Other researchers have since suggested that the shroud is much older and that the dating process was incorrect because of neutron radiation – a process which is the result of nuclear fusion or nuclear fission during which free neutrons are released from atoms – and its interaction with the nuclei of other atoms to form new carbon isotopes.
However, no plausible physical reason has yet been proposed to explain the origin of this neutron radiation.
"We believe it is possible that neutron emissions by earthquakes could have induced the image formation on the Shroud's linen fibres, through thermal neutron capture on nitrogen nuclei, and could also have caused a wrong radiocarbon dating," hypothesizes Carpinteri.
Explore further: Age test of Shroud of Turin planned More information: Carpinteri, A. Is the Shroud of Turin in relation to the Old Jerusalem historical earthquake?
In the process, neutrons are produced without gamma emissions.
Analogously, the researchers theorize further that neutron flux increments, in correspondence to seismic activity, should be a result of the same reactions.
(Phys.org) —An earthquake in Old Jerusalem might be behind the famous image of the Shroud of Turin, says a group of researchers led by Alberto Carpinteri of the Politecnico di Torino in Italy in an article published in Springer's journal Meccanica.
On the one hand, this could have created the distinctive image on the Shroud through radiation imagery, while on the other, it could have increased the level of carbon-14 isotopes found on the linen fibres that could have confused the 1988 radiocarbon dating tests.Pope Francis has made comments on the Shroud of Turin, the much-discussed and analyzed burial cloth that some believe shows the face of Jesus Christ, saying that it "speaks to the heart," though he stopped short of declaring the piece an official relic.Now Carpinteri's team, through mechanical and chemical experimentation, hypothesizes that high-frequency pressure waves generated in the Earth's crust during earthquakes are the source of such neutron emissions.This is based on their research into piezonuclear fission reactions, which are triggered when very brittle rock specimens are crushed under a press machine.
The Shroud has attracted widespread interest ever since Secondo Pia took the first photograph of it in 1898: about whether it is Jesus' purported burial cloth, how old it might be, and how the image was created.According to radiocarbon dating done in 1988, the cloth was only 728 years old at the time.