Beta-plus (Î² +) radiation is the emission of positrons, which are the antimatter form of electrons. When a positron slows to speeds similar to those of electrons in the material, the positron will annihilate an electron, releasing two gamma photons of 511 keV in the process.
The Congressional Budget Office puts the cut-off lower, at $347,000 in 2007, or $252,000 after subtracting federal taxes and adding back transfers. Measured by net worth, rather than income, the top 1% started at $6.9m in 2009, according to the Federal Reserve, down 23% from 2007.
For a couple with two children, the median income of the top 10% is Â£151,400, compared to Â£19,700 in the lowest decile. income figures treasury. The figures paint a picture of what average incomes are in the UK for different household types. It may come as a surprise to some people that an income for a single adult of less than Â£39,800 is enough to be among the top 20% of earners for that group.