Efficiency of gamma rays

An experiment was conducted to study the effectiveness and efficiency of one physical mutagen i.e. gamma rays and two chemical mutagens i.e. ethyl methanesulfonate (EMS) and nitrosoguanidine (NG) in greengram. To study the nature and effect of mutagens in greengram, the percentage of lethality, pollen sterility, frequency of chlorophyll mutations, mutagenic effectiveness, mutagenic efficiency and mutation rates of each mutagen were estimated.

9p angicungduoc6 22-07-2020 16 3   Download

The ability discrimination of neutrons/gamma-rays of the detector was evaluated by the charge comparison (CC) method using an 252Cf source. The total efficiencies when measured on 22Na, 137Cs, 60Co and 252Cf sources were obtained 17.8%, 3.9%, 9.8% and 14.8%, respectively. The Figure of Merit (FoM) values of CC method were 0.4–1.55 for the range of energy 50–1000 keVee (keV electron equivalent).

6p gildur 30-11-2019 8 2   Download

nearly 10 years have passed since the first edition of this book. much progress has been made during the past decade, especially in high resolution gamma-ray spectrometry using semiconductor detectors. the increasing efficiency and the improving energy resolution made the scientists realize that they had at hand a new and beautiful research tool. improved amplifying and analyzing equipment were necessary to realize the full abilities of high resolution detectors.

748p tranthanhkhang93 24-04-2017 62 5   Download