Spectroscopy Since 1975

Articles

Are carbon micro-clusters in the Khufu pyramid blocks of organic origin? PIXE and PIGE reveal the construction of Giza’s pyramids

Guy Demortier

Roman concrete is well known and has lasted well. Now, it seems that the Egyptians used concrete to build at least some of their pyramids. Guy Demortier reports that PIGE and PIXE analyses have revealed the presence of carbon clusters in the material used to build the Khufu (Great) pyramid at Giza. This fits with a model of construction in which the blocks were cast in situ rather than cut out of stone and somehow moved into place. There’s always something new to be learnt!

Article  |  Issue 33/5 (2021)

138La as a useful isotope for gamma spectroscopy without radioactive sources

Marco Bortoluzzi, Valentina Ferraro

It is difficult to provide practical experience with gamma spectroscopy in undergraduate laboratories, and the authors have been investigating alternative sources, and the 138La isotope is a suitable candidate. As well as some background on gamma spectroscopy and radiochemistry, Marco and Valentina also provide some sample exercises that could be used for undergraduate practicals.

Article  |  Issue 32/3 (2020)

What developments do you need to work more efficiently?

Antony N. Davies

Tony Davies continues his quest to find out what you all need to work more efficiently. You will remember that in the last issue, Tony introduced his survey to discover what developments were needed in spectroscopy by readers. Some of the initial responses are explored, and Tony finds that he has opened a “can of worms”.

Tony Davies Column  |  Issue 29/6 (2017)