Diskussion:Piezonukleare Reaktion
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Hinweis: dieser Artikel ist schwierig in seiner ersten Fassung zu erstellen, da die Quellen oft unzuverlässig sind und viel Material erst über den Übersetzer laufen muss. Es scheint bislang auch keine Texte zu geben, in denen auf seriöse Weise das Thema zusammenfassend behandelt wird. Ich werde den Artikel in den nächsten Tagen noch einmal stark überarbeiten, vor allem die Einleitung. Hoffe, dass wir es dann schaffen werden das Thema in einem zusammenfassenden Artikel abzuhandeln. Abrax (Diskussion) 10:52, 7. Jan. 2013 (CET)
Zitat:
From: Technology Review Feed - arXiv blog <howdy at arxivblog.com> Date: Tue, 07 Jul 2009 12:19:59 +0000 To: eugen at leitl.org Subject: the physics arXiv blog
[1]the physics arXiv blog
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[2]Can pressure waves speed up nuclear decay?
Posted: 06 Jul 2009 09:10 PM PDT
If cavitation can speed up the decay of nuclei in solution, we've yet to see good evidence for it
Is it possible to speed up radioactive decay by squeezing atoms?
In the last few months, Fabio Cardone at the Institute of Nanostructured Materials in Rome, Italy, and a few pals have posted on the arXiv a growing body of evidence that it does. In March, Cardone and co reported an increase in neutron emissions when crushing marble and granite. Their conjecture is that the crushing causes the piezonuclear fission of iron atoms into two aluminium nuclei emitting two neutrons.
But our focus today is a paper published in February, in which the team reported that cavitation--the generation and collapse of tiny bubbles in a liquid using pressure waves--causes the rate of decay of thorium-228 in solution to increase 1000 times.
I guess it's not entirely beyond belief that cavitation could have an effect on the nuclei of atoms in solution. Cavitation is known to generate huge pressures and temperatures. By some theories, the energy released in this process is close to that needed for fusion. But it's fair to say that the current consensus is that there is no good evidence that this line has been crossed in practice. Nevertheless, Cardone's claims are interesting and his paper was published in Physics Letters A earlier this year. Today, however, Stephan Pomp and pals from Uppsala University in Sweden, cast some doubt on the result and the methods used by the Cardone team in the Physics Letters A paper. They point out that the Cardone claim is extraordinary given the body of evidence gathered over the past 100 years about nuclear decay. Such an extraordinary claim should be backed by extraordinary evidence. "We find that such evidence is missing in this paper and it even seems that methodological mistakes have been made," they say. Thorium decays be emitting alpha particles. Pomp and pals say Cardone and co placed their detector underneath the glass vessel containing the thorium solution. "We note that the range of the emitted a particles in glass is in the order of tens of micrometers and that it thus would be impossible for particles...to penetrate the vessel." They suggest a number of tests that Cardone and co can do to strengthen their results, such as measuring the background counts when the vessel is empty or filled with pure water in which cavitation is taking place. It'll be interesting to see the Cardone team's reply to these criticisms; perhaps they'll be able answer each point made by Pomp and pals. In the meantime, the question still stands: can pressure waves accelerate nuclear decay? Not on the evidence presented by Cardone and co so far. Ref: [3]arxiv.org/abs/0903.3104 : Piezonuclear Neutrons From Fracturing of Inert Solids [4]arxiv.org/abs/0710.5177: Speeding Up Thorium Decay [5]arxiv.org/abs/0907.0623: Comments on "Piezonuclear decay of thorium" by F. Cardone et. al. [6][ISMAP:di] [7][ISMAP:di] [8][arXivblog?d=yIl2AUoC8zA] [9][arXivblog?d=dnMXMwOfBR0] [10][arXivblog?i=jTN02ri-DWU:fFF5uR7ucW0:gIN9vFwOqvQ] [11][arXivblog?d=7Q72WNTAKBA] [12][arXivblog?i=jTN02ri-DWU:fFF5uR7ucW0:V_sGLiPBpWU] [13][arXivblog?d=l6gmwiTKsz0] [14][arXivblog?d=qj6IDK7rITs] You are subscribed to email updates from [15]Technology Review Feed - arXiv blog To stop receiving these emails, you may [16]unsubscribe now. Email delivery powered by Google Google Inc., 20 West Kinzie, Chicago IL USA 60610
References
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zurückgezogene (retracted) Artikel
Folgende für die Veröffentlichung vorgesehene Artikel in der Zeitschrift Meccanica (Heft Juni 2015, Vol 50, I.6) wurden zurückgezogen:
- A. Carpinteri, G. Lacidogna, O. Borla: "Is the Shroud of Turin in relation to the old Jerusalem historical earthquake?", Meccanica, June 2015, Volume 50, Issue 6
- A. Carpinteri, O. Borla, G. Lacidogna: "Elemental content variations in crushed mortar specimens measured by instrumental neutron activation analysis (INAA)", Meccanica, June 2015, Volume 50, Issue 6, p 1647
- G. Niccolini, O. Borla, G. Lacidogna, A. Carpinteri: "Correlated fracture precursors in rocks and cement based materials under stress", Meccanica June 2015, Volume 50, Issue 6
- A. Carpinteri, A. Manuello: "Evolution and fate of chemical elements in the Earth’s crust, ocean, and atmosphere", Meccanica, June 2015, Volume 50, Issue 6
- F. Cardone, A. Carpinteri, A. Manuello, R. Mignani, A. Petrucci, E. Santoro, M. Sepielli: "Ultrasonic piezonuclear reactions in steel and sintered ferrite bars", Meccanica, June 2015, Volume 50, Issue 6
- A. Carpinteri, G. Lacidogna, O. Borla: "Alpha particle emissions fron Carrara marble specimens crushed in compression and x-ray photoelectron spectroscopy of correlated nuclear transmutations", Meccanica, June 2015, Volume 50, Issue 6
- S. Invernizzi, O. Borla, G. Lacidogna, A. Carpinteri: "Piezonuclear evidences from tensile and compression tests on steel", Meccanica,
- F. Accornero, S. Invernizzi, G. Lacidogna, A. Carpinteri: "The Sacred Mountain of Varallo renaissance complex in Italy: damage analysis of decorated surfaces and structural supports", Meccanica, June 2015, Volume 50, Issue 6
- G. Lacidogna, O. Borla, G. Niccolini, A. Carpinteri: "Correlation between acoustic and other forms of energy emissions from fracture phenomena", Meccanica,
- O. Borla, G. Lacidogna, A, Carpinteri: "Piezonuclear neutron emissions from earthquakes and volcanic eruptions", Meccanica, June 2015, Volume 50, Issue 6, p 1651
Begründungen: This article has been withdrawn by the Publisher and the Society in agreement with the Editor-in-Chief due to conflict of interest reasons. In a commitment to scientific integrity we decided to withdraw the article as the editorial process had been compromised.