Counts per second

Physical unit
Unit name	Counts per second
Unit symbol	${\displaystyle \mathrm {cps} }$
Physical quantity (s)	frequency
Formula symbol	${\displaystyle n}$
dimension	${\displaystyle \mathrm {T} ^{-1}}$
In SI units	${\displaystyle \mathrm {1\;cps=1\;s^{-1}} }$
See also: Hertz

Physical unit
Unit name	Counts per minute
Unit symbol	${\displaystyle \mathrm {cpm} }$
Physical quantity (s)	frequency
Formula symbol	${\displaystyle n}$
dimension	${\displaystyle \mathrm {T} ^{-1}}$
In SI units	${\displaystyle \mathrm {1\;cpm=1\cdot (60\;s)^{-1}} }$

Counts per second ( dt. Counts or counts per second ), short cps , is a unit of measurement for the count rate (the average repetition frequency are counted by measuring signals separated as a time-specific events). Analogous to the unit counts per second , the unit counts per minute (cpm) is defined.

use

An event in this sense is usually the registration of a photon , electron or other particle by a particle detector . The unit is commonly used in atomic and nuclear physics and in many applications, e.g. B. X-ray induced photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) as well as used in nuclear medicine .

Demarcation

The unit cps is in principle equivalent to the unit Hertz (Hz); Hz is normally used for periodic processes, whereas cps is used for counting events that are randomly distributed over time (the number of events per unit of time usually fluctuates according to a Poisson distribution ).

Web links

• Units of radiometry

Individual evidence

1. ↑ Hansjörg Prohl: RFA - this is how it works! ( Memento of the original from September 7, 2009 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (Chapter 1, TU Clausthal)