the annihilation gamma radiation (Turner, D'Arcy, Mallard and Fowler 1961;Mallard, Fowler and Sutton 1961). Each nuclide is prepared as a mixture of arsenate and arsenite at a specific activity of 3 t o 15 mc per milligram of stable arsenic at the time of administrat'ion. It is injected intravenously in a sterile solution isotonic with normal saline. Investigations in rats with tumours by C. M. E.Matthews and G. Molinaro of this department (to be published) indicate that tumourjbrain concentration ratios are the same for arsenate and arsenite, although there is a difference in rate of excretion a t low specific activities.

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“…Ru 106 (as Rh 106 ) and the reference standards Ba 140 and Cs 137 were determined by fi counting. The disintegration rate of Ru 103 was found by y counting, assuming the decay scheme proposed by Kondaiah 2 and Mei, 3 and with allowance for the y's arising from the Ru 106 present. This allowance was determined by /3 and y counting pure Ru lj6 separated from old fission products.…”

mentioning

confidence: 99%

The Fission Yields ofRu103andRu106

Hardwick

1953

Phys. Rev.

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with eV-0.S}x and a>-1.6/*, one obtains 0.33, as compared with 0.14 for the Dirac electron, while with w=1.85ju the values are 0.16 and 0.03, respectively. Apart from this difference in magnitude, there is also a typical minimum of R with increasing incident energy below co = 3ju, which is impossible with the Dirac electron, where R drops montonically to zero for such high values of o>. Similar marked effects in the region of validity of the ordinary interpretation can be found in other more realistic problems (e.g., Coulomb and Compton scattering, details of which will be given elsewhere), and they may thus lead to tests of the theory regardless of questions of interpretation in other regions.

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The Disintegration of Ruthenium 103 and Palladium 103

Cited by 25 publications

References 7 publications

Discovery of palladium, antimony, tellurium, iodine, and xenon isotopes

Discovery of palladium, antimony, tellurium, iodine, and xenon isotopes

The Calculation of Absorbed Tissue Doses from Arsenic-72

The Fission Yields ofRu103andRu106

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