A new approach to nucleocosmochronology

Trivedi, B. M. P.

doi:10.1086/155425

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The Age Of Our Galaxy1

Last Nucleosyntlzetic Events1

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Cited by 12 publications

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“…11. There have been arguments [84] that discrete events (nucleosynthesis during the passage of a spiral arm) should be treated as discrete events over the whole existence of the Galaxy. The time interval between the passage of subsequent spiral arms is roughly 2 x 108 a making it necessary to place nucleosynthesis spikes with this time interval in such a model.…”

Section: The Age Of Our Galaxymentioning

confidence: 99%

Beta-delayed fission and neutron emission: Consequences for the astrophysicalr-process and the age of the galaxy

1983

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Section: The Age Of Our Galaxymentioning

confidence: 99%

Beta-delayed fission and neutron emission: Consequences for the astrophysicalr-process and the age of the galaxy

1983

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“…(ii) Star formation is stimulated when a galactic spiral wave (Lin and Shu 1964) traverses a region of gas and dust, which occurs approximately every 108 yr. Trivedi (1977) has devised a granular nucleocosmochronology based on the idea of a pre-solar cloud passing through a galactic arm and he estimates 50i-10 passes before contraction.…”

Section: Last Nucleosyntlzetic Eventsmentioning

confidence: 99%

Nucleocosmochronology

Symbalisty

Schramm²

1981

Rep. Prog. Phys.

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Nucleocosmochronology is reviewed, emphasising its model-independent foundation and both the model-independent and dependent results. The long-lived radionuclides 232Th/238U and 187Re/l870s set a lower limit on the age of the Universe of 8.7 x 109 yr by their model-independent determination of the mean age of the elements. The shortlived chronometers 129I/127I, 26Al/27Al and lo7Pd/110Pd paint a picture of the last nucleosynthetic events that includes a supernova(e) association with the embryonic solar system. The possibility of elucidating this scenario by further development of these chronometers and also the 146Sm/142Nd and 247Cm/238U pairs is discussed. It is shown that intermediate-lived nuclides are in principle capable of describing the time dependence of the nucleosynthetic production function. However, the present situation does not allow serious model-independent constraints of this type. Nucleocosmochronology, when coupled with other independent determinations of the age of the Universe, is found to place a clear constraint on galactic evolution models in general.

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Beta Decay Far from Stability and Its Role in Nuclear Physics and Astrophysics

Klapdor

1985

Fortschr. Phys.

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A new approach to nucleocosmochronology

Cited by 12 publications

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Beta-delayed fission and neutron emission: Consequences for the astrophysicalr-process and the age of the galaxy

Beta-delayed fission and neutron emission: Consequences for the astrophysicalr-process and the age of the galaxy

Nucleocosmochronology

Beta Decay Far from Stability and Its Role in Nuclear Physics and Astrophysics

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