1967 1967 1962 1962 Mont Citron was later removed to make way for Linac 4 - the soil was moved next to what is now [2015] SM18. 1960 1960 1960 1960 Safety 1958 1958 Bernard Miles Wheatley (1923–2014) 1960 1960 Bernard Miles Wheatley was the first staff member recruited specifically for radiation hazard supervision. The building of the laboratory can be seen in photo 2698. 1960 1960 CERN Courier 114-116 10 4 1970 1970 The new detector for high energy (over 20 MeV) radiation developed by the Health Physics group. Cylinders of a plastic material with a high carbon 12 content are introduced. The carbon 12 under the effect of previous exposure to high energy radiation can be converted into the radioactive isotope carbon 11 which gives off gamma rays. In the detector the cylinder acts as a scintillator revealing its own radiation. This is observed by a photomultiplier tube and recorded on punched tape. Thick walls shield against background radiation. 1970 1970 Denise David 1969 1969 Related album 1968 1968 Related album 1967 1967 Daily measurement studies were carried out at CERN over 10 days to investigate the effect of radiation on the growth of the primary root of <i>Vicia faba prolifica</i> longpod (by appointment to the HRH Queen Elizabeth II, specially brought over from the UK). Studies examined many different dosages and types of beam, including 400 GeV. Many other studies were done using <i>Vicia faba</i> roots, for instance by looking at genetic damage caused by micronuclei induction, chromosomal aberrations, etc. These roots were a good system for studying a wide range of dosages in a reproducible way. 1963 1963 1964 1964 Rasmus Christian Raffnsøe, radiation surveyor in PS, at his desk, handing out dosimeters to those who had to work in the PS ring area. Medical Service 1968 1968 1963 1963 An experiment invesitgating the relative biological efficiency on rats of secondary radiation by 592 MeV protons from the SC was carried out by G. Legeay and J. Baarli. The results were published in 1968.