Counts per minute

This article is about radioactivity. For other uses of abbreviation, see CPM (disambiguation).

Counts per minute (cpm) is a measure of radioactivity. It is the number of atoms in a given quantity of radioactive material that are detected to have decayed in one minute. Disintegrations per minute (dpm) is also a measure of radioactivity. It is the number of atoms in a given quantity of radioactive material that decay in one minute. Dpm is similar to cpm, however the efficiency of the radiation detector (e.g. scintillation counter) must be accounted for when analysing data in cpm. Dpm is the number of atoms that have decayed, not the number of atoms that have been measured as decayed. Dpm is commonly used as a measure of radioactive contamination.

• One becquerel (Bq) is equal to one disintegration per second; One becquerel (Bq) is equal to 60 dpm.
• One curie (Ci) is equal to 3.7 x 10 ¹⁰ Bq or dps, which is equal to 2.22 x 10¹² dpm.

This standards- or measurement-related article is a stub. You can help Wikipedia by expanding it.v · Categories: Units of radioactivity Nuclear and atomic physics stubs Standards and measurement stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем написать курсовую Kanał (film) Boobam Look at other dictionaries: Words per minute — Words per minute, commonly abbreviated wpm, is a measure of input or output speed. For the purposes of WPM measurement a word is standardized to five characters or keystrokes.[1] For instance, I run counts as one word, but rhinoceros counts as… …   Wikipedia count per minute — noun frequency per minute • Syn: ↑counts/minute • Hypernyms: ↑frequency, ↑frequence, ↑oftenness …   Useful english dictionary counts/minute — noun frequency per minute • Syn: ↑count per minute • Hypernyms: ↑frequency, ↑frequence, ↑oftenness …   Useful english dictionary C/M — counts per minute …   Medical dictionary C/M — • counts per minute …   Dictionary of medical acronyms & abbreviations CPM — Counts Per Minute (Miscellaneous » Unit Measures) **** Cost Per thousand (Community » Media) *** Critical Path Method (Governmental » Military) *** Critical Path Method (Business » Accounting) * Certified Property Manager (Business » Positions) * …   Abbreviations dictionary cpm — • counts per minute; • cycles per minute …   Dictionary of medical acronyms & abbreviations Statistical hypothesis testing — This article is about frequentist hypothesis testing which is taught in introductory statistics. For Bayesian hypothesis testing, see Bayesian inference. A statistical hypothesis test is a method of making decisions using data, whether from a… …   Wikipedia Becquerel — Bq redirects here. For other uses, see BQ and Becquerel (disambiguation). The becquerel (symbol Bq) (pronounced: be kə rel) is the SI derived unit of radioactivity. One Bq is defined as the activity of a quantity of radioactive material in which… …   Wikipedia Ionizing radiation units — Radiation Measurement Units International System (SI) Activity of an isotope or material conventional unit: 1 curie = 37 billion disintegrations per second. SI unit: 1 becquerel = 1 disintegration per secondconversions1 curie (Ci) = 37… …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”